UK Open Banking Payment Initiation API (OBIE Standard)
Shared OBIE Read/Write Payment Initiation (PIS) standard, FAPI-secured with OAuth2/OIDC, mutual-TLS, and PSD2 SCA. Included as the OBIE v4.0 standard specification, not a confirmed Recognise Bank contract; Recognise does not offer payment/current accounts and exposes no confirmed PIS surface.