Cielo 3DS 2.2 Authentication API
Cielo 3DS 2.2 is an EMVCo-compliant cardholder authentication service exposed via the Braspag MPI endpoint. It confirms that the buyer is the legitimate cardholder for card-not-present transactions on Visa, Mastercard, Elo, and Amex. Integrators call POST /v2/auth/token for a bearer token, then submit transactions through POST /1/sales using the ExternalAuthentication node (Cavv, Xid, ECI, Version, ReferenceID). Successfully authenticated transactions shift chargeback liability to the issuer.