Unverified50% confidenceDecision RuleExact time
The MCP server acts as an OAuth-protected resource and Entra ID as the authorization server; clients without a token receive an authentication challenge and discover the authorization metadata; the server must validate issuer, audience, validity period and scope or role; a token intended for a downstream API should not be automatically accepted as a token for accessing this MCP server.
1
Sources
50%
Confidence
Long-term
Relevance
10/17/2026
First Seen
Sources
Building and Deploying MCP Servers on Azure: A Python Hands-On and Security Guide
youtubeTechnologies Podcast10/16/2026
Related Entities
Related Claims
UnverifiedBoth OAuth and OpenID Connect assume that the MCP client has already been registered with the server or authorization server.78% similarUnverifiedEvery protected MCP server must publish a JSON document located at /.well-known/oauth-protected-resource, declaring the server's identity, supported permission scopes, and the authorization servers qualified to issue tokens.78% similarVerifiedOAuth is one of the most common authentication mechanisms in the MCP ecosystem; after a user completes identity verification on the authorization server, they receive a time-limited access token and a refreshable refresh token.78% similarUnverifiedAn MCP server may only accept tokens issued for itself and must not forward client tokens to another API, as doing so would create a Confused Deputy vulnerability.77% similarUnverifiedUnder the ID-JAG model, MCP servers need to transition from passive resource endpoints that accept access tokens to active, verification-capable participants in the enterprise authorization system.76% similar
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