---
title: "Attest Challenge"
method: POST
path: "/attest/challenge"
tags: ["auth"]
---

# Attest Challenge

`POST /attest/challenge`

Issue a single-use register nonce (5 min TTL).

## Response `200`

Successful Response

- ChallengeResponse — Register nonce minted by ``POST /attest/challenge``.
  - `nonce` string, required

---

[API](https://skmtc.dev/imperfect/apis/imperfect-api.md) · [All operations](https://skmtc.dev/imperfect/apis/imperfect-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/imperfect/imperfect-api/revisions/cc2293a44257/schema)