---
title: "Create MCP server"
method: POST
path: "/v1/mcp_server"
tags: ["McpServers"]
---

# Create MCP server

`POST /v1/mcp_server`

## Request

- Base URL: `https://api.braintrust.dev`
- URL: `https://api.braintrust.dev/v1/mcp_server`
- Auth: one of:
  - HTTP bearer
  - none

Create a new MCP server. If there is an existing MCP server with the same name as the one specified in the request, will return the existing MCP server unmodified

## Request body

- CreateMCPServer
  - `project_id` string, uuid, required: Unique identifier for the project that the MCP server belongs under
  - `name` string, required: Name of the MCP server. Within a project, MCP server names are unique
  - `description` string, nullable: Textual description of the MCP server
  - `url` string, required: URL of the MCP server endpoint

## Response `200`

Returns the new MCP server object

- MCPServer
  - `id` string, uuid, required: Unique identifier for the MCP server
  - `project_id` string, uuid, required: Unique identifier for the project that the MCP server belongs under
  - `user_id` string, uuid, nullable: Identifies the user who created the MCP server
  - `created` string, date-time, nullable: Date of MCP server creation
  - `deleted_at` string, date-time, nullable: Date of MCP server deletion, or null if the MCP server is still active
  - `name` string, required: Name of the MCP server. Within a project, MCP server names are unique
  - `description` string, nullable: Textual description of the MCP server
  - `url` string, required: URL of the MCP server endpoint

## Other responses

- `400`: The request was unacceptable, often due to missing a required parameter
- `401`: No valid API key provided
- `403`: The API key doesn’t have permissions to perform the request
- `429`: Too many requests hit the API too quickly. We recommend an exponential backoff of your requests
- `500`: Something went wrong on Braintrust's end. (These are rare.)

## Changes

- **2026-10-30** `8f5039399f77`: 1 breaking
  - the request property `description` became not nullable
- **2026-09-03** `ebac33c1422e`: 1 breaking
  - request body became required
- **2025-12-04** `b6967d956e2f`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/braintrustdata/apis/braintrust-api/changes/v1/mcp_server/post.md)

---

[API](https://skmtc.dev/braintrustdata/apis/braintrust-api.md) - [All operations](https://skmtc.dev/braintrustdata/apis/braintrust-api/llms.txt) - [OpenAPI document](https://skmtc.dev/braintrustdata/apis/braintrust-api/revisions/19184ec94018?raw)