openapi: 3.1.0
info:
  title: Boomi Event Streams REST API
  description: >-
    The Boomi Event Streams REST API enables HTTP-based applications to produce
    messages to event topics. It supports two operational modes: multiple
    messages in a predefined JSON format, and single messages in their original
    format without transformation. The API accommodates messages up to 5 MB and
    enforces a rate limit of 60,000 requests per IP per 5-minute window. Each
    topic has a unique REST API URL available in the Event Streams UI.
    Authentication uses an Environment Token as a Bearer token.
  version: '1.0'
  contact:
    name: Boomi Support
    url: https://community.boomi.com/s/support
  termsOfService: https://boomi.com/legal/service/
externalDocs:
  description: Boomi Event Streams REST API Documentation
  url: https://help.boomi.com/docs/Atomsphere/Event%20Streams/es-REST_API
servers:
  - url: https://{topicEndpoint}
    description: >-
      Topic-specific endpoint URL. Each event topic has a unique REST API URL
      obtained from the Event Streams UI in the Boomi platform.
    variables:
      topicEndpoint:
        description: The unique hostname for this event topic's REST endpoint.
        default: your-topic-endpoint.boomi.com
tags:
  - name: Messages
    description: >-
      Endpoints for producing messages to Boomi Event Streams topics via
      HTTP REST calls.
security:
  - bearerAuth: []
paths:
  /:
    post:
      operationId: publishMessages
      summary: Boomi Publish messages to a topic
      description: >-
        Publishes one or more messages to the event topic. Supports two
        operational modes: multiple messages mode (predefined JSON format with
        payload and properties fields) and single message mode (original format
        in plain text, JSON, or XML). Messages may be up to 5 MB each and the
        total HTTP request must not exceed 10 MB. Rate limited to 60,000
        requests per IP per 5-minute window.
      tags:
        - Messages
      requestBody:
        required: true
        content:
          application/json:
            schema:
              oneOf:
                - $ref: '#/components/schemas/MultiMessageRequest'
                - $ref: '#/components/schemas/SingleMessageRequest'
          text/plain:
            schema:
              type: string
              description: Single message payload in plain text format.
          application/xml:
            schema:
              type: string
              description: Single message payload in XML format.
      responses:
        '200':
          description: Messages accepted and published successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PublishResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '413':
          description: Payload too large. Maximum message size is 5 MB.
        '429':
          description: >-
            Rate limit exceeded. Maximum 60,000 requests per IP per
            5-minute window.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        Environment Token obtained from the Boomi Event Streams UI. Include as
        Authorization: Bearer {environment_token}.
  responses:
    Unauthorized:
      description: Authentication token is missing or invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: The request payload is invalid or malformed.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  schemas:
    MultiMessageRequest:
      type: object
      description: >-
        Request body for publishing multiple messages in the predefined JSON
        format. Each message contains a payload and optional properties.
      required: [messages]
      properties:
        messages:
          type: array
          description: Array of messages to publish to the topic.
          items:
            $ref: '#/components/schemas/MessageItem'
    MessageItem:
      type: object
      description: A single message in multi-message mode.
      required: [payload]
      properties:
        payload:
          type: string
          description: >-
            The message content. May be plain text, JSON, or XML encoded
            as a string.
        properties:
          type: object
          description: >-
            Optional custom metadata key-value pairs associated with
            this message.
          additionalProperties:
            type: string
    SingleMessageRequest:
      type: object
      description: >-
        Request body for publishing a single message in its original format.
        Properties are sent via request headers prefixed with x-msg-props-.
      additionalProperties: true
    PublishResponse:
      type: object
      description: Response returned after successfully publishing messages.
      properties:
        status:
          type: string
          description: Status of the publish operation.
          example: success
        messageIds:
          type: string
          description: >-
            Comma-separated list of message IDs assigned to the
            published messages.
    ErrorResponse:
      type: object
      description: Standard error response.
      properties:
        message:
          type: string
          description: Human-readable error message.