# proof-required

`https://ckrets.ai/problems/proof-required` is a problem type of the ckrets.ai API (RFC 9457: the body is
`application/problem+json` with `type`, `title`, `status` and `detail`; every problem from `/v1` also carries `requestId`).

| Status | Also in the answer | What to do |
|---|---|---|
| 401 | - | a box needs a proof you did not send or that was wrong (`result: "wrong"` counts an attempt; the body says how many are left and the cooldown); a `403` with this type is a failed Turnstile check: solve it again and send the fresh token |

Every type, with its retry rule and headers: [limits.md, "Errors, retries and headers"](/limits.md#errors-retries-and-headers).