Dapr Pub/Sub Messaging API

asyncapi: 2.6.0
info:
  title: Dapr Pub/Sub Messaging API
  version: 1.0.0
  description: >-
    The Dapr Pub/Sub AsyncAPI defines the event-driven messaging interfaces
    for Dapr publish and subscribe operations. Applications publish events
    to topics and subscribe to receive events using the CloudEvents 1.0
    specification format. Dapr supports pluggable pub/sub components
    including Kafka, RabbitMQ, Redis Streams, Azure Service Bus, AWS SNS/SQS,
    GCP Pub/Sub, and more.
  contact:
    name: Dapr
    url: https://dapr.io
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
  externalDocs:
    description: Dapr Pub/Sub API Reference
    url: https://docs.dapr.io/reference/api/pubsub_api/
servers:
  dapr-sidecar:
    url: localhost:3500
    protocol: http
    description: >-
      Dapr sidecar HTTP endpoint for publishing events. The sidecar handles
      routing messages to the configured pub/sub component.
channels:
  publish:
    description: >-
      Channel for publishing events to a topic on a named pub/sub component.
      The Dapr sidecar wraps payloads in CloudEvents format unless raw payload
      mode is enabled.
    publish:
      operationId: publishEvent
      summary: Publish Event
      description: >-
        Publishes an event to the specified topic. If content type is not
        application/cloudevents+json, the payload is automatically wrapped
        in a CloudEvent envelope by the Dapr sidecar.
      message:
        $ref: '#/components/messages/CloudEvent'
      tags:
        - name: PubSub
        - name: Messaging
  subscribe:
    description: >-
      Channel for receiving events from subscribed topics. Dapr delivers
      events to application endpoints based on programmatic or declarative
      subscription configurations.
    subscribe:
      operationId: receiveEvent
      summary: Receive Event
      description: >-
        Receives an event from a subscribed topic. Events are delivered in
        CloudEvents format to the application endpoint registered for the
        topic subscription.
      message:
        $ref: '#/components/messages/CloudEvent'
      tags:
        - name: PubSub
        - name: Messaging
  bulk-publish:
    description: >-
      Channel for publishing multiple events to a topic in a single request.
      Supports partial failure reporting for individual entries.
    publish:
      operationId: bulkPublishEvents
      summary: Bulk Publish Events
      description: >-
        Publishes multiple events to the specified topic in a single
        operation. Each entry includes an entryId, event data, and optional
        content type and metadata.
      message:
        $ref: '#/components/messages/BulkPublishEntry'
      tags:
        - name: PubSub
        - name: Messaging
        - name: Bulk
components:
  messages:
    CloudEvent:
      name: CloudEvent
      title: CloudEvent Message
      summary: >-
        A message conforming to the CloudEvents 1.0 specification used
        for all Dapr pub/sub event payloads.
      contentType: application/cloudevents+json
      payload:
        $ref: '#/components/schemas/CloudEvent'
    BulkPublishEntry:
      name: BulkPublishEntry
      title: Bulk Publish Entry
      summary: >-
        A single entry in a bulk publish request containing the event data
        and metadata.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/BulkPublishEntry'
  schemas:
    CloudEvent:
      type: object
      description: >-
        CloudEvents 1.0 specification envelope used by Dapr for pub/sub
        messaging. All published events are wrapped in this format unless
        raw payload mode is enabled.
      required:
        - specversion
        - type
        - source
        - id
      properties:
        specversion:
          type: string
          description: The version of the CloudEvents specification (1.0).
          enum:
            - '1.0'
        type:
          type: string
          description: The type of the event.
        source:
          type: string
          description: The source of the event.
        id:
          type: string
          description: Unique identifier for the event.
        subject:
          type: string
          description: The subject of the event in context of the producer.
        time:
          type: string
          format: date-time
          description: Timestamp of when the event occurred.
        datacontenttype:
          type: string
          description: Content type of the data attribute.
        data:
          description: The event payload data.
        topic:
          type: string
          description: The topic the event is published to.
        pubsubname:
          type: string
          description: The name of the pub/sub component.
        traceid:
          type: string
          description: The distributed tracing identifier.
        traceparent:
          type: string
          description: The W3C trace context traceparent header value.
        tracestate:
          type: string
          description: The W3C trace context tracestate header value.
    BulkPublishEntry:
      type: object
      description: A single entry in a bulk publish request.
      required:
        - entryId
        - event
      properties:
        entryId:
          type: string
          description: Unique identifier for the entry.
        event:
          description: The event data payload.
        contentType:
          type: string
          description: Content type of the event data.
        metadata:
          type: object
          additionalProperties:
            type: string
          description: Additional metadata for the entry.