The simple authorization detached authentication service for any platforms.
Free, foreverAI-native
The simple authorization detached authentication service for any platforms.
Build applications with Sudomimus non-invasive authentication service.
Signin via Sudomimus
Visit the destination application directly and find “Signin via Sudomimus” button.
Manage your account
Review your profile, control which applications can see your email and name, and manage every way you sign in — all from one place.
Build with Sudomimus
Build your application on Sudomimus without worry about authentication.
Or, hand it to your AI
Read https://docs.sudomimus.com/llms-full.txt and integrate Sudomimus
authentication into my application.
Stack: <your stack, e.g. Next.js 14 + Drizzle + Postgres>
Auth methods: <e.g. passkeys + email OTP>
Application anchor: app_xxxxxxxxxxxxxxxx
Callback URL: <your callback URL>Adopt a domain
As owner of a domain, you can adopt it to manage user registered under your domain. Sudomimus support customize authentication method for your domain for security and compliance.
Security you can trust
Modern authentication primitives, secure by default.
Passwordless by default
Passkeys and WebAuthn let users sign in with no password to phish or steal.
Signed, verifiable tokens
Every token is RS256-signed with a dedicated RSA-2048 key per application.
Encrypted at rest
Private keys are encrypted at rest, and replay protection guards every request.
Many ways to sign in
Passkeys, email OTP, Steam, and OAuth providers — gated per application.
Privacy by design
Your users stay in control of their identity.
Applications never see your real ID
Each application receives a per-user pairwise identifier, never your underlying account.
You decide what is shared
Choose per application whether your email and name are included in its tokens.
Delete your account anytime
Your data is yours — erase your account and its personal data whenever you want.
Start building — free, forever
Add authentication to your application without the cost or the complexity.