Challenge.gov was sunset in March 2026. GSA says so in its own repository: the content "has moved to other government websites."

What that means in practice: federal prize competitions — the challenges agencies run with cash purses for outside solvers — now live scattered across USA.gov and individual agency sites. One page per challenge. No API, no feed, no export, nothing an agent can call.

The listings themselves are U.S. government works — public domain. Nothing stops anyone from building the missing feed. The question I'm testing is whether anyone would pay for it, because I'm not building on guessed demand.

The honest complication — a free feed already exists

A volunteer project, federal-prize-feed, already publishes the active listings as files: JSON and CSV of every USA.gov-listed challenge plus agency-only ones, an Atom feed, a deadline calendar, a closing-soon digest, and a changes file — free, with its code under Apache-2.0.…