openapi: 3.1.0
info:
  title: IBM MQ Administration REST Channels Topic Messaging API
  description: REST API for administering and monitoring IBM MQ queue managers, queues, topics, subscriptions, and channels. Provides programmatic access to manage MQ objects and retrieve status information.
  version: '2.0'
  contact:
    name: IBM Support
    url: https://www.ibm.com/mysupport
    email: support@ibm.com
  license:
    name: IBM License
    url: https://www.ibm.com/terms
servers:
- url: https://{host}:{port}/ibmmq/rest/v2
  description: IBM MQ REST API v2
  variables:
    host:
      default: localhost
      description: Hostname of the MQ web server
    port:
      default: '9443'
      description: HTTPS port of the MQ web server
security:
- basicAuth: []
- tokenAuth: []
tags:
- name: Topic Messaging
  description: Publish messages to topics
paths:
  /messaging/qmgr/{qmgrName}/topic/{topicString}/message:
    post:
      operationId: publishMessageToTopic
      summary: IBM MQ Publish a message to a topic
      description: Publish a message to the specified topic string. All active subscribers to the topic will receive the message.
      tags:
      - Topic Messaging
      parameters:
      - $ref: '#/components/parameters/qmgrName'
      - name: topicString
        in: path
        required: true
        description: The topic string to publish to (URL-encoded)
        schema:
          type: string
      - $ref: '#/components/parameters/ibmMqRestCsrfToken'
      - name: ibm-mq-md-correlationId
        in: header
        description: Correlation ID for the message
        schema:
          type: string
      - name: ibm-mq-md-expiry
        in: header
        description: Message expiry time in tenths of a second
        schema:
          type: integer
      - name: ibm-mq-md-persistence
        in: header
        description: Message persistence
        schema:
          type: string
          enum:
          - persistent
          - nonPersistent
      requestBody:
        required: true
        content:
          text/plain:
            schema:
              type: string
          application/json:
            schema:
              type: object
          application/xml:
            schema:
              type: string
          application/octet-stream:
            schema:
              type: string
              format: binary
      responses:
        '201':
          description: Message published successfully
          headers:
            ibm-mq-md-messageId:
              description: Message ID of the published message
              schema:
                type: string
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          description: Queue manager not found
components:
  responses:
    Unauthorized:
      description: Authentication required or credentials invalid
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BadRequest:
      description: Invalid request parameters or body
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    ibmMqRestCsrfToken:
      name: ibm-mq-rest-csrf-token
      in: header
      required: false
      description: CSRF token required for state-changing operations
      schema:
        type: string
    qmgrName:
      name: qmgrName
      in: path
      required: true
      description: Name of the queue manager
      schema:
        type: string
  schemas:
    Error:
      type: object
      properties:
        error:
          type: array
          items:
            type: object
            properties:
              type:
                type: string
                description: Error type
              msgId:
                type: string
                description: Message identifier
              explanation:
                type: string
                description: Explanation of the error
              action:
                type: string
                description: Suggested action
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic authentication with MQ user credentials
    tokenAuth:
      type: apiKey
      in: cookie
      name: LtpaToken2
      description: LTPA token-based authentication via login endpoint
externalDocs:
  description: IBM MQ REST API Documentation
  url: https://www.ibm.com/docs/en/ibm-mq/latest?topic=api-rest