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

> Add a participant to an existing conversation so they can receive and send messages.

# Add participant to conversation



## OpenAPI

````yaml post /v1/messaging/conversations/{conversationUid}/participants
openapi: 3.0.0
info:
  title: Partner API
  description: Public API for partner integrations
  version: '1.0'
  contact: {}
servers:
  - url: https://api-staging.respondent.io
security: []
tags: []
paths:
  /v1/messaging/conversations/{conversationUid}/participants:
    post:
      tags:
        - messaging
      summary: Add participant to conversation
      operationId: ConversationsController_addParticipant
      parameters:
        - name: x-api-key
          in: header
          required: true
          schema:
            type: string
        - name: x-api-secret
          in: header
          required: true
          schema:
            type: string
        - name: conversationUid
          required: true
          in: path
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AddParticipantDto'
      responses:
        '201':
          description: ''
components:
  schemas:
    AddParticipantDto:
      type: object
      properties:
        participantUserId:
          type: string
          description: User ID of the participant to add.
          format: ObjectId
      required:
        - participantUserId

````