openapi: 3.0.0
info:
  contact:
    name: Confluent
    url: 'https://confluent.io'
    email: support@confluent.io
  description: >
    # Introduction


    The Confluent Cloud Metrics API provides actionable operational metrics
    about your Confluent

    Cloud deployment. This is a queryable HTTP API in which the user will `POST`
    a query written in

    JSON and get back a time series of metrics specified by the query.


    Comprehensive documentation is available on

    [docs.confluent.io](https://docs.confluent.io/current/cloud/metrics-api.html).


    # Available Metrics Reference


    <h3 style="margin-top: 0;">Please see the <a
    href="/docs/descriptors">Metrics Reference</a> for

    a list of available metrics.</h3>


    This information is also available programmatically via the

    [descriptors
    endpoint](#tag/Version-2/paths/~1v2~1metrics~1{dataset}~1descriptors~1metrics/get).


    # Authentication

    Confluent uses API keys for integrating with Confluent Cloud. Applications
    must be

    authorized and authenticated before they can access or manage resources in
    Confluent Cloud.

    You can manage your API keys in the Confluent Cloud Dashboard or Confluent
    Cloud CLI.


    An API key is owned by a User or Service Account and inherits the
    permissions granted

    to the owner.


    Today, you can divide API keys into two classes:


    * **Cloud API Keys** - These grant access to the Confluent Cloud Control
    Plane APIs,
      such as for Provisioning and Metrics integrations.
    * **Cluster API Keys** - These grant access to a single Confluent cluster,
    such as a specific
      Kafka or Schema Registry cluster.

    **Cloud API Keys are required for the Metrics API**. Cloud API Keys can be
    created using the

    [Confluent Cloud CLI](https://docs.confluent.io/current/cloud/cli/).


    ```

    ccloud api-key create --resource cloud

    ```


    All API requests must be made over HTTPS. Calls made over plain HTTP will
    fail. API requests

    without authentication will also fail.


    # Versioning


    Confluent APIs ensure stability for your integrations by avoiding the
    introduction

    of breaking changes to customers unexpectedly. Confluent will make
    non-breaking

    API changes without advance notice. Thus, API clients **must** follow the

    [Compatibility Policy](#section/Versioning/Compatibility-Policy) below to
    ensure your

    ingtegration remains stable. All APIs follow the API Lifecycle Policy
    described below,

    which describes the guarantees API clients can rely on.


    Breaking changes will be [widely communicated](#communication) in advance in
    accordance

    with our [Deprecation Policy](#section/Versioning/Deprecation-Policy).
    Confluent will provide

    timelines and a migration path for all API changes, where available. Be sure
    to subscribe

    to one or more [communication channels](#communication) so you don't miss
    any updates!


    One exception to these guidelines is for critical security issues. We will
    take any necessary

    actions to mitigate any critical security issue as soon as possible, which
    may include disabling

    the vulnerable functionality until a proper solution is available.


    Do not consume any Confluent API unless it is documented in the API
    Reference. All undocumented

    endpoints should be considered private, subject to change without notice,
    and not covered by any

    agreements.


    > Note: The "v1" in the URL is not a "major version" in the

    [Semantic Versioning](https://semver.org/) sense. It is a "generational
    version" or

    "meta version", as seen in other APIs like

    <a href="https://developer.github.com/v3/versions/" target="_blank">Github
    API</a> or the

    <a href="https://stripe.com/docs/api/versioning" target="_blank">Stripe
    API</a>.


    ## Changelog


    ### 2022-12-01


    #### The dataset `health-plus` is now available in preview.

    See the [Datasets](#section/Object-Model/Datasets) section for more details.


    ### 2022-10-18


    #### `cluster_active_link_count` metric is deprecated

    The `io.confluent.kafka.server/cluster_active_link_count` is now deprecated.
    Please use the

    `io.confluent.kafka.server/cluster_link_count` metric instead.


    #### New metrics available in `/export`

    The following metrics are now available in the `/export` endpoint:

    * `io.confluent.kafka.server/request_bytes`

    * `io.confluent.kafka.server/response_bytes`

    * `io.confluent.kafka.server/cluster_link_destination_response_bytes`

    * `io.confluent.kafka.server/cluster_link_source_response_bytes`

    * `io.confluent.kafka.server/cluster_link_count`

    * `io.confluent.kafka.server/cluster_link_mirror_topic_count`

    * `io.confluent.kafka.server/cluster_link_mirror_topic_offset_lag`

    * `io.confluent.kafka.server/cluster_link_mirror_topic_bytes`


    ### 2022-10-17


    #### API Version 1 is marked sunset

    All API Version 1 endpoints are no longer supported from 2022-10-17. API
    users

    should migrate to API [Version 2](#tag/Version-2).


    ### 2021-09-23


    #### API Version 1 is now deprecated

    All API Version 1 endpoints are now deprecated and will be removed on
    2022-04-04. API users

    should migrate to API [Version 2](#tag/Version-2).


    ### 2021-08-24


    #### Metric-specific aggregation functions

    New metrics are being introduced that require alternative aggregation
    functions (e.g. `MAX`).

    When querying those metrics, using `agg: "SUM"` will return an error.

    It is recommended that clients **omit the `agg` field in the request** such
    that the required

    aggregation function for the specific metric is automatically applied on the
    backend.


    > Note: The initial version of Metrics API required clients to effectively
    hardcode `agg: "SUM"`

    > in all queries.  In early 2021, the `agg` field was made optional, but
    many clients have not

    > been updated to omit the `agg` field.


    #### Cursor-based pagination for `/query` endpoint

    The `/query` endpoint now supports cursor-based pagination similar to the
    `/descriptors` and

    `/attributes` endpoints.


    ### 2021-02-10


    #### API Version 2 is now Generally Available (GA)

    See the [Version 2](#tag/Version-2) section below for a detailed description
    of changes and

    migration guide.


    ### 2020-12-04


    #### API Version 2 *(Preview)*

    Version 2 of the Metrics API is now available in Preview. See the [Version
    2](#tag/Version-2)

    section below for a detailed description of changes.


    ### 2020-07-08


    #### Correction for `active_connection_count` metric

    A bug in the `active_connection_count` metric that affected a subset of
    customers was fixed.

    Customers exporting the metric to an external monitoring system may observe
    a discontinuity

    between historical results and current results due to this one-time
    correction.


    ### 2020-04-01

    This release includes the following changes from the preview release:


    #### New `format` request attribute

    The `/query` request now includes a `format` attribute which controls the
    result structuring in

    the response body.  See the `/query` endpoint definition for more details.


    #### New `/available` endpoint

    The new `/available` endpoint allows determining which metrics are available
    for a set of

    resources (defined by labels). This endpoint can be used to determine which
    subset of metrics

    are currently available for a specific resource (e.g. a Confluent Cloud
    Kafka cluster).


    #### Metric type changes

    The `CUMULATIVE_(INT|DOUBLE)` metric type enumeration was changed to
    `COUNTER_(INT|DOUBLE)`.

    This was done to better align with OpenTelemetry conventions. In tandem with
    this change,

    several metrics that were improperly classified as `GAUGE`s were
    re-classified as `COUNTER`s.


    ### Metric name changes

    The `/delta` suffix has been removed from the following metrics:

    * `io.confluent.kafka.server/received_bytes/delta`

    * `io.confluent.kafka.server/sent_bytes/delta`

    * `io.confluent.kafka.server/request_count/delta`


    ### 2020-09-15


    #### Retire `/available` endpoint

    The `/available` endpoint (which was in _Preview_ status) has been removed
    from the API.

    The `/descriptors` endpoint can still be used to determine the universe of
    available

    metrics for Metrics API.


    **The legacy metric names are deprecated and will stop functioning on
    2020-07-01.**


    ## API Lifecycle Policy


    The following status labels are applicable to APIs, features, and SDK
    versions, based on

    the current support status of each:


    * **Early Access** – May change at any time. Not recommended for production
    usage. Not
      officially supported by Confluent. Intended for user feedback only. Users must be granted
      explicit access to the API by Confluent.
    * **Preview** – Unlikely to change between Preview and General Availability.
    Not recommended
      for production usage. Officially supported by Confluent for non-production usage.
      For Closed Previews, users must be granted explicit access to the API by Confluent.
    * **Generally Available (GA)** – Will not change at short notice.
    Recommended for production
      usage. Officially supported by Confluent for non-production and production usage.
    * **Deprecated** – No longer supported. Will be removed in the future at the
    announced date.
      Use is discouraged and migration following the upgrade guide is recommended.
    * **Sunset** – Removed, and no longer supported or available.


    Resources, operations, and individual fields in the

    <a href="./api.yaml" target="_blank">OpenAPI spec</a> will be annotated with

    `x-lifecycle-stage`, `x-deprecated-at`, and `x-sunset-at`. These annotations
    will appear in the

    corresponding API Reference Documentation. An API is "Generally Available"
    unless explicitly

    marked otherwise.


    ## Compatibility Policy


    Confluent APIs are governed by

    <a href="https://docs.confluent.io/current/cloud/limits.html#upgrade-policy"
    target="_blank">

    Confluent Cloud Upgrade Policy</a> in which we will make backward
    incompatible changes and

    deprecations approximately once per year, and will provide 180 days notice
    via email to all

    registered Confluent Cloud users.


    ### Backward Compatibility


    > *An API version is backwards-compatible if a program written against the
    previous version of

    > the API will continue to work the same way, without modification, against
    this version of the

    > API.*


    Confluent considers the following changes to be backwards-compatible:


    * Adding new API resources.

    * Adding new optional parameters to existing API requests (e.g., query
    string or body).

    * Adding new properties to existing API responses.

    * Changing the order of properties in existing API responses.

    * Changing the length or format of object IDs or other opaque strings.
      * Unless otherwise documented, you can safely assume object IDs we generate will never exceed
        255 characters, but you should be able to handle IDs of up to that length.
        If you're using MySQL, for example, you should store IDs in a
        `VARCHAR(255) COLLATE utf8_bin` column.
      * This includes adding or removing fixed prefixes (such as `lkc-` on kafka cluster IDs).
      * This includes API keys, API tokens, and similar authentication mechanisms.
      * This includes all strings described as "opaque" in the docs, such as pagination cursors.
    * Omitting properties with null values from existing API responses.


    ### Client Responsibilities


    * Resource and rate limits, and the default and maximum sizes of paginated
    data **are not**
      considered part of the API contract and may change (possibly dynamically). It is the client's
      responsibility to read the road signs and obey the speed limit.
    * If a property has a primitive type and the API documentation does not
    explicitly limit its
      possible values, clients **must not** assume the values are constrained to a particular set
      of possible responses.
    * If a property of an object is not explicitly declared as mandatory in the
    API, clients
      **must not** assume it will be present.
    * A resource **may** be modified to return a "redirection" response (e.g.
    `301`, `307`) instead
      of directly returning the resource. Clients **must** handle HTTP-level redirects, and respect
      HTTP headers (e.g. `Location`).

    ## Deprecation Policy


    Confluent will announce deprecations at least 180 days in advance of a
    breaking change

    and we will continue to maintain the deprecated APIs in their original form
    during this time.


    Exceptions to this policy apply in case of critical security vulnerabilities
    or functional

    defects.


    ### Communication


    When a deprecation is announced, the details and any relevant migration

    information will be available on the following channels:


    * Publication in the [API Changelog](#section/Versioning/Changelog)

    * Lifecycle, deprecation and "x-deprecated-at" annotations in the
      <a href="/docs/api.yaml" target="_blank">OpenAPI spec</a>
    * Announcements on the
      <a href="https://www.confluent.io/blog/" target="_blank">Developer Blog</a>,
      <a href="https://confluentcommunity.slack.com" target="_blank">Community Slack</a>
      (<a href="https://slackpass.io/confluentcommunity" target="_blank">join!</a>),
      <a href="https://groups.google.com/forum/#!forum/confluent-platform" target="_blank">
      Google Group</a>,
      the <a href="https://twitter.com/ConfluentInc" target="_blank">@ConfluentInc twitter</a>
      account, and similar channels
    * Enterprise customers may receive information by email to their specified
    Confluent contact,
      if applicable.

    # Object Model

    The object model for the Metrics API is designed similarly to the

    [OpenTelemetry](https://opentelemetry.io/) standard.


    ## Metrics

    A _metric_ is a numeric attribute of a resource, measured at a specific
    point in time, labeled

    with contextual metadata gathered at the point of instrumentation.


    There are two types of metrics:

    * `GAUGE`: An instantaneous measurement of a value.
      Gauge metrics are implicitly averaged when aggregating over time.
      > Example: `io.confluent.kafka.server/retained_bytes`
    * `COUNTER`: The count of occurrences in a _single (one minute) sampling
      interval_ (unless otherwise stated in the metric description).
      Counter metrics are implicitly summed when aggregating over time.
      > Example: `io.confluent.kafka.server/received_bytes`

    The list of metrics and their labels is available at
    [/docs/descriptors](/docs/descriptors).


    ## Resources

    A _resource_ represents an entity against which metrics are collected.  For
    example, a Kafka

    cluster, a Kafka Connector, a ksqlDB application, etc.


    Each metric _descriptor_ is associated with one or more resource
    _descriptors_, representing

    the resource types to which that metric can apply.  A metric _data point_ is
    associated with a

    single resource _instance_, identified by the resource labels on that metric
    data point.


    For example, metrics emitted by Kafka Connect are associated to the
    `connector` resource type.

    Data points for those metrics include resource labels identifying the
    specific `connector`

    instance that emitted the metric.


    The list of resource types and labels are discoverable via the
    `/descriptors/resources`

    endpoint.


    ## Labels

    A _label_ is a key-value attribute associated with a metric data point.


    Labels can be used in queries to filter or group the results.  Labels must
    be prefixed when

    used in queries:

    * `metric.<label>` (for metric labels), for example `metric.topic`

    * `resource.<resource-type>.<label>` (for resource labels), for example
    `resource.kafka.id`.


    The set of valid label keys for a metric include:

    * The label keys defined on that metric's descriptor itself

    * The label keys defined on the resource descriptor for the metric's
    associated resource type


    For example, the `io.confluent.kafka.server/received_bytes` metric has the
    following labels:

    * `resource.kafka.id` - The Kafka cluster to which the metric pertains

    * `metric.topic` - The Kafka topic to which the bytes were produced

    * `metric.partition` - The partition to which the bytes were produced


    ## Datasets

    A _dataset_ is a logical collection of metrics that can be queried
    together.  The `dataset` is

    a required URL template parameter for every endpoint in this API.  The
    following datasets are

    currently available:


    <table>

    <thead>
      <tr>
        <th style="width: 250px;">Dataset</th>
        <th>Description</th>
      </tr>
    </thead>

    <tbody>
      <tr>
        <td>
          <code>cloud</code>
          <p><img
              src="https://img.shields.io/badge/Lifecycle%20Stage-Generally%20Available-%230074A2"
              alt="generally-available">
        </td>
        <td>
          Metrics originating from Confluent Cloud resources.
          <p>Requests to this dataset require a resource <code>filter</code>
             (e.g. Kafka cluster ID, Connector ID, etc.) in the query for authorization purposes.
             The client's API key must be authorized for the resource referenced in the filter.
        </td>
      </tr>
      <tr>
        <td>
          <code>cloud-custom</code>
          <p><img
              src="https://img.shields.io/badge/Lifecycle%20Stage-Generally%20Available-%230074A2"
              alt="generally-available">
        </td>
        <td>
          Metrics originating from custom Confluent Cloud resources (e.g. a Custom Connector).
          <p>Requests to this dataset require a resource <code>filter</code>
             (e.g. Custom Connector ID, etc.) in the query for authorization purposes.
             The client's API key must be authorized for the resource referenced in the filter.
        </td>
      </tr>
      <tr>
        <td>
          <code>health-plus</code>
          <p><img
              src="https://img.shields.io/badge/Lifecycle%20Stage-Preview-%2300AFBA"
              alt="preview">
        </td>
        <td>
          Metrics originating from Confluent Platform resources.
        </td>
      </tr>
    </tbody>

    </table>


    # Client Considerations and Best Practices


    ## Rate Limiting

    To protect the stability of the API and keep it available to all users,
    Confluent employs

    multiple safeguards. Users who send many requests in quick succession or
    perform too many

    concurrent operations may be throttled or have their requested rejected with
    an error.

    When a rate limit is breached, an HTTP `429 Too Many Requests` error is
    returned.


    Rate limits are enforced at multiple scopes.


    ### Global Rate Limits

    A global rate limit of **60 requests per IP address, per minute** is
    enforced.


    ### Per-endpoint Rate Limits

    Additionally, some endpoint-specific rate limits are enforced.


    | Endpoint  | Rate limit |

    | --------- | ---------- |

    | `/v2/metrics/{dataset}/export` | 80 requests per resource, per hour, per
    principal.<br/>See the [export endpoint
    documentation](#tag/Version-2/paths/~1v2~1metrics~1{dataset}~1export/get)
    for details. |


    ## Retries

    Implement retry logic in your client to gracefully handle transient API
    failures.

    This should be done by watching for error responses and building in a retry
    mechanism.

    This mechanism should follow a capped exponential backoff policy to prevent
    retry

    amplification ("retry storms") and also introduce some randomness ("jitter")
    to avoid the

    [thundering herd
    effect](https://en.wikipedia.org/wiki/Thundering_herd_problem).


    ## Metric Data Latency

    Metric data points are typically available for query in the API within **5
    minutes** of their

    origination at the source.  This latency can vary based on network
    conditions and processing

    overhead.  Clients that are polling (or "scraping") metrics into an external
    monitoring system

    should account for this latency in their polling requests.  API requests
    that fail to

    incorporate the latency into the query `interval` may have incomplete data
    in the response.


    ## Pagination

    Cursors, tokens, and corresponding pagination links may expire after a short
    amount of time.

    In this case, the API will return a `400 Bad Request` error and the client
    will need to restart

    from the beginning.


    The client should have no trouble pausing between rate limiting windows, but
    persisting cursors

    for hours or days is not recommended.
  version: ''
  title: Confluent Cloud Metrics API
  x-api-id: 4be9bd3c-ea9b-4efe-89aa-946c36b50161
  x-audience: external-public
  x-logo:
    url: 'https://assets.confluent.io/m/5ec23aa91903c00b/'
servers:
  - url: 'https://api.telemetry.confluent.cloud'
x-tagGroups:
  - name: API Endpoints
    tags:
      - Version 2
tags:
  - name: Version 2
    description: >
      ![generally-available](https://img.shields.io/badge/Lifecycle%20Stage-Generally%20Available-%230074A2)


      Version 2 of the Metrics API adds the ability to query metrics for Kafka
      Connect, ksqlDB,

      and Schema Registry.


      This capability is enabled by the introduction of a
      [Resource](#section/Object-Model/Resources)

      abstraction into the API object model. Resources represent the entity
      against which metrics

      are collected.


      ### Migration Guide

      The following endpoint URLs have changed in version 2:


      | Endpoint                | Version 1 (Sunset)           | Version
      2                                |

      | ----------------------- | -------------------------------- |
      ---------------------------------------- |

      | Metrics discovery       | `/metrics/{dataset}/descriptors` |
      `/metrics/{dataset}/descriptors/metrics` |


      The label prefix syntax has changed in version 2:


      | Label                   | Version 1 (Sunset)       | Version
      2               |

      | ----------------------- | ---------------------------- |
      ----------------------- |

      | Resource labels *(new)* | *N/A*                        |
      `resource.<label>`      |

      | Kafka cluster ID        | `metric.label.cluster_id`    |
      `resource.kafka.id`     |

      | All other metric labels | `metric.label.<label>`       |
      `metric.<label>`        |


      This example shows a request to `/v1/metrics/cloud/query` migrated into
      the new `v2` syntax


      #### Version 1 Request

      ```json

      {
        "group_by": [
          "metric.label.topic"
        ],
        "aggregations": [{
          "metric": "io.confluent.kafka.server/received_bytes",
          "agg": "SUM"
        }],
        "filter": {
          "field": "metric.label.cluster_id",
          "op": "EQ",
          "value": "lkc-00000"
        },
        "granularity": "ALL",
        "intervals" : [
          "2020-01-01T00:00:00Z/PT1H"
        ]
      }

      ```


      #### Version 2 Request

      ```json

      {
        "group_by": [
          "metric.topic"
        ],
        "aggregations": [{
          "metric": "io.confluent.kafka.server/received_bytes",
          "agg": "SUM"
        }],
        "filter": {
          "field": "resource.kafka.id",
          "op": "EQ",
          "value": "lkc-00000"
        },
        "granularity": "ALL",
        "intervals" : [
          "2020-01-01T00:00:00Z/PT1H"
        ]
      }

      ```
paths:
  '/v2/metrics/{dataset}/descriptors/metrics':
    get:
      summary: List metric descriptors
      tags:
        - Version 2
      description: >
        Lists all the metric descriptors for a dataset.


        A metric descriptor represents metadata for a metric, including its data
        type and labels.

        This metadata is provided programmatically to enable clients to
        dynamically adjust as new

        metrics are added to the dataset, rather than hardcoding metric names in
        client code.
      parameters:
        - name: dataset
          in: path
          required: true
          description: >-
            The [dataset](#section/Object-Model/Datasets) to list metric
            descriptors for.
          schema:
            $ref: '#/components/schemas/Dataset'
        - name: page_size
          description: >-
            The maximum number of results to return. The page size is an integer
            in the range from 1 through 1000.
          in: query
          required: false
          schema:
            type: integer
            minimum: 1
            maximum: 1000
            default: 100
        - name: page_token
          description: >-
            The next page token. The token is returned by the previous request
            as part of `meta.pagination`.
          in: query
          required: false
          schema:
            $ref: '#/components/schemas/PageToken'
        - name: resource_type
          description: The type of the resource to list metric descriptors for.
          in: query
          required: false
          schema:
            $ref: '#/components/schemas/ResourceType'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListMetricDescriptorsResponse'
              examples:
                listResponse:
                  value:
                    data:
                      - description: >-
                          The delta count of bytes received from the network.
                          Each sample is the number of bytes received since the
                          previous data sample. The count is sampled every 60
                          seconds.
                        labels:
                          - description: The name of the Kafka topic.
                            key: topic
                            exportable: true
                        name: io.confluent.kafka.server/received_bytes
                        type: COUNTER_INT64
                        exportable: true
                        unit: By
                        lifecycle_stage: GENERAL_AVAILABILITY
                        resources:
                          - kafka
                      - description: >-
                          The delta count of bytes sent over the network. Each
                          sample is the number of bytes sent since the previous
                          data point. The count is sampled every 60 seconds.
                        labels:
                          - description: The name of the Kafka topic.
                            key: topic
                            exportable: true
                        name: io.confluent.kafka.server/sent_bytes
                        type: COUNTER_INT64
                        exportable: true
                        unit: By
                        lifecycle_stage: GENERAL_AVAILABILITY
                        resources:
                          - kafka
                    links: null
                    meta:
                      pagination:
                        page_size: 3
                        total_size: 3
        '429':
          $ref: '#/components/responses/RateLimitError'
        default:
          description: Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  '/v2/metrics/{dataset}/descriptors/resources':
    get:
      tags:
        - Version 2
      summary: List resource descriptors
      description: |
        Lists all the resource descriptors for a dataset.
      parameters:
        - name: dataset
          in: path
          required: true
          description: >-
            The [dataset](#section/Object-Model/Datasets) to list resource
            descriptors for.
          schema:
            $ref: '#/components/schemas/Dataset'
        - name: page_size
          description: >-
            The maximum number of results to return. The page size is an integer
            in the range from 1 through 1000.
          in: query
          required: false
          schema:
            type: integer
            minimum: 1
            maximum: 1000
            default: 100
        - name: page_token
          description: >-
            The next page token. The token is returned by the previous request
            as part of `meta.pagination`.
          in: query
          required: false
          schema:
            $ref: '#/components/schemas/PageToken'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListResourceDescriptorsResponse'
        '429':
          $ref: '#/components/responses/RateLimitError'
        default:
          description: Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  '/v2/metrics/{dataset}/query':
    post:
      summary: Query metric values
      tags:
        - Version 2
      description: |
        Query for metric values in a dataset.
      parameters:
        - name: dataset
          in: path
          required: true
          description: 'The [dataset](#section/Object-Model/Datasets) to query.'
          schema:
            $ref: '#/components/schemas/Dataset'
        - name: page_token
          description: >-
            The next page token. The token is returned by the previous request
            as part of `meta.pagination`. Pagination is only supported for
            requests containing a `group_by` element.
          in: query
          required: false
          schema:
            $ref: '#/components/schemas/PageToken'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/QueryRequest'
            examples:
              query:
                value:
                  group_by:
                    - metric.topic
                  aggregations:
                    - metric: io.confluent.kafka.server/sent_bytes
                      agg: SUM
                  filter:
                    op: AND
                    filters:
                      - field: resource.kafka.id
                        op: EQ
                        value: lkc-1234
                      - op: NOT
                        filter:
                          field: metric.topic
                          op: EQ
                          value: topicA
                  order_by:
                    - metric: io.confluent.kafka.server/sent_bytes
                      agg: SUM
                      order: DESCENDING
                  granularity: PT1H
                  intervals:
                    - '2019-10-17T20:17:00.000Z/PT2H'
                  limit: 5
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/QueryResponse'
              examples:
                flatResponse:
                  value:
                    data:
                      - timestamp: 2019-10-17T20:17:00.000Z
                        metric.topic: foo
                        value: 9741
                      - timestamp: 2019-10-17T20:18:00.000Z
                        metric.topic: foo
                        value: 9246
                      - timestamp: 2019-10-17T20:17:00.000Z
                        metric.topic: bar
                        value: 844.1
                      - timestamp: 2019-10-17T20:18:00.000Z
                        metric.topic: bar
                        value: 821.1
                groupedResponse:
                  value:
                    data:
                      - metric.topic: foo
                        points:
                          - timestamp: 2019-10-17T20:17:00.000Z
                            value: 9741
                          - timestamp: 2019-10-17T20:18:00.000Z
                            value: 9246
                      - metric.topic: bar
                        points:
                          - timestamp: 2019-10-17T20:17:00.000Z
                            value: 844.1
                          - timestamp: 2019-10-17T20:18:00.000Z
                            value: 821.1
        '429':
          $ref: '#/components/responses/RateLimitError'
        default:
          description: Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  '/v2/metrics/{dataset}/export':
    get:
      tags:
        - Version 2
      summary: Export metric values
      description: >
        Export current metric values in [OpenMetrics
        format](https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md)

        or [Prometheus
        format](https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format),

        suitable for import into an external monitoring system. Returns the
        single most recent

        data point for each metric, for each distinct combination of labels.


        #### Supported datasets and metrics

        Only the `cloud` and `cloud-custom` datasets are supported for this
        endpoint.


        Some metrics and labels within the datasets may not be exportable. To
        request

        a particular metric or label be added, please contact [Confluent
        Support](https://support.confluent.io).


        #### Metric translation

        Metric and label names are translated to adhere to [Prometheus
        restrictions](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).

        The `resource.` and `metric.` prefixes from label names are also dropped
        to simplify consumption in downstream systems.


        Counter metrics are classified as the Prometheus `gauge` type to conform
        to required semantics.

        > The `counter` type in Prometheus must be monotonically increasing,
        whereas Confluent

        Metrics API counters are represented as deltas.


        #### Timestamp offset

        To account for [metric data
        latency](#section/Client-Considerations-and-Best-Practices/Metric-Data-Latency),

        this endpoint returns metrics from the current timestamp minus a fixed
        offset. The current

        offset is 5 minutes rounded down to the start of the minute. For
        example, if a request is

        received at `12:06:41`, the returned metrics will have the timestamp
        `12:01:00` and represent the

        data for the interval `12:01:00` through `12:02:00` (exclusive).


        > **NOTE:** Confluent may choose to lengthen or shorten this offset
        based on operational

        considerations. _Doing so is considered a backwards-compatible change_.


        To accommodate this offset, the timestamps in the response should be
        honored when importing

        the metrics. For example, in prometheus this can be controlled using the
        `honor_timestamps`

        flag.


        #### Rate limits

        Since metrics are available at minute granularity, it is expected that
        clients scrape this

        endpoint at most once per minute. To allow for ad-hoc testing, the rate
        limit is enforced

        at hourly granularity. To accommodate retries, the rate limit is 80
        requests per hour

        rather than 60 per hour.


        The rate limit is evaluated on a per-resource basis. For example, the
        following requests would

        each be allowed an 80-requests-per-hour rate:

        * `GET
        /v2/metrics/cloud/export?resource.kafka.id=lkc-1&resource.kafka.id=lkc-2`

        * `GET /v2/metrics/cloud/export?resource.kafka.id=lkc-3`


        Rate limits for this endpoint are also scoped to the authentication
        principal. This allows multiple systems

        to export metrics for the same resources by configuring each with a
        separate service account.


        If the rate limit is exceeded, the response body will include a message
        indicating which

        resource exceeded the limit.

        ```json

        {
          "errors": [
            {
              "status": "429",
              "detail": "Too many requests have been made for the following resources: kafka.id:lkc-12345. Please see the documentation for current rate limits."
            }
          ]
        }

        ```


        #### Return limits

        To ensure values are returned in a timely fashion, data points returned
        per `resource type` per `metric` is limited to `30000`.

        If you have more than `30000` unique combinations of labels then the
        response will be truncated to return

        the first `30000` data points.


        For example, if a request is made for 4 Kafka clusters(resource type 1)
        and 3 Kafka connectors(resource type 2)

        * Assuming each Kafka cluster has `8000` topics and there are `5`
        metrics with only topic label
              It translates to `32000` unique label combinations per metric(capped to 30000) which in turn
              translates to `150,000` data points for 5 metrics.
        * Assuming each Kafka connector has `3` metrics
               It translates to 9 data points for 3 Kafka connectors.

        The data points returned for this request totals to 150,009.


        In this case, we would recommend making separate scrape jobs up to 3
        kafka clusters in order to stay within the return limits for a resource
        type.


        #### Example Prometheus scrape configuration

        Here is an example [prometheus
        configuration](https://prometheus.io/docs/prometheus/latest/configuration/configuration/)

        for scraping this endpoint:


        ```yaml

        scrape_configs:
          - job_name: Confluent Cloud
            scrape_interval: 1m
            scrape_timeout: 1m
            honor_timestamps: true
            static_configs:
              - targets:
                - api.telemetry.confluent.cloud
            scheme: https
            basic_auth:
              username: <Cloud API Key>
              password: <Cloud API Secret>
            metrics_path: /v2/metrics/cloud/export
            params:
              "resource.kafka.id":
                - lkc-1
                - lkc-2
        ```
      parameters:
        - name: dataset
          in: path
          required: true
          description: 'The [dataset](#section/Object-Model/Datasets) to export metrics for.'
          schema:
            $ref: '#/components/schemas/Dataset'
        - name: resource.kafka.id
          description: >-
            The ID of the Kafka cluster to export metrics for. This parameter
            can be specified multiple times (e.g.
            `?resource.kafka.id=lkc-1&resource.kafka.id=lkc-2`).
          in: query
          required: false
          style: form
          schema:
            type: array
            items:
              type: string
        - name: resource.connector.id
          description: >-
            The ID of the Connector to export metrics for. This parameter can be
            specified multiple times.
          in: query
          required: false
          style: form
          schema:
            type: array
            items:
              type: string
        - name: resource.custom_connector.id
          description: >-
            The ID of the custom Connector to export metrics for. This parameter
            can be specified multiple times.
          in: query
          required: false
          style: form
          schema:
            type: array
            items:
              type: string
        - name: resource.ksql.id
          description: >-
            The ID of the ksqlDB application to export metrics for. This
            parameter can be specified multiple times.
          in: query
          required: false
          style: form
          schema:
            type: array
            items:
              type: string
        - name: resource.schema_registry.id
          description: >-
            The ID of the Schema Registry to export metrics for. This parameter
            can be specified multiple times.
          in: query
          required: false
          style: form
          schema:
            type: array
            items:
              type: string
        - name: metric
          x-hidden: true
          description: >-
            The metric to export. If this parameter is not specified, all
            metrics for the resource will be exported. This parameter can be
            specified multiple times.
          in: query
          required: false
          style: form
          schema:
            type: array
            items:
              type: string
      responses:
        '200':
          description: Successful response
          content:
            text/plain;version=0.0.4:
              schema:
                description: >-
                  Metric values formatted in [Prometheus text-based
                  format](https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format).
                type: string
              example: >
                # HELP confluent_kafka_server_received_bytes The delta count of
                bytes of the customer's data received from the network. Each
                sample is the number of bytes received since the previous data
                sample. The count is sampled every 60 seconds.

                # TYPE confluent_kafka_server_received_bytes gauge

                confluent_kafka_server_received_bytes{kafka_id="lkc-1",topic="topicA"}
                10.0 1609459200

                confluent_kafka_server_received_bytes{kafka_id="lkc-1",topic="topicB"}
                20.0 1609459200

                confluent_kafka_server_received_bytes{kafka_id="lkc-2",topic="topicA"}
                30.0 1609459200


                # HELP confluent_kafka_server_sent_bytes The delta count of
                bytes of the customer's data sent to the network. Each sample is
                the number of bytes sent since the previous data sample. The
                count is sampled every 60 seconds.

                # TYPE confluent_kafka_server_sent_bytes gauge

                confluent_kafka_server_sent_bytes{kafka_id="lkc-1",topic="topicA"}
                90.0 1609459200

                confluent_kafka_server_sent_bytes{kafka_id="lkc-1",topic="topicB"}
                80.0 1609459200

                confluent_kafka_server_sent_bytes{kafka_id="lkc-2",topic="topicA"}
                70.0 1609459200
            application/openmetrics-text;version=1.0.0;charset=utf-8:
              schema:
                description: >-
                  Metric values formatted in [OpenMetrics text
                  format](https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md).
                type: string
              example: >
                # TYPE confluent_kafka_server_received_bytes gauge

                # UNIT confluent_kafka_server_received_bytes bytes

                # HELP confluent_kafka_server_received_bytes The delta count of
                bytes of the customer's data received from the network. Each
                sample is the number of bytes received since the previous data
                sample. The count is sampled every 60 seconds.

                confluent_kafka_server_received_bytes{kafka_id="lkc-1",topic="topicA"}
                30.0 1609459200.000

                confluent_kafka_server_received_bytes{kafka_id="lkc-1",topic="topicB"}
                70.0 1609459200.000

                confluent_kafka_server_received_bytes{kafka_id="lkc-2",topic="topicA"}
                230.0 1609459200.000

                confluent_kafka_server_received_bytes{kafka_id="lkc-2",topic="topicB"}
                270.0 1609459200.000

                # TYPE confluent_kafka_server_sent_bytes gauge

                # UNIT confluent_kafka_server_received_bytes bytes

                # HELP confluent_kafka_server_sent_bytes The delta count of
                bytes of the customer's data sent over the network. Each sample
                is the number of bytes sent since the previous data point. The
                count is sampled every 60 seconds.

                confluent_kafka_server_sent_bytes{kafka_id="lkc-1",topic="topicA"}
                34.0 1609459200.000

                confluent_kafka_server_sent_bytes{kafka_id="lkc-1",topic="topicB"}
                74.0 1609459200.000

                #EOF
        '429':
          description: Rate Limit Exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        default:
          description: Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  '/v2/metrics/{dataset}/attributes':
    post:
      summary: Query label values
      tags:
        - Version 2
      description: |
        Enumerates label values for a single metric.
      parameters:
        - name: dataset
          in: path
          required: true
          description: The dataset to query.
          schema:
            $ref: '#/components/schemas/Dataset'
        - name: page_token
          description: >-
            The next page token. The token is returned by the previous request
            as part of `meta.pagination`.
          in: query
          required: false
          schema:
            type: string
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AttributesRequest'
            examples:
              request:
                value:
                  metric: io.confluent.kafka.server/sent_bytes
                  group_by:
                    - metric.topic
                  filter:
                    field: resource.kafka.id
                    op: EQ
                    value: lkc-09d19
                  limit: 3
                  intervals:
                    - '2019-10-16T16:30:20Z/2019-10-24T18:57:00Z'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AttributesResponse'
              examples:
                response:
                  value:
                    data:
                      - metric.topic: bar
                      - metric.topic: baz
                      - metric.topic: foo
                    meta:
                      pagination:
                        page_size: 3
                        next_page_token: dG9waWNC
        '429':
          $ref: '#/components/responses/RateLimitError'
        default:
          description: Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
security:
  - api-key: []
components:
  securitySchemes:
    api-key:
      type: http
      scheme: basic
      description: >
        API keys must be sent as an `Authorization: Basic {key}` header with the
        Key ID as the

        username and the Key Secret as the password. Remember that HTTP Basic
        authorization

        requires you to colon-separate and base64 encode your key. For example,
        if your API Key ID

        is `ABCDEFGH123456789` and the corresponding API Key Secret is

        `XNCIW93I2L1SQPJSJ823K1LS902KLDFMCZPWEO`, then the authorization header
        will be

            Authorization: Basic QUJDREVGR0gxMjM0NTY3ODk6WE5DSVc5M0kyTDFTUVBKU0o4MjNLMUxTOTAyS0xERk1DWlBXRU8=

        This example header can be generated (using Mac OS X syntax) from the
        API key with

            $ echo -n "ABCDEFGH123456789:XNCIW93I2L1SQPJSJ823K1LS902KLDFMCZPWEO" | base64
  schemas:
    Dataset:
      type: string
      description: >-
        A logical collection of metrics that can be described and queried. Valid
        values are `cloud` and `health-plus`.
    PageToken:
      description: An opaque token that you use to get the next page of results.
      type: string
    ResourceType:
      description: 'A named type for a resource (e.g. `kafka`, `connector`).'
      type: string
    Pagination:
      description: The pagination information.
      properties:
        page_size:
          description: The page size requested by the user.
          format: int32
          type: integer
        total_size:
          description: >-
            The total number of items, if the total size can be determined in
            advance; otherwise, `total_size` is not included.
          format: int32
          type: integer
        next_page_token:
          $ref: '#/components/schemas/PageToken'
      required:
        - page_size
      example:
        page_size: 10
        total_size: 25
    Meta:
      type: object
      description: Meta object
      properties:
        pagination:
          $ref: '#/components/schemas/Pagination'
      required:
        - pagination
    Links:
      description: link information
      properties:
        next:
          description: >-
            The next page of resources in a collection. The link is present only
            if the current document is part of a collection.
          type: string
    ErrorResponse:
      type: object
      properties:
        errors:
          type: array
          items:
            type: object
            properties:
              id:
                description: >-
                  A unique identifier for this particular occurrence of the
                  problem.
                type: string
              status:
                description: >-
                  The HTTP status code applicable to this problem, expressed as
                  a string value.
                type: string
              code:
                description: >-
                  An application-specific error code, expressed as a string
                  value.
                type: string
              detail:
                description: >-
                  A human-readable explanation specific to this occurrence of
                  the problem.
                type: string
              meta:
                $ref: '#/components/schemas/Meta'
              links:
                $ref: '#/components/schemas/Links'
      required:
        - errors
      example:
        errors:
          - detail: fieldA must not be null
          - detail: fieldB must not be null
    LabelDescriptor:
      description: The description of a label.
      type: object
      properties:
        description:
          description: The description of the metric.
          type: string
        key:
          description: The key of the label.
          type: string
        exportable:
          description: Is this label included in the `/export` endpoint response?
          type: boolean
      required:
        - description
        - key
      example:
        key: topic
        description: The name of the Kafka topic.
        exportable: true
    MetricDescriptor:
      description: Defines a metric type and its schema.
      type: object
      properties:
        description:
          description: The description of the metric.
          type: string
        labels:
          description: >
            Labels for filtering and aggregating this metric. For example, you
            can

            filter the `io.confluent.kafka.server/received_bytes` metric by the

            `topic` label.
          type: array
          items:
            $ref: '#/components/schemas/LabelDescriptor'
        name:
          description: |
            The unique name of the metric, for example,
            `io.confluent.kafka.server/received_bytes`.
          type: string
        unit:
          description: >
            The unit that the metric value is reported in. Units follow the
            format described in

            [the Unified Code for Units of
            Measure](http://unitsofmeasure.org/ucum.html).

            For example, `By` for bytes and `By/s` for bytes per second.
          type: string
        type:
          description: >
            The type of the measurement. The metric type follows the

            [OpenTelemetry](https://opentelemetry.io/) exposition format.

            * `GAUGE_(INT64|DOUBLE)`: An instantaneous measurement of a value.
              Gauge metrics are implicitly averaged when aggregating over time.
            * `COUNTER_(INT64|DOUBLE)`: The count of occurrences in a _single
            (one minute) sampling
              interval_ (unless otherwise stated in the metric description).
              Counter metrics are implicitly summed when aggregating over time.
          type: string
          x-extensible-enum:
            - GAUGE_INT64
            - GAUGE_DOUBLE
            - COUNTER_INT64
            - COUNTER_DOUBLE
        lifecycle_stage:
          description: >
            The support lifecycle stage for this metric:

            * `PREVIEW`: May change at any time

            * `GENERAL_AVAILABILITY`: Fully released and stable. Will not change
            without notice.

            * `DEPRECATED`: No longer supported. Will be removed in the future
            at the annouced date.
          type: string
          x-extensible-enum:
            - PREVIEW
            - GENERAL_AVAILABILITY
            - DEPRECATED
        exportable:
          description: Is this metric included in the `/export` endpoint response?
          type: boolean
        resources:
          description: The resource types to which this metric pertains.
          type: array
          items:
            type: string
      required:
        - description
        - labels
        - name
        - unit
        - type
        - lifecycle_stage
        - exportable
        - resources
      example:
        description: >-
          The delta count of bytes received from the network. The count is
          sampled every 60 seconds.
        name: io.confluent.kafka.server/received_bytes
        unit: By
        type: GAUGE_INT64
        exportable: true
        lifecycle_stage: GENERAL_AVAILABILITY
        resources:
          - kafka
        labels:
          - key: topic
            description: The name of the Kafka topic.
            exportable: true
    ListMetricDescriptorsResponse:
      description: The ListMetricDescriptors response.
      type: object
      properties:
        data:
          description: The metric descriptors for the specified dataset.
          items:
            $ref: '#/components/schemas/MetricDescriptor'
          type: array
        meta:
          $ref: '#/components/schemas/Meta'
        links:
          $ref: '#/components/schemas/Links'
      required:
        - data
        - meta
    ResourceDescriptor:
      description: |
        A Resource represents the entity producing metrics.
        For example: a Kafka cluster a Kafka Connector, etc.
      type: object
      properties:
        type:
          $ref: '#/components/schemas/ResourceType'
        description:
          description: The description of the resource.
          type: string
        labels:
          description: |
            Labels for the resource.
            Resource labels can be used for filtering and aggregating metrics
            associated with a resource.
          type: array
          items:
            $ref: '#/components/schemas/LabelDescriptor'
      required:
        - type
        - description
        - labels
      example:
        type: kafka
        description: A Kafka cluster.
        labels:
          - key: kafka.id
            description: ID of the kafka cluster
            exportable: true
    ListResourceDescriptorsResponse:
      description: The list of resource descriptors for a dataset
      type: object
      properties:
        data:
          description: The resource descriptors for the specified dataset.
          type: array
          items:
            $ref: '#/components/schemas/ResourceDescriptor'
        meta:
          $ref: '#/components/schemas/Meta'
        links:
          $ref: '#/components/schemas/Links'
      required:
        - data
        - meta
    AggregationFunction:
      type: string
      enum:
        - SUM
    Aggregation:
      type: object
      x-java-class: io.confluent.observability.metricsquery.api.Aggregation
      properties:
        metric:
          description: The metric to aggregate.
          type: string
        agg:
          description: >-
            The aggregation function for the label buckets defined in
            `group_by`.
          allOf:
            - $ref: '#/components/schemas/AggregationFunction'
      required:
        - metric
      example:
        metric: io.confluent.kafka.server/bytes_in
        agg: SUM
    Granularity:
      description: >
        Defines the time buckets that the aggregation is performed for.

        Buckets are specified in

        [ISO-8601 duration
        syntax](https://en.wikipedia.org/wiki/ISO_8601#Durations), but

        only the enumerated values are supported. Buckets are aligned to UTC
        boundaries.

        The special `ALL` value defines a single bucket for all intervals.


        The allowed granularity for a query is restricted by the length of that
        query's `interval`.


        | Granularity          | Maximum Interval Length  |

        |----------------------|--------------------------|

        | `PT1M` (1 minute)    | 6 hours                  |

        | `PT5M` (5 minutes)   | 1 day                    |

        | `PT15M` (15 minutes) | 4 days                   |

        | `PT30M` (30 minutes) | 7 days                   |

        | `PT1H` (1 hour)      | Unlimited                |

        | `PT4H` (4 hours)     | Unlimited                |

        | `PT6H` (6 hours)     | Unlimited                |

        | `PT12H` (12 hours)   | Unlimited                |

        | `P1D` (1 day)        | Unlimited                |

        | `ALL`                | Unlimited                |
      type: string
      format: ISO-8601 duration (PnDTnHnMn.nS) or ALL
      enum:
        - PT1M
        - PT5M
        - PT15M
        - PT30M
        - PT1H
        - PT4H
        - PT6H
        - PT12H
        - P1D
        - ALL
      example: PT1H
    FieldFilter:
      title: Field Filter
      type: object
      x-java-class: io.confluent.observability.metricsquery.api.Filter
      properties:
        op:
          type: string
          description: >
            The comparison operator for the filter.

            Note that labels are compared _lexicographically_.


            The `GT` or `GTE` operators can be used to page through grouped
            result sets that exceed

            the query limit.
          enum:
            - EQ
            - GT
            - GTE
        field:
          description: >
            The field to filter on; see [here](#section/Object-Model/Labels) on
            using labels as

            filter fields.
          type: string
          example: metric.topic
        value:
          oneOf:
            - type: string
            - type: integer
      required:
        - op
        - value
      example:
        op: EQ
        field: resource.kafka.id
        value: lkc-1234
    Filter:
      description: Metric filter.
      oneOf:
        - $ref: '#/components/schemas/FieldFilter'
        - $ref: '#/components/schemas/CompoundFilter'
        - $ref: '#/components/schemas/UnaryFilter'
    CompoundFilter:
      title: Compound Filter
      type: object
      x-java-class: io.confluent.observability.metricsquery.api.Filter
      properties:
        op:
          type: string
          enum:
            - AND
            - OR
        filters:
          type: array
          items:
            $ref: '#/components/schemas/Filter'
      required:
        - op
        - filters
      example:
        op: OR
        filters:
          - field: resource.kafka.id
            op: EQ
            value: lkc-1234
          - field: resource.kafka.id
            op: EQ
            value: lkc-5678
    UnaryFilter:
      title: Unary Filter
      type: object
      x-java-class: io.confluent.observability.metricsquery.api.Filter
      properties:
        op:
          type: string
          enum:
            - NOT
        filter:
          $ref: '#/components/schemas/Filter'
      required:
        - op
        - filter
      example:
        op: NOT
        filter:
          field: metric.topic
          op: EQ
          value: topicA
    OrderBy:
      type: object
      properties:
        metric:
          type: string
        agg:
          $ref: '#/components/schemas/AggregationFunction'
        order:
          type: string
          enum:
            - ASCENDING
            - DESCENDING
          default: DESCENDING
      required:
        - metric
      example:
        metric: io.confluent.kafka.server/bytes_in
        agg: SUM
        order: DESCENDING
    Interval:
      type: string
      format: >-
        ISO-8601 interval (<start>/<end> | <start>/<duration> |
        <duration>/<end>)
    ResponseFormat:
      description: >
        Desired response format for query results.

        * `FLAT` (default): Each item in the response `data` array represents a
        data point in the
          timeseries. Each data point contains the `timestamp`, metric aggregation `value` and
          attributes for the `group_by` labels.
        * `GROUPED`: Each item in the response `data` array represents a group.
        Each group contains
          attributes for the `group_by` labels and an array of `points` for the metric aggregation
          timeseries. **Only allowed when `group_by` is non-empty.**

        Please see the response schema and accompanying examples for more
        details.
      type: string
      enum:
        - FLAT
        - GROUPED
      default: FLAT
    QueryRequest:
      type: object
      x-java-class: io.confluent.observability.metricsquery.api.MetricsQueryRequest
      properties:
        aggregations:
          description: >-
            Specifies which metrics to query and the aggregation operator to
            apply across the `group_by` labels. **Currently, only one
            aggregation per request is supported.**
          type: array
          items:
            $ref: '#/components/schemas/Aggregation'
          minItems: 1
          maxItems: 1
        group_by:
          description: >
            Specifies how data gets bucketed by label(s); see
            [here](#section/Object-Model/Labels)

            on using labels for grouping query results.
          type: array
          items:
            type: string
        granularity:
          $ref: '#/components/schemas/Granularity'
        filter:
          $ref: '#/components/schemas/Filter'
        order_by:
          description: >
            Sort ordering for result groups. **Only valid for `granularity:
            "ALL"`.**

            If not specified, defaults to the first `aggregation` in descending
            order.


            Note that this ordering applies to the groups.

            Within a group (or for ungrouped results), data points are always
            ordered by `timestamp`

            in descending order.
          type: array
          items:
            $ref: '#/components/schemas/OrderBy'
          maxItems: 1
        intervals:
          description: >
            Defines the time range(s) that the query runs over.

            A time range is an ISO-8601 interval.


            The keyword `now` can be used in place of a timestamp to refer to
            the current time.

            Offset and truncation modifiers can be also be applied to the `now`
            expression:


            | Modifier | Syntax | Examples |

            | --- | --- | --- |

            | Offset | `(+\|-)<amount>(m\|h\|d)` | `-2m` (minus 2
            minutes)<br/>`-1h` (minus 1 hour) |

            | Truncation | `\|(m\|h\|d)` | `\|m` (round down to start of
            minute)<br/>`\|h` (round down to start of hour) |


            All hour/day truncation is performed against the UTC timezone.


            If `now` is `2020-01-01T02:13:27Z`, some examples are:

            * `now-2m|m`: `now` minus 2 minutes, truncated to start of minute.

            <br/>Resolves to `2020-01-01T02:11:00Z`

            * `now|h`: `now` truncated to start of hour.

            <br/>Resolves to `2020-01-01T02:00:00Z`

            * `now-1d|d`: `now` minus 1 day, truncated to start of day.

            <br/>Resolves to `2019-12-31T00:00:00Z`


            When using `now`, it is recommended to apply a negative offset to
            avoid incomplete data

            (see [metric availability
            delays](#section/Client-Considerations-and-Best-Practices/Metric-Data-Latency))

            and align to minute boundaries (e.g. `now-2m|m`).
          type: array
          items:
            $ref: '#/components/schemas/Interval'
          minItems: 1
        limit:
          description: >-
            The maximum number of _groups_ to return. Only supported with a
            non-empty `group_by` field. The maximum number of data points in the
            response is equal to `limit * (interval / granularity)`. For
            example, with an interval of 1 day, granularity of `PT1H`, and limit
            of `2` there will be a maximum of 48 data points in the response (24
            for each group). For granularity of `ALL`, the limit defaults to
            1000.
          type: integer
          minimum: 1
          maximum: 1000
          default: 100
        format:
          $ref: '#/components/schemas/ResponseFormat'
      required:
        - intervals
        - aggregations
        - granularity
    Point:
      type: object
      properties:
        timestamp:
          description: 'The timestamp for this time bucket, aligned to UTC boundaries.'
          type: string
          format: date-time
        value:
          description: The value for the requested aggregation for this time bucket.
          type: number
      additionalProperties: true
      required:
        - timestamp
        - value
      example:
        timestamp: 2019-10-17T20:17:00.000Z
        resource.kafka.id: lkc-12345entry
        metric.topic: foo
        value: 9741
    FlatQueryResponse:
      title: Flat Response
      type: object
      properties:
        data:
          description: >-
            An array of results for this query. Each item includes `timestamp`,
            `value`, and an attribute for each label specified in the request's
            `group_by`.
          type: array
          items:
            $ref: '#/components/schemas/Point'
        meta:
          $ref: '#/components/schemas/Meta'
      required:
        - data
      example:
        data:
          - timestamp: 2019-10-17T20:17:00.000Z
            metric.topic: foo
            value: 9741
          - timestamp: 2019-10-17T20:18:00.000Z
            metric.topic: foo
            value: 9246
          - timestamp: 2019-10-17T20:17:00.000Z
            metric.topic: bar
            value: 844.1
          - timestamp: 2019-10-17T20:18:00.000Z
            metric.topic: bar
            value: 821.1
        meta:
          pagination:
            page_size: 3
            total_size: 3
    GroupedQueryResponse:
      title: Grouped Response
      type: object
      properties:
        data:
          description: >-
            An array of results for this query. Each item represents a group
            bucket having a distinct set of label values for the request's
            `group_by`.  The groups are ordered lexicographically by the label
            values for that group.
          type: array
          items:
            type: object
            properties:
              points:
                type: array
                items:
                  $ref: '#/components/schemas/Point'
            additionalProperties: true
            required:
              - points
        meta:
          $ref: '#/components/schemas/Meta'
      required:
        - data
      example:
        data:
          - metric.topic: foo
            points:
              - timestamp: 2019-10-17T20:17:00.000Z
                value: 9741
              - timestamp: 2019-10-17T20:18:00.000Z
                value: 9246
          - metric.topic: bar
            points:
              - timestamp: 2019-10-17T20:17:00.000Z
                value: 844.1
              - timestamp: 2019-10-17T20:18:00.000Z
                value: 821.1
        meta:
          pagination:
            page_size: 3
            total_size: 3
    QueryResponse:
      oneOf:
        - $ref: '#/components/schemas/FlatQueryResponse'
        - $ref: '#/components/schemas/GroupedQueryResponse'
    AttributesRequest:
      type: object
      x-java-class: io.confluent.observability.metricsquery.attributes.AttributesRequest
      properties:
        metric:
          type: string
          description: The metric that the label values are enumerated for.
        group_by:
          description: The label(s) that the values are enumerated for.
          type: array
          items:
            type: string
          minItems: 1
        filter:
          $ref: '#/components/schemas/Filter'
        intervals:
          description: >-
            Defines the time range(s) for which available metrics will be
            listed. A time range is an ISO-8601 interval. When unspecified, the
            value defaults to the last hour before the request was made
          type: array
          items:
            $ref: '#/components/schemas/Interval'
          minItems: 1
        limit:
          type: integer
          minimum: 1
          maximum: 1000
          default: 100
      required:
        - group_by
    AttributesResponse:
      type: object
      properties:
        data:
          description: 'The enumerated labels, as an array of key/value pairs.'
          type: array
          items:
            description: A key/value pair for the label.
            type: object
            additionalProperties:
              type: string
            example:
              topic: foo
        meta:
          $ref: '#/components/schemas/Meta'
        links:
          $ref: '#/components/schemas/Links'
      required:
        - data
        - meta
      example:
        data:
          - metric.label.topic: foo
          - metric.label.topic: bar
          - metric.label.topic: baz
        meta:
          pagination:
            page_size: 3
            total_size: 3
  responses:
    RateLimitError:
      description: Rate Limit Exceeded