Salesforce Platform Events API

asyncapi: 2.6.0
info:
  title: Salesforce Platform Events API
  description: >-
    Salesforce Platform Events enables event-driven integration architectures
    on the Salesforce platform. Developers define custom event types as Salesforce
    objects with the __e suffix and publish or subscribe to events using the REST
    API, Apex triggers, or CometD subscriptions. Events are durable and stored for
    72 hours, supporting replay for missed events.
  version: '59.0'
  contact:
    name: Salesforce Developer Support
    url: https://developer.salesforce.com/docs/atlas.en-us.platform_events.meta/platform_events/
  termsOfService: https://www.salesforce.com/company/legal/agreements/
servers:
  salesforce-cometd:
    url: 'https://{instanceName}.salesforce.com/cometd/{apiVersion}'
    protocol: https
    description: CometD endpoint for subscribing to Platform Events
    variables:
      instanceName:
        description: Salesforce org instance name or custom domain
        default: myorg
      apiVersion:
        description: Salesforce API version
        default: '59.0'
    security:
      - oauthAccessToken: []
  salesforce-pubsub:
    url: 'api.pubsub.salesforce.com:443'
    protocol: grpc
    description: Pub/Sub API gRPC endpoint (recommended for high-throughput subscriptions)
    security:
      - oauthAccessToken: []
channels:
  /event/{platformEventApiName}:
    description: >-
      CometD channel for subscribing to a Platform Event type. Receives events
      published to this event type from Apex triggers, flows, REST API calls,
      or external systems via the REST API.
    parameters:
      platformEventApiName:
        description: >-
          The API name of the Platform Event object including the __e suffix
          (e.g., Order_Event__e, Low_Ink__e)
        schema:
          type: string
          pattern: '^[a-zA-Z][a-zA-Z0-9_]*__e$'
          examples:
            - Order_Event__e
            - Low_Ink__e
    subscribe:
      operationId: receivePlatformEvent
      summary: Receive a Platform Event notification
      description: >-
        Fired when a Platform Event of this type is published. Includes the
        event payload fields defined in the custom Platform Event object definition
        plus system-generated metadata fields.
      message:
        $ref: '#/components/messages/PlatformEventMessage'
    publish:
      operationId: publishPlatformEvent
      summary: Publish a Platform Event via CometD (internal use)
      description: >-
        Platform Events are typically published via the Salesforce REST API
        (POST to /sobjects/{EventApiName__e}) or from Apex code. This represents
        the event structure for publishing.
      message:
        $ref: '#/components/messages/PlatformEventPublishMessage'
components:
  securitySchemes:
    oauthAccessToken:
      type: oauth2
      description: Salesforce OAuth 2.0 Connected App access token
      flows:
        authorizationCode:
          authorizationUrl: https://login.salesforce.com/services/oauth2/authorize
          tokenUrl: https://login.salesforce.com/services/oauth2/token
          scopes:
            api: Access and manage Salesforce data
            event_api: Subscribe and publish Platform Events
  messages:
    PlatformEventMessage:
      name: PlatformEventMessage
      title: Salesforce Platform Event
      summary: A Platform Event notification received via CometD
      contentType: application/json
      payload:
        $ref: '#/components/schemas/PlatformEventEnvelope'
    PlatformEventPublishMessage:
      name: PlatformEventPublish
      title: Platform Event Publish Payload
      summary: Payload structure for publishing a Platform Event via REST API
      contentType: application/json
      payload:
        $ref: '#/components/schemas/PlatformEventPublishPayload'
  schemas:
    PlatformEventEnvelope:
      type: object
      description: The CometD envelope wrapping a received Platform Event
      properties:
        channel:
          type: string
          description: CometD channel path
          examples:
            - /event/Low_Ink__e
        data:
          type: object
          description: Event data container
          properties:
            schema:
              type: string
              description: The Avro schema ID for this event type version
            event:
              $ref: '#/components/schemas/PlatformEventData'
            payload:
              type: object
              description: >-
                The event payload containing the custom fields defined on
                the Platform Event object, plus standard fields.
              additionalProperties: true
    PlatformEventData:
      type: object
      description: Event metadata
      properties:
        replayId:
          type: integer
          description: >-
            Durable replay ID. Use -1 to replay from the earliest retained event,
            -2 for only new events, or a specific replayId to replay from that point.
        createdDate:
          type: string
          format: date-time
          description: ISO 8601 timestamp when the event was published
        createdById:
          type: string
          description: Salesforce user ID of the publisher
    PlatformEventPublishPayload:
      type: object
      description: >-
        Payload for publishing a Platform Event via POST to
        /services/data/v{version}/sobjects/{EventApiName__e}
      properties:
        CreatedDate:
          type: string
          format: date-time
          description: Optional publication timestamp. Defaults to current time.
        CreatedById:
          type: string
          description: Optional publisher identity override (requires special permission)
      additionalProperties:
        description: Custom fields defined on the Platform Event object (field API names)
        oneOf:
          - type: string
          - type: number
          - type: boolean