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Require Authorization header to pass authentication flow with gateway #2

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8c28735
Add playground OAuth flow
APuzik-devpulse Feb 11, 2026
88fd129
Restore original agentgateway files
APuzik-devpulse Feb 12, 2026
56cb5a6
Remove project specific CLAUDE.md
APuzik-devpulse Feb 12, 2026
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13 changes: 13 additions & 0 deletions crates/agentgateway/src/mcp/router.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -148,6 +148,19 @@ impl App {
"MCP auth configured; validating Authorization header (mode={:?})",
auth.mode
);
// When mcpAuthentication is configured, always require an Authorization
// header — even in permissive mode. This ensures the gateway returns
// 401 + WWW-Authenticate on the first unauthenticated request, triggering
// OAuth discovery. Without this, permissive mode would silently forward
// unauthenticated requests to the upstream, which returns its own 401
// with the upstream's URL (not the gateway's), breaking the OAuth flow.
if req.headers().get(http::header::AUTHORIZATION).is_none() {
return Err(Self::create_auth_required_response(
ProxyError::ProcessingString("missing authorization header".to_string()),
&req,
auth,
));
}
auth
.jwt_validator
.apply(None, &mut req)
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