# Overview

The tiun SDK is a lightweight JavaScript package that lets you integrate payments, subscriptions, and access control into any website or app.

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**NPM:** [@tiun/sdk](https://www.npmjs.com/package/@tiun/sdk)
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## When to use the SDK

Use the tiun SDK when you need to:

* **Accept payments** — Open a checkout flow and let users purchase products or subscriptions directly from your site.
* **Control access** — Gate content behind a paywall, whether time-based or subscription-based.
* **Manage user sessions** — Let users log in, log out, and persist their session across visits.

The SDK runs entirely on the client side. Install it via npm, call `init()` once, and you're ready to go — no server-side code or manual script tags required.

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Ready to get started? Head to [Installation](/sdk/getting-started/installation.md) to add the SDK to your project.
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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.tiun.io/sdk/getting-started/readme.md?ask=<question>
```

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