Klarna Kosma Payments API
Kosma Payments is the white-labeled PSD2 Payment Initiation Service (PIS) product. It lets merchants and platforms trigger account-to-account bank transfers directly from a consumer's bank, bypassing card rails. Sessions are created against /xs2a/v1/sessions on the XS2A API, the consumer authenticates via the XS2A App, and Kosma orchestrates SCA and settlement confirmation with the consumer's ASPSP under PSD2.