Capital One In-Store Credit Card Payments API
The Capital One In-Store Credit Card Payments API lets merchants process Capital One credit card payments directly within their in-store point-of-sale flows. It supports accepting card payments, issuing receipts, and managing transactions from a merchant's POS integration. Access is OAuth 2.0 secured through DevExchange, tested in the sandbox and gated behind partner approval for production. Reference material is HTML documentation on the DevExchange portal; no publicly downloadable OpenAPI definition is provided by Capital One.