Unverified50% confidenceFactExact time
In MCP over HTTP communication, when a client makes a call without a token, the server returns 401 Unauthorized.
1
Sources
50%
Confidence
Long-term
Relevance
10/10/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedIn the OAuth flow, the MCP server returns a 401 Unauthorized response to requests without a valid token, along with a login URL pointing to the authorization server.79% similarUnverifiedRemote MCP provides account-specific connections through cTrader Web, with each connection bound to a specific trading account, and tokens are regenerated after switching accounts or re-logging in.63% 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.63% similarVerifiedRemote MCP services adopt the Streamable HTTP mode, based on HTTP/1.1 or HTTP/2 protocols, with support for Server-Sent Events (SSE).63% similar
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