---
title: "Begin MFA login with a passkey"
method: POST
path: "/auth/login/passkey/options"
tags: ["Auth"]
---

# Begin MFA login with a passkey

`POST /auth/login/passkey/options`

## Request

- Base URL: `https://app.openpo.st/api/v1`
- URL: `https://app.openpo.st/api/v1/auth/login/passkey/options`
- Auth: none required

## Request body

- BeginPasskeyLoginInputBody
  - `$schema` string, uri: A URL to the JSON Schema for this object.
  - `mfa_token` string, required: Pending MFA challenge token

## Response `200`

OK

- PasskeyCeremonyOutputBody
  - `$schema` string, uri: A URL to the JSON Schema for this object.
  - `challenge_id` string, required
  - `options` unknown, required

## Other responses

- `400`: Bad Request
- `401`: Unauthorized
- `422`: Unprocessable Entity
- `429`: Too Many Requests
- `500`: Internal Server Error

---

[API](https://skmtc.dev/openpo/apis/openpost-api.md) · [All operations](https://skmtc.dev/openpo/apis/openpost-api/llms.txt) · [OpenAPI document](https://skmtc.dev/openpo/apis/openpost-api/revisions/67d3964458a7?raw)