FastMCP

FastMCP OpenAPI and FastAPI Integration

FastMCP can generate an MCP server directly from an existing OpenAPI 3.x description or a FastAPI application, turning every HTTP operation into an MCP tool with auto-generated schemas and validation. This makes FastMCP a one-step path from any existing REST API to an agent-callable MCP surface, and is the recommended route for retrofitting MCP onto established services without rewriting business logic.

GitHub

Documentation

📖
Documentation
https://gofastmcp.com/integrations/openapi
📖
Documentation
https://gofastmcp.com/integrations/fastapi

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/fastmcp-openapi"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
aid: fastmcp:fastmcp-openapi
name: FastMCP OpenAPI and FastAPI Integration
description: FastMCP can generate an MCP server directly from an existing OpenAPI 3.x description or a
  FastAPI application, turning every HTTP operation into an MCP tool with auto-generated schemas and validation.
  This makes FastMCP a one-step path from any existing REST API to an agent-callable MCP surface, and
  is the recommended route for retrofitting MCP onto established services without rewriting business logic.
humanURL: https://gofastmcp.com/integrations/openapi
baseURL: ''
tags:
- MCP
- OpenAPI
- FastAPI
- REST
- Integration
properties:
- type: Documentation
  name: OpenAPI Integration
  url: https://gofastmcp.com/integrations/openapi
- type: Documentation
  name: FastAPI Integration
  url: https://gofastmcp.com/integrations/fastapi