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mcp.run vs FastMCP

mcp.runFastMCP

Bottom line: mcp.run for developers building on MCP; FastMCP for python developers building MCP servers.

Platform to discover, install, and run MCP servers and tools

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The fast, Pythonic way to build MCP servers and clients, plus optional cloud hosting.

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Votes00
PricingFreemiumFreemium
CategoryMcpMcp
Tags
mcpmodel-context-protocolai-toolswebassemblyagent-tools
mcppythonframeworkopen-sourceserver-sdk
Best for
  • Developers building on MCP
  • Teams distributing internal tools to agents
  • Security-conscious agent builders
  • Python developers building MCP servers
  • Teams wrapping internal services as tools
  • Prototyping MCP clients
Pros
  • Curated registry of MCP servers/servlets
  • Portable, sandboxed Wasm execution model
  • Dynamic reprogrammable MCP server for on-demand tools
  • Built by Dylibso, a WebAssembly specialist
  • Works across MCP clients like Claude and Cursor
  • Minimal-boilerplate, decorator-based API
  • Auto-generates schema, validation, and docs
  • Powers a large share of MCP servers
  • Open source and free
  • Handles transport, auth, and lifecycle
Cons
  • Value depends on MCP ecosystem adoption
  • Wasm servlet model is a newer paradigm to learn
  • Registry breadth still maturing versus large directories
  • Primarily developer-focused
  • Enterprise features and pricing less publicized
  • Python only
  • Fast-moving API across 1.0/2.0/3.0 requires version pinning
  • Hosted FastMCP Cloud/Horizon are separate paid products
  • Relationship between the SDK-bundled version and standalone project can confuse newcomers
  • Production hardening still on the developer

Comparison generated from each tool's listing. Add or remove tools above to change it.