# Payment links

Merchants can use payment links instead of custom API integration to accept payments.

Payment link is a tool which can be flexibly integrated into payment and sales scripts. Payment link can create multiple invoices.

Examples of usage:

* The "Payment by Crypto" button from the shopping cart
* QR code for cryptocurrency payment on the web, a PDF or a paper version of the invoice
* Sending the payment link to an online chat while talking to the client.

Here is an example of a USDT payment link created via merchant account: <https://catalog-business-sandbox.cryptopay.me/items/AX0KTD>

### How to use the payment link

1. Log in to your Cryptopay Business account
2. Navigate to Integration → Online checkout
3. Generate a new key
4. Create a link with the required GET parameters
5. Provide a link to the customer to make a payment.

To create a link, please use the domain depending on the environment:

| Environment | URL                                         |
| ----------- | ------------------------------------------- |
| Sandbox     | <https://pay-business-sandbox.cryptopay.me> |
| Production  | <https://business-pay.cryptopay.me>         |
|             |                                             |

Here's example of a payment link created via widget key - <https://pay-business-sandbox.cryptopay.me/?widgetKey=2b581fc0-41ff-4864-8b25-a4b2b7514b8f&priceAmount=10&priceCurrency=USD>

### Parameters

<table><thead><tr><th width="197">Parameter</th><th>Type</th><th>Usage</th><th>Description</th></tr></thead><tbody><tr><td>widgetKey</td><td>string</td><td>Required</td><td>Your widget key</td></tr><tr><td>priceAmount</td><td>number (double)</td><td>Required</td><td>Purchase amount</td></tr><tr><td>priceCurrency</td><td>string</td><td>Required</td><td>Purchase currency</td></tr><tr><td>customId</td><td>string</td><td>Optional</td><td>Purchase reference ID in your system</td></tr><tr><td>successRedirectUrl</td><td>string</td><td>Optional</td><td>URL of the page the user will be redirected to if the payment is successful.</td></tr><tr><td>unsuccessRedirectUrl</td><td>string</td><td>Optional</td><td>URL of the page the user will be redirected to in case of an error.</td></tr><tr><td>description</td><td>string</td><td>Optional</td><td>Purchase description</td></tr><tr><td>name</td><td>string</td><td>Optional</td><td>Purchase name</td></tr><tr><td>locale</td><td>string</td><td>Optional</td><td><p>Can be <code>en</code>, <code>de</code>, <code>fr</code>, <code>es</code>, <code>pt</code>, <code>ru</code> and <code>jp</code> which means English, German, French, Spanish, Portuguese, Russian or Japanese language. </p><p>If parameter is not set, the language will be taken from the browser settings.</p></td></tr></tbody></table>


---

# 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-links.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.