openapi: 3.1.0
info:
  title: Google Cloud Pub/Sub API
  description: >-
    The Cloud Pub/Sub API provides reliable, many-to-many, asynchronous messaging
    between applications. Publishers send messages to topics, and subscribers receive
    messages via subscriptions. It supports both push and pull delivery modes.
  version: v1
  contact:
    name: Google Cloud
    url: https://cloud.google.com/pubsub
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
externalDocs:
  description: Google Cloud Pub/Sub Documentation
  url: https://cloud.google.com/pubsub/docs/reference/rest
servers:
  - url: https://pubsub.googleapis.com/v1
    description: Google Cloud Pub/Sub API v1
security:
  - oauth2: []
tags:
  - name: Schemas
    description: Operations for managing Pub/Sub schemas
  - name: Subscriptions
    description: Operations for managing Pub/Sub subscriptions
  - name: Topics
    description: Operations for managing Pub/Sub topics
paths:
  /projects/{projectId}/topics:
    get:
      operationId: listTopics
      summary: Google Cloud Pub/Sub List topics
      description: Lists matching topics in the given project.
      tags:
        - Topics
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: pageSize
          in: query
          schema:
            type: integer
        - name: pageToken
          in: query
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListTopicsResponse'
  /projects/{projectId}/topics/{topicId}:
    get:
      operationId: getTopic
      summary: Google Cloud Pub/Sub Get a topic
      description: Gets the configuration of a topic.
      tags:
        - Topics
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: topicId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Topic'
    put:
      operationId: createTopic
      summary: Google Cloud Pub/Sub Create a topic
      description: Creates the given topic with the given name.
      tags:
        - Topics
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: topicId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Topic'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Topic'
    delete:
      operationId: deleteTopic
      summary: Google Cloud Pub/Sub Delete a topic
      description: Deletes the topic with the given name.
      tags:
        - Topics
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: topicId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
  /projects/{projectId}/topics/{topicId}:publish:
    post:
      operationId: publishMessages
      summary: Google Cloud Pub/Sub Publish messages
      description: Adds one or more messages to the topic.
      tags:
        - Topics
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: topicId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                messages:
                  type: array
                  items:
                    $ref: '#/components/schemas/PubsubMessage'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  messageIds:
                    type: array
                    items:
                      type: string
  /projects/{projectId}/subscriptions:
    get:
      operationId: listSubscriptions
      summary: Google Cloud Pub/Sub List subscriptions
      description: Lists matching subscriptions in the given project.
      tags:
        - Subscriptions
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: pageSize
          in: query
          schema:
            type: integer
        - name: pageToken
          in: query
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListSubscriptionsResponse'
  /projects/{projectId}/subscriptions/{subscriptionId}:
    get:
      operationId: getSubscription
      summary: Google Cloud Pub/Sub Get a subscription
      description: Gets the configuration details of a subscription.
      tags:
        - Subscriptions
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: subscriptionId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Subscription'
    put:
      operationId: createSubscription
      summary: Google Cloud Pub/Sub Create a subscription
      description: Creates a subscription to a given topic.
      tags:
        - Subscriptions
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: subscriptionId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Subscription'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Subscription'
    delete:
      operationId: deleteSubscription
      summary: Google Cloud Pub/Sub Delete a subscription
      description: Deletes an existing subscription.
      tags:
        - Subscriptions
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: subscriptionId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
  /projects/{projectId}/subscriptions/{subscriptionId}:pull:
    post:
      operationId: pullMessages
      summary: Google Cloud Pub/Sub Pull messages
      description: Pulls messages from the server.
      tags:
        - Subscriptions
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: subscriptionId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                maxMessages:
                  type: integer
                  description: Required. Maximum number of messages to return.
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  receivedMessages:
                    type: array
                    items:
                      $ref: '#/components/schemas/ReceivedMessage'
  /projects/{projectId}/subscriptions/{subscriptionId}:acknowledge:
    post:
      operationId: acknowledgeMessages
      summary: Google Cloud Pub/Sub Acknowledge messages
      description: Acknowledges the messages associated with the ack IDs in the request.
      tags:
        - Subscriptions
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: subscriptionId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                ackIds:
                  type: array
                  items:
                    type: string
      responses:
        '200':
          description: Successful response
  /projects/{projectId}/schemas:
    get:
      operationId: listSchemas
      summary: Google Cloud Pub/Sub List schemas
      description: Lists schemas in a project.
      tags:
        - Schemas
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: pageSize
          in: query
          schema:
            type: integer
        - name: pageToken
          in: query
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListSchemasResponse'
    post:
      operationId: createSchema
      summary: Google Cloud Pub/Sub Create a schema
      description: Creates a schema in a project.
      tags:
        - Schemas
      parameters:
        - name: projectId
          in: path
          required: true
          schema:
            type: string
        - name: schemaId
          in: query
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Schema'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Schema'
components:
  securitySchemes:
    oauth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://accounts.google.com/o/oauth2/auth
          tokenUrl: https://oauth2.googleapis.com/token
          scopes:
            https://www.googleapis.com/auth/pubsub: View and manage Pub/Sub topics and subscriptions
            https://www.googleapis.com/auth/cloud-platform: Full access to Google Cloud Platform
  schemas:
    Topic:
      type: object
      properties:
        name:
          type: string
          description: The name of the topic in the format projects/{project}/topics/{topic}.
        labels:
          type: object
          additionalProperties:
            type: string
        messageStoragePolicy:
          type: object
          properties:
            allowedPersistenceRegions:
              type: array
              items:
                type: string
        kmsKeyName:
          type: string
          description: The resource name of the Cloud KMS key to protect access to messages.
        schemaSettings:
          type: object
          properties:
            schema:
              type: string
            encoding:
              type: string
              enum:
                - ENCODING_UNSPECIFIED
                - JSON
                - BINARY
            firstRevisionId:
              type: string
            lastRevisionId:
              type: string
        satisfiesPzs:
          type: boolean
        messageRetentionDuration:
          type: string
          description: Duration for message retention, in seconds format (e.g. 86400s).
    Subscription:
      type: object
      properties:
        name:
          type: string
          description: The name of the subscription.
        topic:
          type: string
          description: The name of the topic from which this subscription receives messages.
        pushConfig:
          type: object
          properties:
            pushEndpoint:
              type: string
            attributes:
              type: object
              additionalProperties:
                type: string
            oidcToken:
              type: object
              properties:
                serviceAccountEmail:
                  type: string
                audience:
                  type: string
        ackDeadlineSeconds:
          type: integer
          description: The approximate amount of time Pub/Sub waits for acknowledgment.
        retainAckedMessages:
          type: boolean
        messageRetentionDuration:
          type: string
        labels:
          type: object
          additionalProperties:
            type: string
        enableMessageOrdering:
          type: boolean
        expirationPolicy:
          type: object
          properties:
            ttl:
              type: string
        filter:
          type: string
          description: Expression to filter messages.
        deadLetterPolicy:
          type: object
          properties:
            deadLetterTopic:
              type: string
            maxDeliveryAttempts:
              type: integer
        retryPolicy:
          type: object
          properties:
            minimumBackoff:
              type: string
            maximumBackoff:
              type: string
        detached:
          type: boolean
        enableExactlyOnceDelivery:
          type: boolean
        state:
          type: string
          enum:
            - STATE_UNSPECIFIED
            - ACTIVE
            - RESOURCE_ERROR
    PubsubMessage:
      type: object
      properties:
        data:
          type: string
          description: The message data field (base64-encoded).
        attributes:
          type: object
          additionalProperties:
            type: string
        messageId:
          type: string
          description: Output only. ID of this message.
        publishTime:
          type: string
          format: date-time
          description: Output only. The time at which the message was published.
        orderingKey:
          type: string
    ReceivedMessage:
      type: object
      properties:
        ackId:
          type: string
        message:
          $ref: '#/components/schemas/PubsubMessage'
        deliveryAttempt:
          type: integer
    Schema:
      type: object
      properties:
        name:
          type: string
        type:
          type: string
          enum:
            - TYPE_UNSPECIFIED
            - PROTOCOL_BUFFER
            - AVRO
        definition:
          type: string
        revisionId:
          type: string
        revisionCreateTime:
          type: string
          format: date-time
    ListTopicsResponse:
      type: object
      properties:
        topics:
          type: array
          items:
            $ref: '#/components/schemas/Topic'
        nextPageToken:
          type: string
    ListSubscriptionsResponse:
      type: object
      properties:
        subscriptions:
          type: array
          items:
            $ref: '#/components/schemas/Subscription'
        nextPageToken:
          type: string
    ListSchemasResponse:
      type: object
      properties:
        schemas:
          type: array
          items:
            $ref: '#/components/schemas/Schema'
        nextPageToken:
          type: string