---
title: "Start passkey login"
method: POST
path: "/users/webauthn/authenticate/options"
tags: ["WebAuthn"]
---

# Start passkey login

`POST /users/webauthn/authenticate/options`

Generates WebAuthn authentication options, optionally scoped to a username.

## Response `200`

Authentication options and challenge id.

## Other responses

- `404` — No passkeys found for the user.

---

[API](https://skmtc.dev/termix/apis/termix-api.md) · [All operations](https://skmtc.dev/termix/apis/termix-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/termix/termix-api/revisions/f4ef343eff1b/schema)