# What is tiun

## The commercial backend for SaaS, AI and digital products.

One system for authentication, payments, and customer data.\
No backend to build. No payment UI to design. Integrate once and go live.

[Get started](https://docs.tiun.io/quickstart) | [How it works](https://docs.tiun.io/how-it-works)

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## Why tiun

* **No backend required** — tiun is the backend. Authentication, billing, and access control are handled for you.
* **No UI to design** — Checkout, login, and paywall overlays are built in and fully managed.
* **One SDK, all product types** — Subscriptions and time-based billing through the same integration.
* **Go live in a day** — Install the SDK, create a product in the dashboard, and you're ready to charge.

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#### SDK integration

For developers building with JavaScript. Install the SDK, wire up checkout, and go live.

[Quickstart](https://docs.tiun.io/quickstart) | [SDK reference](https://docs.tiun.io/documentation/sdk)
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#### Agent integration (MCP)

For AI agents that handle commerce on behalf of users. Connect via MCP.

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MCP integration docs are coming soon.
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## Community

Join the conversation, ask questions, and share what you're building.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Discord</strong></td><td>Ask questions, get help, and connect with other developers building on tiun.</td><td><a href="https://discord.gg/NCggN2ExZ9">https://discord.gg/NCggN2ExZ9</a></td></tr></tbody></table>