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OAuth and Token Passing in MCP: Should Servers Forward Access Tokens? (Security 2)

When an agent calls an MCP tool on behalf of a signed-in user, something has to authorize the downstream API. The tempting shortcut is to hand the user's access token to the MCP server and let it forward that Bearer token unchanged. That pattern is easy to build and easy to get wrong. This article…

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  1. 2026-11-09 12:36 · DEV Community — AI
    OAuth and Token Passing in MCP: Should Servers Forward Access Tokens? (Security 2)

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