APIs, or application programming interfaces, started out as a mechanism to let computers talk to other computers, but somewhere along the way, they’ve evolved into an ecosystem all their own. For virtually any development need, there is likely an API ready and waiting to deliver. Like the Lincoln Logs or Lego bricks of old, APIs are building blocks for creating applications.
APIs can be pretty niche, but major companies like Microsoft and Google have also stretched their tentacles into the world of APIs. Some are just pathways to interact with major products like email, spreadsheets, or AI integrations. Others are information sources, delivering maps, directions, or other content. These APIs can save you the trouble of building your own database from scratch.
Smaller companies and projects might offer something deeper, stranger, more personal, or simply different. All these smaller APIs—some immensely practical, some frivolous and fun—are great options for supporting your applications.