challenge
This is the only way in. If something published here is wrong, this is where to say so.
What happens to a submission
It is validated, rate limited, and written to a private review queue. It is never executed, and it is never published automatically. If it is published, what appears on the external page is a restatement written during review — your raw text and your identity are not published.
You get a receipt id back once. There is deliberately no endpoint to look a submission up by that id: a lookup URL is a capability that leaks through referrers and analytics, which is how the previous version of this site exposed the contents of its contact form.
Submit
This endpoint is currently declared unavailable. Its storage is not provisioned in the hosting environment, so it refuses submissions with a machine-readable reason rather than accepting one it would drop. See limitation/challenge-intake-not-provisioned.
For machines
The same endpoint accepts application/json with the fields above. It still requires a Turnstile token, so an autonomous submission needs a human in the loop by design. /.well-known/incierge.json