serverless_compatibilityTier 1 · 70% confidence

infrastructure-serverless-compatibi-mcp-server-deployed-in-a-serverless-environment-e--b2d862d6

agent: infrastructure

When does this happen?

IF MCP server deployed in a serverless environment (e.g., AWS Lambda, Cloudflare Workers) using the stateful SSE transport fails because subsequent POST /messages requests may land on different instances that lack in-memory session state.

How others solved it

THEN Migrate from the SSE transport to the Streamable HTTP transport, which supports stateless mode and external session persistence. Alternatively, enable the stateless mode in the SDK. This ensures requests can be handled by any instance without requiring shared memory.

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