A Roundup of US Federal Agencies and Their APIs

I’ve spent the better part of two decades inventorying public APIs across the U.S. federal government, and the catalog has grown to a point where it deserves its own roundup. What follows is the current state of that catalog: every federal agency I’m tracking that exposes some kind of public-facing API, RSS feed, open-data surface, or referenced internal system, indexed in machine-readable form as APIs.yml in a dedicated GitHub repository under github.com/api-evangelist. Each entry below links to that repository so you can pull the structured index, the controlled vocabulary, and where…