Santander UK Payment Initiation API
OBIE Read/Write Payment Initiation (PIS) API for initiating domestic, scheduled, standing-order, international, and file payments on behalf of customers. FAPI-secured (OAuth2/OIDC, mTLS, PSD2 SCA); onboarding via the Santander Developers portal with OBIE/eIDAS certificates.
Documentation
Documentation
https://developer.santander.co.uk/sanuk/external/product
APIReference
https://developer.santander.co.uk/sanuk/external/