# proof-of-work-required

`https://ckrets.ai/problems/proof-of-work-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 |
|---|---|---|
| 428 | - | solve the `stamp` in the body and resend with `Ckrets-Proof` (anonymous creates only) |

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