Advanced10 min

Building Production MCP Servers

Build, deploy, and version production MCP servers with FastMCP — Streamable HTTP transport, health checks, rate limiting, and deployment patterns.

Quick Reference

→FastMCP is the standard framework for building MCP servers in Python
→Streamable HTTP transport for production (not stdio) — works behind load balancers
→Add health checks, rate limiting, and error handling for production readiness
→Version your MCP server's tool schemas — breaking changes need migration
→Deploy as a standalone service or embed in Agent Server
→Test with MCP Inspector or direct HTTP calls

Building with FastMCP

Production MCP server with tools, resources, and prompts

Health checks, rate limiting, and error handling

Pattern	How	Best For
Standalone service	Docker container, Kubernetes deployment	Shared MCP server used by multiple agents
Embedded in Agent Server	langgraph.json mcp_servers config	Tightly coupled with one agent deployment
Serverless	AWS Lambda, Cloud Functions with HTTP adapter	Low-traffic, cost-sensitive
Fleet Tool Server	LangSmith-hosted with OAuth management	No-code deployment with auth built in

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