The original title is "MCP Session Architecture: Scale Agent Integrations Without Sticky Servers"

Short summary

A practical guide to scaling MCP (Model Context Protocol) servers beyond single-laptop demos by externalizing session state to Redis/Postgres instead of relying on in-memory maps or sticky sessions. It covers gateway patterns for auth, rate limiting, and routing, plus what minimum state every instance needs to route, resume, retry, and audit agent workflows. The architecture treats MCP sessions like web sessions with stricter durability requirements.

• •MCP servers must externalize session state to scale beyond a single instance
• •Gateway layer handles auth, rate limits, routing, and trace ID creation
• •Durable workflow truth lives in Redis/Postgres, not in the server process

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