Braintree provides an API for accepting payments online and through mobile apps with a single integration.
Braintree is a payment platform for online and mobile businesses, offering merchants a payment gateway and merchant account. With a single integration, merchants are able to accept credit cards, debit cards, and PayPal globally, as well as Venmo and Apple Pay in the USA.
Braintree provide client libraries and integration examples in Ruby, Python, PHP, Java, .NET, and Node JS; mobile libraries for iOS and Android; and Braintree.js for in-browser card encryption.
Support resources can be found at https://support.braintreepayments.com/.
Questions tagged with braintree should be about integrating with Braintree, using the client, mobile, and browser libraries, or other programming-related questions about Braintree's services.