SendGrid announced its latest endpoint for its Web API: v3/mail/send. The endpoint rounds out the v3 release that began last year. With the new send endpoint, SendGrid has realized its goal of complete API management via API. All of the v2 functionality remains available with additional features.
As a developer, you can figure out how to make your program connect to Facebook, Twitter, SMS, and Email. Or you can use the Embarke API and connect just to Embarke, a messaging platform that connects you to them all. You can skip learning the specifics of how to connect to each of them. The REST API's website has a five minute tutorial video on how to use this gateway to its developer tools for social communications.