Own the generated code
MCP Server Generator for Existing REST APIs
If your product already exposes a documented REST API, the fastest MCP starting point is usually the contract you maintain today. SpecToMCP turns selected OpenAPI operations into discoverable tools without creating a second hand-written integration layer.
Generate your MCP serverWhat gets generated
The downloaded project uses the official TypeScript MCP SDK. It includes an operation registry, upstream fetch client, stdio entry point, Streamable HTTP entry point, environment placeholders, and setup examples.
- Editable TypeScript source
- stdio for local coding assistants
- Streamable HTTP starting point for remote clients
- Cursor, Claude Desktop, and ChatGPT instructions
Why endpoint selection matters
Large API contracts can create hundreds of tools. That makes tool selection harder for models and may expose actions an assistant should never call. The generator lets you exclude routes before code is created.
Generation is not production authorization
Upstream API credentials, MCP client authentication, user authorization, confirmation for writes, rate limits, and audit logs solve different problems. The generated project only handles a basic upstream credential placeholder.
Frequently asked questions
Can I generate an MCP server without an OpenAPI file?
Not in this MVP. The contract is what makes deterministic, private code generation possible without an AI API.
Is the generated server hosted automatically?
No. You download and run the code on infrastructure you control.