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MCP Authentication and Secrets Management in Production (EXPLAINED)

Scenario BasedMCPHard22 min read

MCP auth interviews test whether you treat agents as privileged automation — because they are.

TL;DR — Quick Answer

Keep secrets out of model context: use gateway SSO, short-lived scoped tokens, OS keychains or vault sidecars for servers, per-user OAuth where needed, and never pass credentials through tool arguments the model controls.

The Interview Question

How should MCP hosts and servers handle authentication, credential storage, and secret rotation without exposing tokens to the model?

Deep Explanation

MCP auth interviews test whether you treat agents as privileged automation — because they are.

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