---
title: "Call Mcp App Tool"
method: POST
path: "/api/chats/{chat_id}/mcp-apps/tools-call"
tags: ["chats"]
---

# Call Mcp App Tool

`POST /api/chats/{chat_id}/mcp-apps/tools-call`

## Request

- Base URL: `https://app.thinqos.com` (the document declares no server; this is the origin it was published from)
- URL: `https://app.thinqos.com/api/chats/{chat_id}/mcp-apps/tools-call`
- Auth: none declared

Run a tool a widget asked for (MCP Apps ``tools/call``); returns a CallToolResult.

## Path parameters

- `chat_id` string, uuid, required

## Headers

- `x-impersonate-identity-id` string, nullable

## Request body

- McpAppToolCall
  - `message_id` string, uuid, required
  - `artifact_index` integer, required
  - `name` string, required
  - `arguments` object

## Response `200`

Successful Response

- object

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/thinqos/apis/thinqos-api.md) · [All operations](https://skmtc.dev/thinqos/apis/thinqos-api/llms.txt) · [OpenAPI document](https://skmtc.dev/thinqos/apis/thinqos-api/revisions/ce2c2ce318b1?raw)