---
title: "Start backup codes challenge"
method: POST
path: "/users/@me/mfa/backup-codes/challenge"
tags: ["Users"]
---

# Start backup codes challenge

`POST /users/@me/mfa/backup-codes/challenge`

Initiates the challenge required to view existing backup codes. Sends a verification code to the user's email address. Returns a ticket for use in the remaining challenge steps.

## Request body

- EmptyBodyRequest

## Response `200`

Success

- MfaBackupCodesChallengeStartResponse
  - `ticket` string, required — Ticket for backup codes challenge actions
  - `code_expires_at` string, required — ISO8601 timestamp when the verification code expires
  - `resend_available_at` string, required — ISO8601 timestamp when the code can be resent

## Other responses

- `400` — Bad Request - The request was malformed or contained invalid data
- `401` — Unauthorized - Authentication is required or the token is invalid
- `403` — Forbidden - You do not have permission to perform this action
- `429` — Too Many Requests - You are being rate limited
- `500` — Internal Server Error - An unexpected error occurred

## Changes

- **2026-09-03** `f6d51a9b1034` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/fluxer/apis/fluxer-api/changes/users/@me/mfa/backup-codes/challenge/post.md)

---

[API](https://skmtc.dev/fluxer/apis/fluxer-api.md) · [All operations](https://skmtc.dev/fluxer/apis/fluxer-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/fluxer/fluxer-api/revisions/f6d51a9b1034/schema)