fastmcp-server

Topics in the source

• FastMCP 3.0 Server Development
• When to use this skill
• Quick reference
• Core patterns
• Using context in tools
• Authentication setup
• Key concepts
• Tools

Complete reference for building production-ready MCP (Model Context Protocol) servers with FastMCP 3.0 - the fast, Pythonic framework for connecting LLMs to tools and data. Use FastMCP Server when: Creating a new MCP server in Python Adding tools, resources, or prompts to an MCP server Implementing authentication (OAuth, OIDC, token verification) Setting up middleware for logging, rate limiting, or authorization Configuring providers (local, filesystem, skills, custom) Building production MCP servers with telemetry and storage Upgrading from FastMCP 2.x to 3.0 Key areas covered: Tools & Resources (CORE): Decorators, validation, return types, templates Context & DI (CORE): MCP context, dependency injection, background tasks Authentication (SECURITY): OAuth, OIDC, token verification, proxy patterns Authorization (SECURITY): Scope-based and role-based access control Middleware (ADVANCED): Request/response pipeline, built-in middleware Providers (ADVANCED): Local, filesystem, skills, and custom providers Features (ADVANCED): Pagination, sampling, storage, OpenTelemetry, versioning Create a server with tools: Create a resource: Create a resource template: Create a prompt: Run the server

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