fastmcp を Homebrew でインストール

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• fastmcp

プロジェクトの歴史

The standalone PrefectHQ/fastmcp repository was created on November 30, 2024, and PyPI records the first 0.1.0 upload minutes later. The official docs say FastMCP 1.0 was incorporated into the official MCP Python SDK in 2024, while the standalone project later grew into the actively maintained framework.

The project has moved quickly with the MCP ecosystem. Its upgrade guide documents the shift from the SDK-bundled import path, from mcp.server.fastmcp import FastMCP, to the standalone from fastmcp import FastMCP import, and says most servers can upgrade with that import change.

By 2026, the project was on the 3.x line, with documentation organized around servers, clients, apps, deployment, CLI commands, integrations, and LLM-friendly docs. The README and docs identify Prefect as the maintainer and connect production deployment to Prefect Horizon.

採用の歴史

FastMCP's adoption is unusually fast because it rides the MCP wave: AI agents need tool and data access, and Python developers want a decorator-based framework rather than raw protocol plumbing. The official README claims the standalone project is downloaded a million times a day and that some version of FastMCP powers 70% of MCP servers across languages.

The repository also shows strong current interest, with more than 25,000 GitHub stars in June 2026. That signal should be read as developer attention and ecosystem momentum, not a precise measure of production deployments.

使われ方

A minimal FastMCP server creates a FastMCP instance, decorates a Python function with @mcp.tool, and calls mcp.run(). The framework generates the tool schema and handles the MCP side of the server.

FastMCP also includes clients for connecting to local or remote MCP servers, apps for interactive UIs inside conversations, a CLI for running and inspecting servers, and fastmcp.json for portable declarative project configuration. The docs expose llms.txt and markdown pages so LLM-driven coding agents can consume the documentation directly.

パッケージ好きにとっての重要性

FastMCP matters to package nerds because it is the framework layer turning MCP from a protocol spec into an installable developer experience. The package bundles a fast-moving protocol client/server stack, a CLI, config conventions, docs meant for LLM consumption, and compatibility guidance for older SDK-bundled servers.

It is also a snapshot of 2025-2026 packaging culture: packages are not just libraries for humans anymore, but surfaces for coding agents, MCP clients, generated configs, and documentation endpoints that tools can read programmatically.

タイムライン

• 2024: FastMCP 1.0 incorporated into the official MCP Python SDK, according to FastMCP docs.
• 2024: Standalone PrefectHQ/fastmcp repository created on November 30.
• 2024: PyPI 0.1.0 uploaded on November 30.
• 2026: FastMCP 3.x documented as the active standalone framework.
• 2026: Repository shows more than 25,000 GitHub stars.

Related projects

• Model Context Protocol is the protocol FastMCP implements for tools and data access.
• The official MCP Python SDK bundled FastMCP 1.0 and remains a dependency path for compatibility.
• Prefect Horizon is the production MCP gateway promoted by the FastMCP team.

ソース

• https://github.com/PrefectHQ/fastmcp
• https://raw.githubusercontent.com/PrefectHQ/fastmcp/main/README.md
• https://gofastmcp.com/getting-started/welcome.md
• https://gofastmcp.com/getting-started/upgrading/from-mcp-sdk.md
• https://gofastmcp.com/llms.txt
• https://pypi.org/pypi/fastmcp/json
• https://api.github.com/repos/PrefectHQ/fastmcp