APIFold

APIFold converts an OpenAPI specification into a server that speaks the Multi‑Tool Communication Protocol (MCP), allowing AI agents to invoke the API’s endpoints as typed tools. Users provide a Swagger or OpenAPI document, configure authentication, rate limits, and optional tool enablement, and the system generates an MCP endpoint that streams responses over SSE with JSON‑RPC payloads. The runtime is available as a single Docker‑Compose stack that can be self‑hosted or run in a managed cloud offering, keeping data on the user’s infrastructure.

The platform targets developers building AI‑augmented applications who need a quick bridge between existing REST services and MCP‑compatible agents such as Claude Desktop, Cursor, Windsurf, or Continue. It supports OpenAPI 2.0, 3.0, and 3.1 specifications, automatically mapping each operation to a callable tool with typed parameters. Security features include encrypted connections, credential vaulting, and request validation before reaching the underlying API.

APIFold is open source under a dual AGPL‑3.0 and MIT license, with the full codebase publicly available and covered by extensive automated tests. A visual dashboard provides import, configuration, and real‑time observability of active MCP connections, while the runtime enforces default security policies such as AES‑256 encryption and SSRF protection.