The Coinkite PHP Sample Code by Coinkite demonstrates API interaction, providing Key and Secret to access & endpoints to send requests. Sign up files are available for download from the main site below PHP code.
Square has announced the release of a software development kit that provides developers with all the tools necessary to accept payments in their applications via Square. The In-App Payments SDK is available for iOS, Android, and Flutter.
Violet this week announced what it says is a "unified API for anything on the internet." The idea is to make it easy for people to buy whatever they want, no matter where they see it on the web, without requiring them to backtrack or hop through ecommerce sites across the internet.
Airbitz has utilized its Bitcoin Wallet Plugin API internally and through select partners for a while. Now, the company has released the API to its entire user base. Airbitz expects the API to boost cryptocurrency usage through integrations with everything from marketplaces to gift card vendors.