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OpenAPI MCP Server

@rahgadda

Repository

Basic information

Category

Other

License

Apache-2.0

Transports

stdio

Author

rahgadda

About OpenAPI MCP Server

OpenAPI MCP Server

OpenAPI MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "openapi_mcp_server": {
      "command": "uv",
      "args": [
        "init"
      ]
    }
  }
}

OpenAPI MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is OpenAPI MCP Server?

OpenAPI MCP Server is a Model Context Protocol server that exposes configured REST APIs as context tools for large language models (LLMs). It enables LLMs to interact with REST APIs via natural language prompts, supporting GET, PUT, POST, and PATCH methods.

How to use OpenAPI MCP Server?

Install the package with pip install openapi_mcp_server, then create a .env file with the mandatory OPENAPI_SPEC_PATH and API_BASE_URL variables. Test the server using uv run openapi_mcp_server. For Claude Desktop, add the server configuration to the mcpServers section in the Claude Desktop JSON config, specifying the command uv run openapi_mcp_server and any optional environment variables (e.g., API_HEADERS, API_WHITE_LIST).

Key features of OpenAPI MCP Server

  • Integrates REST APIs as context for LLMs.
  • Supports GET, PUT, POST, and PATCH HTTP methods.
  • Configured via environment variables (OPENAPI_SPEC_PATH, API_BASE_URL).
  • Optional API headers, operation ID whitelist/blacklist.
  • Optional HTTP/HTTPS proxy support.
  • Debug logging available (DEBUG environment variable).

Use cases of OpenAPI MCP Server

  • Enable LLMs to query and modify data via REST APIs using natural language.
  • Automate API interactions (CRUD operations) through conversational prompts.
  • Connect LLM assistants to existing API endpoints without custom code.
  • Filter operations by whitelist/blacklist to control API exposure.

Frequently asked questions

1

What configuration is required to run OpenAPI MCP Server?

You must set the `OPENAPI_SPEC_PATH` (path to the OpenAPI document) and `API_BASE_URL` (base URL for API requests) in a `.env` file or as environment variables.

2

Which HTTP methods does OpenAPI MCP Server support?

It supports GET, PUT, POST, and PATCH requests.

3

Can I restrict which API operations the server exposes?

Yes, use the `API_WHITE_LIST` (allow only listed operationIds) or `API_BLACK_LIST` (block listed operationIds) environment variables.

4

Does OpenAPI MCP Server support proxy servers?

Yes, you can configure `HTTP_PROXY`, `HTTPS_PROXY`, and `NO_PROXY` environment variables for proxy support.

5

How do I use OpenAPI MCP Server with Claude Desktop?

Add a server entry to the `mcpServers` section of your Claude Desktop configuration JSON, using the command `uv run openapi_mcp_server` and specifying the required environment variables such as `OPENAPI_SPEC_PATH` and `API_BASE_URL`.

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