API Reference POST /vss/v2/validate Example Payload (Profile A: mTLS / PIV Auth) { "validationPolicyId": "2.16.840.1.101.10.2.18.2.1.4", "x509Certificate": "MIIFYjCC...[Base64 DER]..." } Example Payload (Profile B: CardAuth Contactless) { "validationPolicyId": "2.16.840.1.101.3.2.1.3.17", "x509Certificate": "MIIFuzCC...[Base64 DER]..." }