* The API attempts to conform to the RESTful design principles. * You interact with the resources exposed via the API by accessing resource collection and element URIs using the HTTP verbs (GET, POST, PUT, and DELETE). * Chargify accepts and returns both JSON and XML data via the API.

Mobile Express Checkout — For existing Express Checkout integrations, or additional features, we recommend Mobile Express Checkout. 2.Parallel or Chained Payments — To incorporate features such as third-party, parallel, and chained payments into your mobile apps see the Mobile Payment Library (MPL) on GitHub and MPL documentation. Issues related to MPL should be filed in the following repository: sdk-packages