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Mcpo

Mcpo is a Python proxy server that takes MCP server commands or supported MCP endpoints and exposes their tools through a RESTful, OpenAPI-compatible HTTP interface. It generates interactive API documentation so agents, SDKs, and applications that accept OpenAPI services can use MCP tools.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Mcpo — OpenViST project profile in MCP & Tooling.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Mcpo when an existing MCP tool needs to be made available to an agent, SDK, or application that consumes OpenAPI-compatible HTTP services.

Who it is for

  • Developers connecting MCP server tools to agents or applications that accept OpenAPI-compatible HTTP services.
  • Teams operating MCP tools who want a generated HTTP interface and per-tool API documentation.

Documented uses

  • Expose an MCP server command as a RESTful OpenAPI service.
  • Connect MCP tools to clients that expect OpenAPI rather than MCP.
  • Serve multiple configured MCP tools on separate routes.
  • Use documented SSE or Streamable HTTP MCP endpoints as inputs to the proxy.
Before you choose

Requirements & limits

  • The project requires Python 3.8 or later; uv is optional and recommended in the README.
  • The proxy accepts a server command, or documented SSE and Streamable HTTP endpoints; the MCP tool itself must be provided separately.
  • The README documents API-key protection and OAuth 2.1 for Streamable HTTP server types.
  • A configuration file can define multiple tools, separate routes, and optional hot reload.
  • The repository identifies the project as MIT-licensed open-source software.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Expose a local MCP server over OpenAPI

Start Mcpo with an MCP server command and access its generated OpenAPI documentation.

Before you start

  • Python 3.8 or later.
  • An MCP server command available in the environment.
  • uv, or Python with pip.

Steps

  1. Start Mcpo with uv using uvx mcpo --port 8000 --api-key "top-secret" -- your_mcp_server_command, or install with the command below and run the documented mcpo command.

    Documented command
    pip install mcpo

  2. Replace your_mcp_server_command with the command for the MCP server you want to expose.

  3. Open http://localhost:8000/docs to view the generated interactive documentation.

Expected outcome

The MCP server’s tools are exposed through an OpenAPI-compatible HTTP service, with interactive documentation at the local `/docs` path.

Guide limitations

  • This recipe covers the documented local command-based setup; it does not establish deployment configuration or integration with a particular client.
  • The documented command includes an API key; protect the key and configure access appropriately for your environment.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
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Sources checked
9 October 2026
Original website title
open-webui/mcpo · Official homepage title · retained in its source language
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