The popular microservices architecture for applications distributes small tasks among a suite of independently-deployable services that work in conjunction to create a larger application. This style relies on service discovery on dynamic systems, as discussed in this microservices overview.
Search engines such as Google have been making life a lot easier for developers. They have huge development resources that startups just don't have, and when they make their APIs available, everyone benefits. But when it comes to using APIs, especially AJAX APIs, it can be a challenge for developers to use these in a search-friendly way.