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Oliver Kieselbach
93c6e1facb
A self-hosted AI client redirects to its own domain, which the vendor
redirect allowlist never admits, so it could not use the browser sign-in.
Tenant Admins can now register the client's exact OAuth callback in the
portal and configure the client with client id amc_<registrationId>.
- MCP OAuth proxy: an amc_ id is resolved through the backend; its
registration is the redirect allowlist entry for that exact callback.
Authorize and token run at the registering tenant's Entra authority, and
the token endpoint discards a token of any other tenant (code and
refresh). Lookups are cached for 60 s, a failed lookup fails closed. Every
other client keeps the allowlist check before its resolution.
- Backend: table McpClientRegistrations, TenantAdminOrGA routes
tenants/{tenantId}/mcp-client-registrations (list, create, delete; at
most three, https or loopback http, exact URI, audited) and the anonymous,
per-IP rate-limited lookup auth/mcp/client-registrations/{id} (under
/api/auth for the client-certificate exclusion list).
- AdminConfiguration.McpClientRegistrationEnabled (default off) is the
platform switch: off hides the portal section and makes every lookup 404.
auth/me carries it for the sidebar.
- Portal: Settings > Tenant > Self-hosted AI clients (Tenant Admin / Global
Admin), and the switch in Admin > Settings > Global.
- Tests: MCP tenant-client flow (authority, tid check, revocation, cache,
allowlist), backend round trip, wire parity, validation, cap, switch,
audit; nav visibility. Manifests and wire types regenerated.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>