---
title: "RegisterPrivateKey"
slug: "security-certificatemanager-registerprivatekey"
updated: 2026-10-08T04:19:21Z
published: 2026-10-08T04:19:21Z
canonical: "api.ncloud-docs.com/security-certificatemanager-registerprivatekey"
---

> ## 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.

# RegisterPrivateKey

Available in Classic and VPC

Register a private key of a certificate.

## Request

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

| Method | URI |
| --- | --- |
| POST | /api/v2/certificate/registPrivateKey |

### Request headers

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

### Request body

You can include the following data in the body of your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `certificateNo` | Integer | Required | Certificate number |
| `privateKey` | String | Required | PEM file of certificate private key |

### Request example

The request example is as follows:

```
curl --location --request POST 'https://certificatemanager.apigw.ntruss.com/api/v2/certificate/registPrivateKey' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
--header 'Content-Type: application/json' \
--header 'accept: application/json' \
--data '{
  "certificateNo": 1234,
  "privateKey": "-----BEGIN RSA PRIVATE KEY-----\nMIIEpAIBAAKCAQEA...\n-----END RSA PRIVATE KEY-----"
}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `returnCode` | String | - | Response code |
| `returnMessage` | String | - | Response message |
| `totalRows` | Integer | - | Total number of lists searched |

### Response status codes

For information about the response status codes common to all Certificate Manager APIs, see [Certificate Manager response status codes](/docs/en/security-certificatemanager#%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:

```
{
    "returnCode": "0",
    "returnMessage": "Success",
    "totalRows": 0
}
```