OBIE Payment Initiation API (PIS, shared standard)
The OBIE Read/Write Payment Initiation (PIS) standard for initiating domestic, scheduled, standing-order, international, and file payments with customer consent, secured with FAPI OAuth2/OIDC, mutual-TLS, and PSD2 strong customer authentication. Captured here as the shared OBIE standard reference; Leeds Building Society is not a payment account provider and does not publish this API. Unverified for this bank - no base URL was confirmed.