---
title: "Add gateway response header"
slug: "apigateway-postheaders"
updated: 2026-09-17T09:35:41Z
published: 2026-09-17T09:35:41Z
canonical: "api.ncloud-docs.com/apigateway-postheaders"
---

> ## 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.

# Add gateway response header

Available in Classic and VPC

Add a custom header to the gateway response you have.

## Request

The following describes the request format for the endpoint. The request format is as follows:

| Method | URI |
| --- | --- |
| POST | /api/v1roducts/{product-id}/apis/{api-id}/responses/{response-type}/headers |

### Request headers

For information about the headers common to all API Gateway APIs, see [API Gateway request headers](/docs/en/ai-application-service-apigateway#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request path parameters

You can use the following path parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `product-id` | String | Required | Product ID that the API belongs to - 1 - 10 - See [View product list](/docs/en/apigateway-product-getproductlist) |
| `api-id` | String | Required | ID of the API whose response header you want to add - 1 - 10 characters - See [View API](/docs/en/apigateway-api-apis) |
| `response-type` | String | Required | Gateway response type - 1 - 45 characters - See [View gateway response](/docs/en/apigateway-getresponses) |

### Request syntax

The request syntax is as follows.

```
{
  "headerName" : "headerName",
  "headerValue" : "headerValue"
}
```

### Request body

The following describes the request body.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `headerName` | String | Required | Name of the header to add |
| `headerValue` | String | Required | Header value |

### Request example

The following is a sample request.

```
curl --location --request POST 'https://apigateway.apigw.ntruss.com/api/v1/products/********o9/apis/cvcohvd2xj/responses/AUTHENTICATION_FAILED/headers' \
--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' \
--data '{
  "headerName" : "codeType",
  "headerValue" : "normal"
}'
```

## Response

The following describes the response format.

### Response syntax

The response syntax is as follows.

```
{
  "apiId" : "apiId",
  "responseType" : "responseType",
  "headerName" : "headerName",
  "headerValue" : "headerValue"
}
```

### Response status codes

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

### Response example

The following is a sample response.

```
{
    "apiId": "cvcohvd2xj",
    "responseType": "AUTHENTICATION_FAILED",
    "headerName": "codeType",
    "headerValue": "normal"
}
```