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

# Send message in conversation



## OpenAPI

````yaml /api-reference/openapi.json post /api/v1/platforms/{platform}/conversations/{conversationId}/messages
openapi: 3.1.0
info:
  title: Optareach Public API
  version: 1.0.0
  description: >-
    Platform-first API surface for accounts, prospects, campaigns, inbox,
    tracked searches, AI rooms, jobs, workspaces, analytics, billing, profile,
    and knowledge bases.
servers:
  - url: /
    description: Current environment
security: []
tags:
  - name: Meta
    description: API metadata and discovery
  - name: Platforms
    description: Platform registry and capabilities
  - name: Accounts
    description: Connected sender accounts
  - name: Prospects
    description: Prospect lists and leads
  - name: Campaigns
    description: Campaign lifecycle and performance
  - name: Inbox
    description: Conversations and messages
  - name: TrackedSearches
    description: Mentions and tracked search streams
  - name: AI
    description: AI chat rooms and enrichment
  - name: Jobs
    description: Background jobs
  - name: Workspaces
    description: Workspace management
  - name: KnowledgeBases
    description: Knowledge base management
  - name: Analytics
    description: Global dashboard metrics
  - name: Billing
    description: Subscriptions and credits
  - name: Profile
    description: Current user profile
  - name: Tags
    description: Conversation tags
  - name: Notifications
    description: Notification feed
paths:
  /api/v1/platforms/{platform}/conversations/{conversationId}/messages:
    post:
      tags:
        - Inbox
      summary: Send message in conversation
      parameters:
        - $ref: '#/components/parameters/platform'
        - $ref: '#/components/parameters/conversationId'
      requestBody:
        description: Message payload
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SendMessageRequest'
            example:
              body: Happy to share examples. Are you open next Tuesday?
      responses:
        '200':
          description: Message sent
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    $ref: '#/components/schemas/Message'
                required:
                  - data
              example:
                data:
                  id: msg_124
                  conversationId: acc_linkedin_primary:prospect_target_123
                  direction: outbound
                  body: Happy to share examples. Are you open next Tuesday?
                  sentAt: '2026-03-21T10:45:00.000Z'
                  status: sent
components:
  parameters:
    platform:
      name: platform
      in: path
      required: true
      schema:
        type: string
    conversationId:
      name: conversationId
      in: path
      required: true
      schema:
        type: string
        description: 'Composite key: accountId:prospectTargetId'
  schemas:
    SendMessageRequest:
      type: object
      properties:
        body:
          type: string
      required:
        - body
    Message:
      type: object
      properties:
        id:
          type: string
        conversationId:
          type: string
        direction:
          type: string
        body:
          type: string
        sentAt:
          type: string
          format: date-time
        status:
          type: string
      required:
        - id
        - conversationId
        - direction
        - body

````