> ## Documentation Index
> Fetch the complete documentation index at: https://polar-rishi-raj-jain-patch-2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Modern Billing for Developers & Designers

> An open source Merchant of Record with 20% lower fees

<img height="200" src="https://mintlify.s3.us-west-1.amazonaws.com/polar-rishi-raj-jain-patch-2/assets/welcome.png" />

Polar is purpose-built for developers, designers and startups to monetize their
digital products and software with ease.

**Highlighted Features**

<AccordionGroup>
  <Accordion title="Integrate with 5 Lines of Code" icon="code">
    We obsess over developer ergonomics and ease. Just checkout our
    [Next.js](/guides/nextjs) guide below.

    ```bash
    pnpm install @polar-sh/nextjs zod
    ```

    ```typescript
    // checkout/route.ts
    import { Checkout } from "@polar-sh/nextjs";

    export const GET = Checkout({
      accessToken: process.env.POLAR_ACCESS_TOKEN,
      successUrl: process.env.SUCCESS_URL,
    });
    ```
  </Accordion>

  <Accordion title="First-class No-Code Support" icon="gauge">
    Our dashboard is built to be delightfully intuitive and easy to use even
    without ever integrating our API.

    See how you can easily create powerful [Checkout Links](/features/checkout/links).
  </Accordion>

  {" "}

  <Accordion title="Merchant of Record" icon="globe">
    Sell internationally and leave the headache of calculating, capturing and
    remitting taxes world-wide to us as your [Merchant of
    Record](/merchant-of-record/introduction).
  </Accordion>

  {" "}

  <Accordion title="20% Lower Fees" icon="badge-percent">
    * No fixed monthly costs - 4% + 40¢ on transactions - we earn when you do -
      Some payments may be subject to additional [fees](/merchant-of-record/fees) -
      Large or fast-growing business? [Reach out](mailto:support@polar.sh) to us for
      volume discounts
  </Accordion>

  <Accordion title="Automated Benefits (Entitlements)" icon="battery-bolt">
    Focus on building your core product vs. common product benefits.

    Use our built-in automations for:

    * [File Downloads](/features/benefits/file-downloads)
    * [License Keys](/features/benefits/license-keys)
    * [GitHub Repo Access](/features/benefits/github-access)
    * [Discord Access](/features/benefits/github-access)
  </Accordion>

  <Accordion title="Powerful Checkout" icon="money-bill">
    <img className="block dark:hidden" src="https://mintlify.s3.us-west-1.amazonaws.com/polar-rishi-raj-jain-patch-2/assets/introduction/checkout.light.png" />

    <img className="hidden dark:block" src="https://mintlify.s3.us-west-1.amazonaws.com/polar-rishi-raj-jain-patch-2/assets/introduction/checkout.dark.png" />

    Offer a powerful and custom branded checkout in minutes.

    * [Checkout Links](/features/checkout/links)
    * [Embedded Checkout](/features/checkout/embed) on your site
    * [Checkout API](/features/checkout/embed) to programmatically create
      dynamic sessions
  </Accordion>

  <Accordion title="Open Source" icon="osi">
    * Our product, code and docs are available on [GitHub](https://github.com/polarsource/polar) (Apache 2.0)
    * 36 contributors and growing (Contributions welcome)
    * Feature requests, feedback and issues - all in public
    * Self-hosting while possible is not supported or encouraged (no MoR benefits)
  </Accordion>
</AccordionGroup>

## Quickstart

Head over to [polar.sh/signup](https://polar.sh/login) to create an account.

<img className="block dark:hidden" src="https://mintlify.s3.us-west-1.amazonaws.com/polar-rishi-raj-jain-patch-2/assets/create-org.light.png" />

<img className="hidden dark:block" src="https://mintlify.s3.us-west-1.amazonaws.com/polar-rishi-raj-jain-patch-2/assets/create-org.dark.png" />

[Sign up](https://polar.sh/signup) to Polar easily using GitHub, Google or email. Create an organization for your products, customers and checkouts.

## Using the Polar SDK

Polar comes in the form of an SDK, and is designed to be used in your existing backend infrastructure. We currently have SDKs for:

* [JavaScript/TypeScript](/integrate/sdk/typescript)
* [Python](/integrate/sdk/python)
* [Go](/integrate/sdk/golang)
* [PHP](/integrate/sdk/php)

Navigate to the relevant SDK page to learn more about the SDK and how to use it. In this particular guide, we'll focus on using the JavaScript/TypeScript SDK.

## Using a Polar Adapter

Polar's Adapters are small framework-specific utilities which makes it super-easy to integrate Polar.

They can be used to:

* Create Checkout Sessions
* Create a Customer Portal
* Listen for Polar Webhooks (e.g. for events like a customer being created, a subscription being updated, etc.)

We currently have adapters for the most popular frameworks:

* [Next.js](/integrate/sdk/adapters/nextjs)
* [BetterAuth](/integrate/sdk/adapters/better-auth)
* [Express](/integrate/sdk/adapters/express)
* [Fastify](/integrate/sdk/adapters/fastify)
* [Hono](/integrate/sdk/adapters/hono)
* [Deno](/integrate/sdk/adapters/deno)
* [Nuxt](/integrate/sdk/adapters/nuxt)
* [Remix](/integrate/sdk/adapters/remix)
* [SvelteKit](/integrate/sdk/adapters/sveltekit)
* [Tanstack Start](/integrate/sdk/adapters/tanstack-start)
* [Elysia](/integrate/sdk/adapters/elysia)
* [Astro](/integrate/sdk/adapters/astro)
* [Laravel](/integrate/sdk/adapters/laravel)