---
title: "Purchase KeyLocker signatures"
source_url: https://dev.digicert.com/certcentral-apis/services-api/orders/purchase-keylocker-signatures.html
api_method: PUT
api_endpoint: "/reports/v1/report/types/orders/supported-columns"
api_url: "https://api.digicert.com/reports/v1/report/types/orders/supported-columns"
---

**PUT** `https://api.digicert.com/reports/v1/report/types/orders/supported-columns`

Use this endpoint to purchase signature units***** for your code signing certificate order using the [DigiCert KeyLocker](https://dev.digicert.com/md/certcentral-apis/services-api/orders/order-code-signing-certificate.md#section-idm465267767396003370940554419) provisioning method.


> **Important**
>
> **Items to note about purchasing signature units**
>
> - API key must have elevated permissions as only administrators and managers can purchase signatures. See [Use the right key.](https://dev.digicert.com/md/certcentral-apis/services-api/best-practices.md#UUID-cdf0db0f-896b-82ee-1fc7-5d8a518f1923)
> - Signature unit purchases not yet available for subaccounts.
> - *****A signature unit equals 1,000 signatures (i.e., if you purchase 3 signature units, 3,000 signatures are added to your code signing order).


## Example requests and responses

## cURL

```
curl --request PUT 'https://www.digicert.com/services/v2/order/certificate/123456789/buy-keylocker-signature-unit' \--header 'X-DC-DEVKEY: {{api_key}}' \--header 'Content-Type: application/json' \--data-raw '{  "signature_units": "1",  "payment_method": "profile",  "payment_profile": {    "id": "165861"  }}'curl --request GET 'https://api.digicert.com/reports/v1/report/types/orders/supported-columns' \
--header 'X-DC-DEVKEY: {{api_key}}' \
--header 'Content-Type: application/json' \
--data-raw '{  
  "signature_units": "1",  
  "payment_method": "profile",  
  "payment_profile": {
    "id": "165861"  
  }
}'
```

## 200 OK

```
// empty
```

## Request parameters

<table class="params-table">
<thead>
<tr>
<th>Name</th>
<th>Req/Opt</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>signature_units</td>
<td>required</td>
<td>integer</td>
<td>Number of signature units<strong>*</strong> to purchase. Value must be greater than 0.<br><strong>*</strong>A signature unit equals 1,000 signatures (i.e., if you purchase 1 signature unit your code signing order will be allotted 1,000 additional signatures).</td>
</tr>
<tr>
<td>payment_method</td>
<td>required</td>
<td>string</td>
<td>Payment method for the order.<br>Allowed values:<br><ul><li><code>balance</code> (default): Pay with account balance. Returns an error if the option to bill to account balance is disabled for the account, or if the account balance has insufficient funds. <a href="https://docs.digicert.com/en/certcentral/manage-account/set-up-account-credit.html" target="_blank" rel="noopener noreferrer">Learn how to debit purchases against your CertCentral account balance</a>.</li><li><code>profile</code>: Pay with the account’s default credit card. Returns an error if no default credit card is configured for the account. <a href="https://docs.digicert.com/en/certcentral/manage-account/add-a-credit-card-to-your-certcentral-account.html" target="_blank" rel="noopener noreferrer">Learn how to set up a default credit card</a>.</li></ul></td>
</tr>
</tbody>
</table>