---
title: "Join AI Assistant Conversation"
method: POST
path: "/calls/{call_control_id}/actions/ai_assistant_join"
tags: ["Call Commands"]
---

# Join AI Assistant Conversation

`POST /calls/{call_control_id}/actions/ai_assistant_join`

Add a participant to an existing AI assistant conversation. Use this command to bring an additional call leg into a running AI conversation.

## Path parameters

- `call_control_id` string, required

## Request body

- AIAssistantJoinRequest
  - `conversation_id` string, required — The ID of the AI assistant conversation to join.
  - `participant` AIAssistantJoinParticipant, required
    - `id` string, required — The call_control_id of the participant to add to the conversation.
    - `role` 'user', required — The role of the participant in the conversation.
    - `name` string — Display name for the participant.
    - `on_hangup` 'continue_conversation' | 'end_conversation' — Determines what happens to the conversation when this participant hangs up.
  - `client_state` string — Use this field to add state to every subsequent webhook. It must be a valid Base-64 encoded string.
  - `command_id` string — Use this field to avoid duplicate commands. Telnyx will ignore any command with the same `command_id` for the same `call_control_id`.

## Response `200`

Successful response upon making a call control command that includes conversation_id.

- object
  - `data` CallControlCommandResultWithConversationId
    - `result` string
    - `conversation_id` string, uuid — The ID of the conversation created by the command.

## Other responses

- `422` — Unprocessable entity. The request was well-formed but could not be processed due to semantic errors. This includes validation errors, invalid parameter values, call state errors, conference errors, queue errors, recording/transcription errors, and business logic violations.
- `default` — Unexpected error

---

[API](https://skmtc.net/team-telnyx/apis/telnyx-api.md) · [All operations](https://skmtc.net/team-telnyx/apis/telnyx-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/team-telnyx/telnyx-api/versions/e32d46c5945b/schema)