# Dhuri One > The control plane for a SaaS product: hosted sign-in, tenancy, roles and entitlements behind one API. This file is an index. Each page is available as markdown at the URL given below, and the whole set is inlined in /llms-full.txt. - [Introduction](https://dhuri.recurlytics.com/docs/introduction.md): What Dhuri One is, the objects it holds, and the one call that answers most product questions. - [Quickstart](https://dhuri.recurlytics.com/docs/quickstart.md): From an empty organization to a working access check in about ten minutes. - [API keys](https://dhuri.recurlytics.com/docs/api-keys.md): How a key authenticates, what it is scoped to, and how environments are kept apart. - [Users & teams](https://dhuri.recurlytics.com/docs/users.md): The people in your product and the teams they belong to. - [Roles & permissions](https://dhuri.recurlytics.com/docs/access.md): Naming actions, grouping them into roles, and assigning them to people or teams. - [Features & plans](https://dhuri.recurlytics.com/docs/entitlements.md): Declaring what a plan includes, handing plans out, and overriding a single case. - [Metered usage & limits](https://dhuri.recurlytics.com/docs/usage.md): Counting consumption atomically, refusing it at the cap, and capping in one call. - [Sign-in & OIDC](https://dhuri.recurlytics.com/docs/sign-in.md): A hosted page per environment, or your own UI against a real OpenID Connect issuer. - [API reference](https://dhuri.recurlytics.com/docs/api-reference.md): Every endpoint, grouped, with the shape of what it accepts and returns. - [Errors & pagination](https://dhuri.recurlytics.com/docs/errors.md): The problem+json body, the stable codes, and how to page through a list. - [Choose your sign-in approach](https://dhuri.recurlytics.com/guides/sign-in-approach.md): Hosted page, your own UI, or both — and how to change your mind later. - [Migrate from another provider](https://dhuri.recurlytics.com/guides/migrate.md): Moving existing users in without asking anyone to reset a password. - [Production checklist](https://dhuri.recurlytics.com/guides/production-checklist.md): The things that are cheap to do now and expensive to discover later.