Actions to MCP: turn an OpenAPI schema into an MCP server

How to use it

1. 1

   Paste an OpenAPI 3.0 or 3.1 schema, or upload a local JSON or YAML file. This page never fetches a schema from a URL.

2. 2

   Review the operations, edit the server URL if needed, and pick auth: none, an API key held as a Worker secret, or OAuth / bearer pass-through. Keep the default secret URL path, or choose the header gate if your client can send custom headers.

3. 3

   Download the ZIP. The endpoint is https://<your-worker>.workers.dev/mcp/<MCP_PATH_TOKEN>. That URL is the secret. On your machine run npm i, wrangler secret put MCP_PATH_TOKEN, then wrangler deploy.

Known limitations

• Swagger 2.0 rejected
• Non-JSON bodies, external $refs, TRACE, and webhooks/callbacks skipped
• Cookie params dropped
• One global auth mode
• deepObject/explode not modeled
• No full OAuth 2.1 server