> ## Documentation Index
> Fetch the complete documentation index at: https://messenger-docs.cogfy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Send a message to a conversation



## OpenAPI

````yaml POST /conversations/{conversationId}/messages
openapi: 3.0.0
info:
  title: Cogfy Messenger Public API
  version: 1.0.0
  description: API for interacting with the Cogfy Messenger platform
servers:
  - url: https://messenger-public-api.cogfy.com
    description: Production server
  - url: http://localhost:53981
    description: Local server
security:
  - ApiKeyAuth: []
tags: []
paths:
  /conversations/{conversationId}/messages:
    post:
      tags:
        - Conversations
      summary: Send a message to a conversation
      parameters:
        - in: path
          name: conversationId
          schema:
            type: string
          required: true
          description: Conversation ID
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                content:
                  type: string
                  description: >-
                    Message content. Required for text messages, optional for
                    media messages.
                type:
                  type: string
                  enum:
                    - text
                    - image
                    - document
                  description: Message type
                media:
                  type: object
                  properties:
                    name:
                      type: string
                      description: Media file name. Optional.
                    mimeType:
                      type: string
                      description: Media MIME type. Required for media messages.
                    base64:
                      type: string
                      description: >-
                        Media file content in base64 encoding. Required for
                        media messages.
              required:
                - type
      responses:
        '201':
          description: Message sent successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    format: uuid
                    description: Message ID
        '400':
          description: Bad request
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
        '404':
          description: Conversation not found
        '500':
          description: Internal server error
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: api-key

````