Apple developer documentation

To generate an API key to use with the App Store Connect API, log in to App Store Connect.

Overview. The App Store Server API is a REST API that you call from your server to request and provide information about your customers’ in-app purchases . The App Store signs the transaction and subscription renewal information that this API returns using the JSON Web Signature (JWS) specification.

The Sign in with Apple REST API is a web service that connects you to Apple’s authentication servers. Use this service to generate and validate the identity tokens used to verify a user’s identity. To sign in from a web app or other platform, like Android, use Sign in with Apple JS .