---
title: "Download certificate (serial number)"
source_url: https://dev.digicert.com/certcentral-apis/services-api/ct-log-monitoring/download-certificate-serial-number.html
api_method: GET
api_endpoint: "/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}/"
api_url: "https://www.digicert.com/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}?issuer={{issuer}}"
---

**GET** `https://www.digicert.com/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}?issuer={{issuer}}`

Use this endpoint to download the certificate's serial number associated with a CT-logged Secure Site Pro SSL certificate.


> **Note**
>
> This endpoint does not download the certificate itself. This endpoint returns the serial number information of a CT-logged Secure Site Pro SSL certificate. This is the serial number assigned to the certificate on issuance.
> This endpoint returns serial number only when CT log monitoring is enabled in your CertCentral account. For more information, see [Enable CT log monitoring](https://dev.digicert.com/md/certcentral-apis/services-api/ct-log-monitoring/enable-ct-log-monitoring.md).


## Example requests and response

**cURL**

```bash
curl -X GET \
  'https://www.digicert.com/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}?issuer={{issuer}}' \
  -H 'Content-Type: application/json' \
  -H 'X-DC-DEVKEY: {{api_key}}'
```

**Python**

```python
import requests

url = "https://www.digicert.com/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}?issuer={{issuer}}"

payload = ""
headers = {
    'X-DC-DEVKEY': "{{api_key}}",
    'Content-Type': "application/json"
    }

response = requests.request("GET", url, data=payload, headers=headers)

print(response.text)
```

**Go**

```go
package main

import (
	"fmt"
	"net/http"
	"io/ioutil"
)

func main() {

	url := "https://www.digicert.com/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}?issuer={{issuer}}"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("X-DC-DEVKEY", "{{api_key}}")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

**NodeJS**

```javascript
var request = require("request");

var options = { method: 'GET',
  url: 'https://www.digicert.com/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}?issuer={{issuer}}',
  headers: 
   { 'Content-Type': 'application/json',
     'X-DC-DEVKEY': '{{api_key}}' } };

request(options, function (error, response, body) {
  if (error) throw new Error(error);

  console.log(body);
});
```


## 200 OK

```json
{
    "pem": "<certificate in pem format>"
}
```

## Request URL query strings

URL query strings are appended to the endpoint URL using a ?.

**For example:**

```markup
https://www.digicert.com/services/v2/ctmonitor/{{order_id}}/ct-cert/{{serial_id}}?issuer={{issuer}}
```

<table class="params-table">
<thead>
<tr>
<th>Name</th>
<th>Req/Opt</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>order_id</td>
<td>required</td>
<td>integer</td>
<td>ID of the order associated with the certificate event. <br>Example: <code>1313718630</code> </td>
</tr>

<tr>
<td>serial_id</td>
<td>required</td>
<td>string</td>
<td>Serial number assigned to the certificate on issuance. <br>Example: <code>2bf1cd8a28fef721f67011d6231c16e</code><br>An order can include multiple certificates. Since the serial number is unique to each certificate, both <code>order_id</code> and <code>serial_id</code> are required to identify the correct certificate.</td>
</tr>


<tr>
<td>issuer</td>
<td>required</td>
<td>string</td>
<td>Brand name of the certificate authority that issued the certificate. <br>Examples:<ul>
<li>RapidSSL</li>
<li>Let's Encrypt</li>
<li>Sectigo</li>
<li>DigiCert</li>
<li>Thawte</li>
<li>GeoTrust</li>
</ul></td>
</tr>
</tbody>
</table>

## Response parameters

<table class="params-table">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>pem</td>
<td>string</td>
<td>TLS/SSL certificate in PEM format.</td>
</tr>
</tbody>
</table>