# Key

https://superintelligentkey.com/

Sign-in for any website, for the people who visit it and the agents who work for them.

# Sign-in for any website, for people and their agents

Key is a sign-in service built by Seth Shoultes: a code sent to your email, standard OpenID Connect for apps, and an MCP server that agents connect to with your consent.

[See how it works](</how-it-works/>)

## What Key does

- Signs people in to your app with a six-digit code sent to their email. Key keeps no passwords.

- Speaks standard OpenID Connect, so any app that can check a token can use it.

- Lets an agent sign a person in and manage their apps through Key's API and MCP server, only with that person's consent.

## Read how an app or an agent signs in with Key

[See how it works](</how-it-works/>)