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MCP SERVER · OFFICIAL PROJECT

RapidMCP API Converter

by RapidMCP

Turns your existing REST API into an MCP server with no backend changes, one tool per endpoint.

MCP Plumbing: Proxies, Registries & InspectorsOfficial source
Summary
Published-versus-draft versioning is the feature that separates this from a wrapper script.

Anyone can proxy REST to MCP. What breaks in practice is editing a live tool definition and discovering that production agents changed behaviour mid-conversation. Keeping production on immutable published versions while edits land in a draft — and giving agents a separate editor endpoint to work on the draft — is the difference between a demo and something you can operate. The per-call price on the pay-as-you-go plan makes the cost of an agent's retry loop visible, which is worth knowing before you turn one loose.

What it is

A platform for wrapping your own REST API as an MCP server. Each tool maps one-to-one to an endpoint — get_weather calls GET /api/weather — with authentication, headers and body configured per tool. The endpoint address is per customer, so there is no shared URL to connect to.

What you get
  • Tool definitions mapped to your endpoints, with templated headers passed automatically on every call
  • Optional MCP Prompts for clients that expect reusable presets
  • Dev and prod environments with immutable published versions alongside a workspace draft
  • An editor endpoint so an agent in Cursor can compare published against draft, edit draft tools, and save or publish a version
  • Tool tracing and audit trails over the calls agents make
Requirements

An account and your own API. Stream is the recommended transport, SSE the alternative; clients without remote support go through mcp-remote with the headers passed as flags. A self-hosted edition runs on your own VM under Docker Compose for data residency.

Setup effort

Paste a URL with a key — add the endpoint to your client