# Online checkout

Merchants do not always need custom API integration. In order to accept payments, Merchant can save time and integrate our [online checkout](https://demo-business-sandbox.cryptopay.me/).

An online checkout is a ready-made tool based on [invoices](https://developers.cryptopay.me/guides/invoices), that you can plug into your website and start accepting cryptocurrency payments without integrating the API.

The checkout is designed both for desktop and mobile web browsers. It can be used as a pop-up or embedded part of your website.

Check this demo [https://demo-business-sandbox.cryptopay.me](https://demo-business-sandbox.cryptopay.me/) to see what it looks like.

<figure><img src="https://610376622-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LcumCsZ6ZxEPn6jqlMH%2Fuploads%2FRjyI5vRefA7kBQlic68g%2F%D1%87%D0%B8%D0%BA%D0%B0%D1%83.png?alt=media&#x26;token=c89e2b0d-1108-4a5b-896a-987d5969ebf4" alt=""><figcaption></figcaption></figure>


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developers.cryptopay.me/guides/invoices/payment-widget.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.