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punkpeye/fastmcp: A TypeScript framework for building MCP servers. – Repository punkpeye/fastmcp. Mô tả: A TypeScript framework for building MCP servers.. 3265 stars, 312 forks, ngôn ngữ chính TypeScript, cập nhật 2026-09-13.
1. Repository làm gì?
A TypeScript framework for building MCP servers capable of handling client sessions.
FastMCP implements the legacy, handshake-based MCP revisions (2025-11-25 and earlier). It does not support the current specification, 2026-07-28, which made the protocol stateless — no initialize handshake and no Mcp-Session-Id. For a framework targeting the current spec, use ViteMCP.
When to use FastMCP over the official SDK?
FastMCP is built on top of the official SDK.
The official SDK provides foundational blocks for building MCPs, but leaves many implementation details to you:
FastMCP eliminates this complexity by providing an opinionated framework that:
2. Dữ liệu và cấu trúc đáng chú ý
When to choose FastMCP: You want to build MCP servers quickly without dealing with low-level implementation details.
When to use the official SDK: You need maximum control or have specific architectural requirements. In this case, we encourage referencing FastMCP's implementation to avoid common pitfalls.
There are many real-world examples of using FastMCP in the wild. See the Showcase for examples.
That's it! You have a working MCP server.
You can test the server in terminal with:
If you are looking for a boilerplate repository to build your own MCP server, check out fastmcp-boilerplate.
FastMCP supports multiple transport options for remote communication, allowing an MCP hosted on a remote machine to be accessed over the network.
3. Khả năng ứng dụng và giới hạn
HTTP streaming provides a more efficient alternative to SSE in environments that support it, with potentially better performance for larger payloads.
You can run the server with HTTP streaming support:
This will start the server and listen for HTTP streaming connections on http://localhost:8080/mcp.
Note: You can also customize the endpoint path using the httpStream.endpoint option (default is /mcp).
Note: To serve HTTP streaming and built-in OAuth routes under an issuer path, set httpStream.basePath (for example, /issuer1). This exposes authorization server metadata at /.well-known/oauth-authorization-server/issuer1 per RFC 8414.
Note: This also starts an SSE server on http://localhost:8080/sse.
You can connect to these servers using the appropriate client transport.
For HTTP streaming connections:
FastMCP supports HTTPS for secure connections by providing SSL certificate options:
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