AgentID provides AI agents with a dedicated email identity so they can sign into applications independently, without sharing a user's account credentials. It uses standard OpenID Connect, making it compatible with existing auth platforms like Clerk, Auth0, Supabase, Better Auth, and Auth.js. Authentication is handled via one-time signatures so no reusable password or key is ever handed to the app. Developers can integrate AgentID through a CLI tool, and access can be revoked instantly to stop an agent from signing in.