Backed by
Combinator
Let your assistant sign up
and log in autonomously.
Or, accept agents securely everywhere with Versine OIDC.
acme.comAssistant’s view
Assistant
Built by engineers from
Your assistant can do almost anything. Except get past a login screen. The moment it needs an account, the magic stops.
1. Your users ask their assistant
Book a table, order dinner, sign up for something new. People want to hand it off and come back to it done, as if by magic.
With Versine, your assistant gets in on its own. Users never have to lift a finger and no passwords are handed over.
1. Your users ask their assistant
Same request, same expectation: hand it off and come back to it done.
Assistants don’t lack intelligence.
They need autonomy. Versine hands it to them.
- 7,851%growth in AI agent traffic over 2025HUMAN, 2026
- 313MAI requests to login pages in H1 2026DataDome, 2026
- 8xgrowth in AI login-page requests across H1 2026DataDome, 2026
- 51.7%of AI traffic to sensitive pages goes to loginDataDome, 2026
For platforms, Versine works with any auth provider you already run. Keep your provider, your accounts and your sessions.
Auth0 Add Versine as an OpenID Connect connection on your Auth0 tenant.
Read the Auth0 guide
Clerk Add Versine to your Clerk app as a custom OpenID Connect provider.
Read the guide
Firebase Add Versine to Firebase Authentication as an OpenID Connect provider.
Read the guide
Supabase Connect Versine to Supabase Auth as an OpenID Connect provider.
Read the guide
WorkOS AuthKit Connect Versine to AuthKit as an OpenID Connect provider.
Read the guide
Descope Add Versine to your Descope flows as a custom OpenID Connect provider.
Read the guide
Stytch Connect Versine to your Stytch project as an OpenID Connect provider.
Read the guideSomething else? Versine is a standard OpenID Connect provider, so it works with any auth that speaks OIDC. Tell us what you run.
Book a demo
Backed by Y Combinator. We’re building the authentication layer for agents alongside the YC community.
Book a demoFrequently asked questions
Anything we haven’t answered? Email support@versine.com and we’ll get back to you.
Versine is an OpenID Connect provider built for agents. Platforms add it to their existing login as an OIDC connection, and assistants use it to sign users up and in, with the user’s permission.
No. The assistant reads a one-time code on Versine’s page and completes the sign-in through its Versine MCP connection. There’s no password to hand over, store or type in.
No. Versine plugs into the auth you already run as an OpenID Connect connection, so your provider keeps your accounts, sessions and permissions. You add an entry point for agents to your login and signup pages, and everything else stays as it is.
Users add Versine’s MCP server to their assistant. The first time it connects, a Versine page opens where they sign in and approve it. Each connection lasts 90 days, and users can disconnect it at any time.
Any of them. Versine is a standard OpenID Connect provider, so it works with any auth that supports OIDC connections, including Auth0, Clerk, Firebase, Supabase, WorkOS AuthKit, Descope, Stytch and in-house systems. Book a demo and we’ll walk through your setup.
Ready to get started?
We’re onboarding platforms and assistants now. Book a demo and we’ll set Versine up with you.
Start building
Add an “Are you an agent?” entry point to your existing login, and connect your assistant over MCP.
Read the docs