OpenAPI to MCP Server Converter

What is OpenAPI to MCP Server Converter?

A tool for automatically converting OpenAPI specifications into Model Context Protocol (MCP) server instances. It is intended for developers who want to expose REST APIs as MCP-compatible tools for AI assistants.

How to use OpenAPI to MCP Server Converter?

Install via npm install openapi-mcp-converter. Import OpenApiMCPSeverConverter, pass an OpenAPI document and optional configuration (timeout, security), then call getServer() to obtain an MCP server. Connect the server via an MCP transport (stdio, SSE, or Streamable HTTP) and run it. Sample tests can be executed with npm run test.

Key features of OpenAPI to MCP Server Converter

• Auto-parses OpenAPI 3.0 specifications
• TypeScript‑based strong type validation
• Automatically maps tool call parameters
• Supports stdio, SSE, and Streamable HTTP transports
• Configurable request timeout and API key security

Use cases of OpenAPI to MCP Server Converter

• Convert an existing REST API (OpenAPI) into MCP tools for LLMs
• Run an MCP server locally using stdio transport
• Host an MCP server over SSE or Streamable HTTP for remote access
• Automate API integration with AI assistants by generating MCP tools on the fly

FAQ from OpenAPI to MCP Server Converter

What are the runtime prerequisites?

Node.js 18+ and TypeScript 5.x are required.

What transports are supported?

The server can run over stdio, SSE (Server-Sent Events), and Streamable HTTP transports.

How can I configure authentication for API calls?

Pass a security option to the converter constructor, for example { security: { apiKey: 'my-api-key' } }. The converter forwards this in tool call requests.

What OpenAPI version does it support?

It explicitly supports OpenAPI 3.0 specifications.

Where does the converted server code live?

The converter produces a server object in memory; no files are generated. Users implement the transport and run the server manually.