openapi: 3.1.0
info:
  title: Google Pub/Sub Google Cloud Pub/Sub Publish Topics API
  description: Provides reliable, many-to-many, asynchronous messaging between applications. The Pub/Sub API allows you to create and manage topics and subscriptions, publish messages, and pull or push messages to subscribers.
  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
servers:
- url: https://pubsub.googleapis.com
  description: Google Cloud Pub/Sub API
security:
- oauth2:
  - https://www.googleapis.com/auth/pubsub
- bearerAuth: []
tags:
- name: Topics
  description: Manage Pub/Sub topics
paths:
  /v1/projects/{project}/topics:
    get:
      operationId: listTopics
      summary: Google Pub/Sub List topics
      description: Lists matching topics in the given project.
      tags:
      - Topics
      parameters:
      - name: project
        in: path
        required: true
        description: The project ID (e.g., projects/my-project).
        schema:
          type: string
      - name: pageSize
        in: query
        description: Maximum number of topics to return.
        schema:
          type: integer
      - name: pageToken
        in: query
        description: Token for pagination.
        schema:
          type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListTopicsResponse'
  /v1/projects/{project}/topics/{topic}:
    get:
      operationId: getTopic
      summary: Google Pub/Sub Get a topic
      description: Gets the configuration of a topic.
      tags:
      - Topics
      parameters:
      - name: project
        in: path
        required: true
        schema:
          type: string
      - name: topic
        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 Pub/Sub Create a topic
      description: Creates the given topic with the given name. The topic name must be unique within the project.
      tags:
      - Topics
      parameters:
      - name: project
        in: path
        required: true
        schema:
          type: string
      - name: topic
        in: path
        required: true
        schema:
          type: string
      requestBody:
        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 Pub/Sub Delete a topic
      description: Deletes the topic with the given name. Existing subscriptions to this topic are not deleted but their topic field is set to _deleted-topic_.
      tags:
      - Topics
      parameters:
      - name: project
        in: path
        required: true
        schema:
          type: string
      - name: topic
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Successful response
  /v1/{topic}:
    patch:
      operationId: updateTopic
      summary: Google Pub/Sub Update a topic
      description: Updates an existing topic by updating the fields specified in the update mask.
      tags:
      - Topics
      parameters:
      - name: topic
        in: path
        required: true
        description: The name of the topic (e.g., projects/my-project/topics/my-topic).
        schema:
          type: string
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                topic:
                  $ref: '#/components/schemas/Topic'
                updateMask:
                  type: string
                  description: Fields to update.
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Topic'
components:
  schemas:
    Topic:
      type: object
      properties:
        name:
          type: string
          description: The name of the topic (e.g., projects/my-project/topics/my-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 use for message encryption.
        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: Message retention duration (e.g., 604800s for 7 days).
        state:
          type: string
          enum:
          - STATE_UNSPECIFIED
          - ACTIVE
          - INGESTION_RESOURCE_ERROR
    ListTopicsResponse:
      type: object
      properties:
        topics:
          type: array
          items:
            $ref: '#/components/schemas/Topic'
        nextPageToken:
          type: string
  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: Manage Pub/Sub resources
            https://www.googleapis.com/auth/cloud-platform: Full access to Google Cloud
    bearerAuth:
      type: http
      scheme: bearer