---
title: "Add User To Conversation"
method: POST
path: "/api/conversation/{conversation_ext_id}/user"
tags: ["conversation"]
---

# Add User To Conversation

`POST /api/conversation/{conversation_ext_id}/user`

Add a user to a conversation.

RLS ensures the user can only add users to conversations they have access to.
PostgreSQL constraints handle duplicate users.

## Path parameters

- `conversation_ext_id` string, required

## Request body

- AddUserToConversationRequest
  - `user_ext_id` string, required

## Response `200`

Successful Response

- AddUserToConversationResponse
  - `detail` string

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/arbicity/apis/arbi.md) · [All operations](https://skmtc.dev/arbicity/apis/arbi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/arbicity/arbi/revisions/1f956ac3d1c1/schema)