# GET /auth
URL: https://developers.vsee.io/api/user-api/get/auth
operationId: authRedirect
Auth: No Auth — This endpoint requires no authentication headers.

SSO redirect login

Use this URL to redirect a user to VSee Clinic with automatic login.

Pattern: `https://{portal_url}/auth?sso_token={token}&next={next_url}`

This will log the user in and redirect them to the specified URL path.

Parameters:
- sso_token (query, string, required) — SSO token from the POST /users/sso response
- next (query, string, optional) — URL path to redirect the user to after login
- one_time_token (query, string, optional) — Set to `1` to invalidate the sso_token after login (additional security) [enum: 1]
- disable_navigation (query, string, optional) — Set to `1` to disable all email communication [enum: 1]

Responses:
- 302 — Redirects user to VSee Clinic portal