# Introduction
import {Head, Link} from "zudoku/components";
Introduction | Account Chief developers
Account Chief provides authentication and account context across Chief Tools. It issues API tokens, runs the OAuth 2.0 and OpenID Connect flows, and identifies the user or team an integration acts for.
## Start with authentication
Tokens
Choose between personal, team, and OAuth access tokens, then store and rotate them safely.
OAuth and OpenID Connect
Request a client, discover the provider, and implement authorization and token refresh.
How scopes work
Understand parent permissions, read and write inheritance, and partial OAuth grants.
Scopes
Request the profile, email, and team information your application uses.
## Continue to a product API
Authentication establishes who the integration acts for. The product API controls what it can do next.
- [Domain Chief](/developers/domainchief) for domains, contacts, DNS records, redirects, registrations, and transfers.
- [Cert Chief](/developers/certchief) for certificate monitoring and TLS server tests.
- [Deploy Chief](/developers/deploychief) for applications, servers, environments, and deployments.
- [Tny](/developers/tny) for shortened links, custom domains, and URL utilities.