---
title: "addLoadBalancerSslCertificate (Deprecated)"
slug: "networking-loadbalancing-addloadbalancersslcertificate"
updated: 2026-09-17T10:12:30Z
published: 2026-09-17T10:12:30Z
canonical: "api.ncloud-docs.com/networking-loadbalancing-addloadbalancersslcertificate"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# addLoadBalancerSslCertificate (Deprecated)

Available in Classic

Add a SSL certificate used by a load balancer.

Note

Since the addLoadBalancerSslCertificate API has been deprecated, use [createExternalCertificate](/docs/en/security-certificatemanager-createexternalcertificate).

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| POST | /addLoadBalancerSslCertificate |

### Request headers

For information about the headers common to all Load Balancer APIs, see [Load Balancer request headers](/docs/en/networking-loadbalancing#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request query parameters

You can use the following query parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `certificateName` | String | Required | Name of certificate to add to the load balancer |
| `privateKey` | String | Required | Certificate secret key |
| `publicKeyCertificate` | String | Required | Certificate public key |
| `certificateChain` | String | Optional | Chain certificate - Required if a chain certificate is included among issued certificates |

### Request example

The request example is as follows:

```
curl --location --request POST 'https://ncloud.apigw.ntruss.com/loadbalancer/v2/addLoadBalancerSslCertificate?certificateName=YOUR_CERTIFICATE&privateKey=YOUR_PRIVATE_KEY&publicKeyCertificate=YOUR_PUBLIC_KEY' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}'
```

## Response

This section describes the response format.

### Response body

See [SslCertificate](/docs/en/common-apidatatype-sslcertificate) for the response body.

### Response status codes

For information about the HTTP status codes common to all Load Balancer APIs, see [Load Balancer response status codes](/docs/en/networking-loadbalancing#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

```
<addLoadBalancerSslCertificateResponse>
  <requestId>3c860c5d-10b0-464d-b7da-c464ae31c042</requestId>
  <returnCode>0</returnCode>
  <returnMessage>success</returnMessage>
  <totalRows>1</totalRows>
  <sslCertificateList>
    <sslCertificate>
      <certificateName>YOUR_CERTIFICATE</certificateName>
      <privateKey>YOUR_PRIVATE_KEY</privateKey>
      <publicKeyCertificate>YOUR_PUBLIC_KEY</publicKeyCertificate>
      <certificateChain></certificateChain>
    </sslCertificate>
  </sslCertificateList>
</addLoadBalancerSslCertificateResponse>
```

### Response status codes

The following describes the response status codes.

| HTTP status code | Code | Message | Description |
| --- | --- | --- | --- |
| 400 | 26036 | Not found certificateName OR privateKey OR publicKeyCertificate Please check your input parameter. | Unable to find the certificate name or the certificate's secret/public key |
| 400 | 26041 | The certificate name already existent. | Certificate name can't be duplicated. |