MCP Fastmcp Patterns

Rapidly building production-grade MCP servers using the FastMCP framework.

jcorpac 369b62f 836 B Updated

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MCP FastMCP Patterns

FastMCP is the "FastAPI of MCP." It simplifies tool and resource registration.

Core Patterns

  • Decorators: Using @mcp.tool() and @mcp.resource() for declaration.
  • Auto-Schema: FastMCP automatically generates JSON Schema from Python type hints and docstrings.
  • Dependency Injection: Managing shared resources (e.g., DB connections) within the server instance.

Workflow

  1. Define: Create your server class.
  2. Register: Decorate your functions.
  3. Run: Start the server using mcp.run().

Best Practices

  • Type Safety: Lean on Pydantic models for complex inputs.
  • Modularization: Split large servers into multiple files using routers.

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