{"name":"SUMail Verification Gateway","version":"0.1.0-demo","environment":"DEMO","warning":"TESTNET ONLY - NOT FOR PRODUCTION USE","endpoints":{"auth":{"GET /auth/challenge/:address":"Get authentication challenge","POST /auth/verify":"Verify signed challenge"},"credentials":{"GET /credentials/:id":"Get credential metadata","GET /credentials/:id/verify":"Verify credential validity","GET /credentials/subject/:address":"List credentials for subject","GET /credentials/:id/pdf":"Stream encrypted PDF","GET /credentials/:id/payload":"Stream encrypted payload","GET /credentials/:id/encryption-meta":"Get encryption metadata"},"grants":{"POST /grants":"Create a grant","DELETE /grants/:id":"Revoke a grant","GET /grants/:id/key":"Get encrypted key","GET /grants/access/:credentialId":"Check access","GET /grants/given":"List grants given","GET /grants/received":"List grants received","GET /grants/credential/:credentialId":"List grants for credential"},"audit":{"GET /audit/logs":"Get audit logs","GET /audit/stats":"Get gateway statistics","GET /audit/health":"Health check"}}}