Best MCP Servers for API Development (2026)
Tools for designing, mocking, and consuming APIs through MCP: OpenAPI and Swagger servers that turn specs into tools, an MCP GraphQL server, Mockd for instant mock APIs, and a FastAPI generator that converts endpoints into an MCP server automatically.
This page collects the 7 MCP servers in our directory that genuinely cover api development — together they have 13,459 GitHub stars, and 0 of them run as hosted services you can connect to without installing anything. The highest-rated options are FastAPI to MCP auto generator, snaggle-ai/openapi-mcp-server, blurrah/mcp-graphql.
How to choose
Point the OpenAPI server at your spec to expose an existing API, use Mockd when the backend does not exist yet, and the FastAPI generator when your API is a FastAPI app you want to ship as MCP.
FastAPI to MCP auto generator
by tadata-org
A zero-configuration tool for automatically exposing FastAPI endpoints as MCP tools by ****
npx -y fastapi-to-mcp-auto-generatorsnaggle-ai/openapi-mcp-server
by snaggle-ai
🏎️ 🏠 - Connect any HTTP/REST API server using an Open API spec (v3)
npx -y @modelcontextprotocol/inspectorblurrah/mcp-graphql
by blurrah
📇 ☁️ - Allows the AI to query GraphQL servers
npx -y mcp-graphqlgetmockd/mockd
by getmockd
](https://glama.ai/mcp/servers/getmockd/mockd) 🏎️ 🏠 🍎 🪟 🐧 - Multi-protocol API mock server with 18 MCP tools. Mock HTTP, GraphQL, gRPC, WebSocket, MQTT, SSE, and SOAP APIs with chaos engineering,
npx -y getmockd-mockdReAPI-com/mcp-openapi
by ReAPI-com
📇 🏠 - MCP server that lets LLMs know everything about your OpenAPI specifications to discover, explain and generate code/mock data
npx -y @reapi/mcp-openapikadykov/mcp-openapi-schema-explorer
by kadykov
MCP server that provides token-efficient access to OpenAPI v3.0 and Swagger v2.0 specifications through MCP Resource Templates, so clients can explore paths and components on demand without loading a whole spec into the model's context. Specs load from local file paths or remote URLs, and Swagger v2.0 documents are automatically converted to OpenAPI v3.0 on load.
npx -y Methodzaizaizhao/mcp-swagger-server
by zaizaizhao
MCP Swagger Server converts OpenAPI/Swagger specifications into Model Context Protocol format with zero configuration, turning REST APIs into tools AI assistants can call. It is CLI-first with a guided, step-by-step command-line flow, supports SSE, Streamable HTTP, and stdio transports and Bearer <redacted> authentication, and the monorepo also contains an OpenAPI parser package and a REST API backend package.
npx -y mcp-swagger-monorepoFrequently asked questions
What is the most popular MCP server for API Development?
FastAPI to MCP auto generator leads this list with 11,844 GitHub stars. A zero-configuration tool for automatically exposing FastAPI endpoints as MCP tools by ****
Are these API Development MCP servers free to use?
7 of the 7 servers here publish a license in the directory (MIT, Apache-2.0). 0 of them run as hosted services you can connect to remotely; the rest you install and run yourself. Hosted services may have their own pricing.
How do I choose an MCP server for API Development?
Point the OpenAPI server at your spec to expose an existing API, use Mockd when the backend does not exist yet, and the FastAPI generator when your API is a FastAPI app you want to ship as MCP.