prefecthq/fastmcp (FastMCP) is a framework that connects Python functions and APIs as MCP servers and clients. MCP (Model Context Protocol) is the protocol through which LLMs connect to tools and data. The latest release in the repository is v4.1.3, and the source is the prefecthq/fastmcp repository on GitHub. However, the provided record lists no changed items for v4.1.3, so what changed can only be known by checking the repository's release notes directly.
Declaring tools as Python functions automatically produces the schema, the validation and the documentation. The library manages transport negotiation, authentication and the protocol lifecycle when connecting to a server. Adapter features such as OpenAPI integration are also supported. The README describes FastMCP in three branches: servers, clients and interactive apps. Servers provide tools, resources and prompts, Apps provide an interactive UI that appears inside the conversation, and Clients connect to local or remote MCP servers. The license is Apache-2.0, the primary language is Python, and the GitHub star count is 28151.
However, the record contains no performance figures or benchmarks, so there is no basis for comparing how it behaves at a given scale. Of the score items, only momentum is filled in, at 4.3 out of 10, while novelty, tech and quality are empty. The repository was created on November 30, 2024, and the offered scope runs from servers and clients to interactive apps. The sensible order is to first check whether the features that are needed are covered inside that scope.