Citi Pay with Points API
The Citi Pay with Points API enables Citi cardholders to redeem ThankYou points and other rewards balances for purchases at merchant checkouts and inside partner applications. It is part of the Citi Developer Hub retail catalog and is one of the earliest bank rewards APIs, powering embedded points-redemption partnerships. Access uses OAuth 2.0 customer consent; documentation is HTML-only with no public OpenAPI or Postman collection.