---
title: "Get WebAuthn authentication options"
method: POST
path: "/auth/webauthn/authentication-options"
tags: ["Auth"]
---

# Get WebAuthn authentication options

`POST /auth/webauthn/authentication-options`

Retrieve WebAuthn authentication challenge and options for passwordless login with biometrics or security keys.

## Response `200`

Success

- WebAuthnAuthenticationOptionsResponse

## Other responses

- `400` — Bad Request - The request was malformed or contained invalid data
- `429` — Too Many Requests - You are being rate limited
- `500` — Internal Server Error - An unexpected error occurred

---

[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/d9c706133cc5/schema)