This RUBY library allows you to use TextKey's REST API calls server-side from a Java backend. TextKey is an omni-factor authentication API that uses seven-factors of authentication to provide security for devices ranging from mobile to electronic door locks. TextKey works through using SMS service, unique code, cellular number, UDID, a single use URL, and an optional pin. TextKey uses Rest with a JSON response and SOAP. TextKey is free for ten users, and available for a monthly charge per user thereafter.
APIMatic, SDK generator, announced that its SDKs now support OAuth 2.0. Prior to this announcement, there was minimal support for OAuth 2.0 only for authentication token headers within requests. Now, the company is moving forward with full support and continued development.
There are three standard ways to manage API authentication these days: API keys, OAuth tokens and JSON Web tokens (JWT). Adam Duvander over at the Zapier engineering blog explains how and when to use them. The humble API key is the common and earliest form of API authentication.