***

title: Extend your solution
published: true
---------------------

For clean Markdown of any page, append .md to the page URL. For a complete documentation index, see https://docs.payroc.com/essentials-guides/payroc-cloud/llms.txt. For full documentation content, see https://docs.payroc.com/essentials-guides/payroc-cloud/llms-full.txt.

After you configure your payment device to run a sale, you can also extend your integration to include the following:

* [**Capture a signature**](/guides/take-payments/payroc-cloud/extend-your-solution/capture-signature.mdx) - Capture a signature on a payment device.
* [**Run an unreferenced refund**](/guides/take-payments/payroc-cloud/extend-your-solution/run-unreferenced-refund.mdx) - Run a refund that isn't linked to a transactions.
* [**Run a referenced refund**](/guides/take-payments/payments/refunds) - Run a refund that is linked to a transaction.
* [**Reverse a transaction**](/guides/take-payments/payments/refunds/reversals) - Cancel a transaction in an open batch.

## Before you begin

### Bearer tokens

Use our Identity Service to generate a Bearer token to include in the header of your requests. To generate your Bearer token, complete the following steps:

1. Include your API key in the x-api-key parameter in the header of a POST request.
2. Send your request to [https://identity.payroc.com/authorize](https://identity.payroc.com/authorize).

<Note>
  **Note:** You need to generate a new Bearer token before the previous Bearer token expires.
</Note>

#### Example request

```bash
curl --location --request POST 'https://identity.payroc.com/authorize' --header 'x-api-key: <api key>'
```

#### Example response

If your request is successful, we return a response that contains your Bearer token, information about its scope, and when it expires.

```json
{
  "access_token": "eyJhbGc....adQssw5c",
  "expires_in": 3600,
  "scope": "service_a service_b",
  "token_type": "Bearer"
}
```

### Headers

To create the header of each POST request, you must include the following parameters:

* **Content-Type:** Include application/json as the value for this parameter.
* **Authorization:** Include your Bearer token in this parameter.
* **Idempotency-Key:** Include a UUID v4 to make the request idempotent.

```bash
curl
-H "Content-Type: application/json"
-H "Authorization: <Bearer token>"
-H "Idempotency-Key: <UUID v4>"
```

### Errors

If your request is unsuccessful, we return an error. For more information about errors, see [Errors](/api/errors).