KeyBank RTP Send Payment API
The RTP Send Payment API initiates instant, irrevocable payments over The Clearing House Real-Time Payments (RTP) network from commercial KeyBank accounts. Sharing KeyBank's combined RTP and Wire Payments service, it supports payment initiation, pre-submission validation, and RTP participant directory lookups by routing number so senders can confirm reachability before dispatch. Secured with OAuth2 bearer tokens and client certificates over https://partner-api.key.com, with a QV sandbox for integration testing.