The Line ObjectiveC Starter Sample Code by Line presents API interaction to access telephony features for smartphone integration. The XC Shared Data is available as a reference to configure and interface connectivity.
Google has announced a number of improvements to Firebase, an application development platform the company acquired in 2014. Improvements include the addition of Crashlytics, updates to the Cloud Messaging API, a new A/B testing framework, and a new product Firebase Predictions.
Twilio has announced the Twilio API for WhatsApp which allows developers to integrate with applications nearly every messaging channel via one Twilio Messaging API. Among the messaging channels the API supports are SMS, MMS, Facebook Messenger, RCS, LINE and the newly added API for WhatsApp.