---
title: "Create MCP Server"
method: POST
path: "/ai/mcp_servers"
tags: ["MCP Servers"]
---

# Create MCP Server

`POST /ai/mcp_servers`

Creates a new MCP server configuration on your account and returns the created server.

## Headers

- `Idempotency-Key` string

## Request body

- CreateMCPServerRequest
  - `name` string, required
  - `type` string, required
  - `url` string, required
  - `api_key_ref` string, nullable
  - `allowed_tools` string[], nullable

## Response `200`

Successful Response

- MCPServer
  - `id` string, required
  - `name` string, required
  - `type` string, required
  - `url` string, required
  - `api_key_ref` string, nullable
  - `allowed_tools` string[], nullable
  - `created_at` string, date-time, required

## Other responses

- `400` — Bad Request / Validation Failed (10015). Invalid, duplicate, empty, malformed, or overlong Idempotency-Key headers are rejected by Edge with HTTP 400 and error code 10015.
- `409` — A request with the same Idempotency-Key is still being processed (10036). Retry later with the same key and request.
- `413` — Payload Too Large. A request sent with an Idempotency-Key whose body exceeds the endpoint's Edge replay-protection limit (256 KB) is rejected before it reaches the service. Requests sent without the header are not subject to this limit.
- `422` — Validation Error. Reusing an Idempotency-Key with a different request body also returns 422 with error code 10027.
- `503` — Service unavailable (10016), including unavailable Edge idempotency protection for a keyed request.

## Changes

> 81 revisions in range; 1 not diffed.

- **2026-09-22** `9621f6123ebc` — 2 warning
  - added the new `10011` enum value to the `errors/items/code` response property for the response status `409`
  - added the new `domain_graduation_limit_exceeded` enum value to the `errors/items/code` response property for the response status `409`
- **2026-09-16** `a6a61a29ecdd` — 1 breaking, 1 warning, 6 info
  - the response's body type changed from `object` to no type for status `422`
  - removed the optional property `detail` from the response with the `422` status
  - added the new optional `header` request parameter `Idempotency-Key`
  - added `#/components/schemas/HTTPValidationError, #/components/schemas/inference-embedding_ErrorResponse` to the response body `anyOf` list for the response status `422`
  - …4 more

[Change history](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/changes/ai/mcp_servers/post.md)

---

[API](https://skmtc.dev/team-telnyx/apis/telnyx-api-2.md) · [All operations](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/llms.txt) · [OpenAPI document](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/revisions/f6e9ed754d05?raw)