_Breaking change to Authentication mechanism with new API key format new sk\_prod\_... and sk \_test\_.... PaymentInitiator now required on payment and checkout session resources.

### Added   [Skip link to Added](https://docs.superpayments.com/changelog/version-2025-06-01#added)

- Payments ( _breaking_) \- Now requires `paymentInitiatorId` for payment creation _/payments_
- Checkout Session ( _breaking_) \- Now requires `paymentInitiatorId` for session creation _/checkout-sessions_ and proceed requests _/proceed_
- API - Payment Links Resource Added
- Payment Links - Create Payment Link - POST `/2025-06-01/payment-links`
- Payment Links - Get Payment Link - GET `/2025-06-01/payment-links/{linkId}`
- Payment Links - Update Payment Link - PUT `/2025-06-01/payment-links/{linkId}`
- Payment Links - Delete Payment Link - DELETE `/2025-06-01/payment-links/{linkId}`
- Payment Links - List Payment Links - GET `/2025-06-01/payment-links`