---
title: "SENS overview"
slug: "sens-overview"
tags: ["overview", "SENS"]
updated: 2026-09-17T09:35:47Z
published: 2026-09-17T09:35:47Z
canonical: "api.ncloud-docs.com/sens-overview"
---

> ## 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.

# SENS overview

Available in Classic and VPC

Simple & Easy Notification Service is a NAVER Cloud Platform service that enables the implementation of various notification message types (SMS, Alim Talk, Brand Message) without the need to build a separate message server. Simple & Easy Notification Service provides APIs for message delivery and management features in RESTful form.

## Common Simple & Easy Notification Service settings

The following describes commonly used request and response formats in Simple & Easy Notification Service APIs.

### Request

The following describes the common request format.

#### API URL

The request API URL is as follows:

```
https://sens.apigw.ntruss.com
```

#### Request headers

The following describes the request headers.

| Field | Required | Description |
| --- | --- | --- |
| `x-ncp-apigw-timestamp` | Required | This is the number of milliseconds that have elapsed since January 1, 1970 00:00:00 UTC. - Request is considered invalid if the timestamp differs from the current time by more than 5 minutes. - Unix timestamp format. |
| `x-ncp-iam-access-key` | Required | Access key issued on NAVER Cloud Platform - Issue and check access key: See [Create authentication key](/docs/en/common-ncpapi#1%EC%9D%B8%EC%A6%9D%ED%82%A4%EC%83%9D%EC%84%B1). - Issue and check access key for sub account: See [Create sub account](https://guide.ncloud-docs.com/docs/en/subaccount-use#%EC%84%9C%EB%B8%8C-%EA%B3%84%EC%A0%95-%EC%83%9D%EC%84%B1). |
| `x-ncp-apigw-signature-v2` | Required | Base64-encoded signature that encrypts the request information with a secret key that maps to the access key issued on NAVER Cloud Platform, using the HMAC encryption algorithm (HmacSHA256) - Issue and check secret key: See [Create authentication key](/docs/en/common-ncpapi#1%EC%9D%B8%EC%A6%9D%ED%82%A4%EC%83%9D%EC%84%B1). - Create signature: See [Create signature](/docs/en/common-ncpapi#%EC%8B%9C%EA%B7%B8%EB%8B%88%EC%B2%98%EC%83%9D%EC%84%B1). |
| `Content-Type` | Required | Request data format - `application/json` |

### Response

The following describes the common response format.

#### Response body

The response body includes the following data:

**error** error defines the API call failure information. The following describes error.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `status` | Integer | Required | Error code |
| `errors` | String | Required | Error name |
| `errorMessage` | String | Required | Error message |

#### Response status codes

The following describes the response status codes.

| HTTP status code | Message | Description |
| --- | --- | --- |
| 200 | OK | Request succeeded |
| 202 | Accepted | Request succeeded |
| 204 | No Content | Request succeeded |
| 400 | Bad Request | Invalid request |
| 401 | Unauthorized | Authentication failed |
| 403 | Forbidden | Access unauthorized |
| 404 | Not Found | Resource can't be found. |
| 429 | Too Many Requests | Request limit exceeded |
| 500 | Internal Server Error | Internal server error |

              Note

              

For information about the HTTP status codes common to NAVER Cloud Platform, see [Ncloud API response status codes](/docs/en/common-ncpapi#3%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

#### Response example

For response examples when a call is successful, see each API specification. The following is a sample response upon a failed call.

```
{
    "status": 403,
    "error": "Forbidden",
    "message": "Do not have access to this 'serviceId'"
}
```

## Simple & Easy Notification Service API

The following describes the APIs provided by the Simple & Easy Notification Service service.

### Project

The following describes the project-related APIs.

| API | Description |
| --- | --- |
| [Create project](/docs/en/sens-project-create) | Create a SENS project. |
| [Get project list](/docs/en/sens-project-list) | Get SENS project list. |
| [Get project](/docs/en/sens-project-get) | Get SENS project details. |
| [Modify project](/docs/en/sens-project-update) | Edit SENS project information. |
| [Delete project](/docs/en/sens-project-delete) | Delete SENS project. |

### SMS

The following describes the APIs related to SMS.

| API | Description |
| --- | --- |
| [Send message](/docs/en/sens-sms-send) | Send SMS/LMS/MMS message. |
| [Get message delivery list](/docs/en/sens-sms-list) | Get SMS/LMS/MMS message delivery list. |
| [Get message delivery result](/docs/en/sens-sms-get) | Get SMS/LMS/MMS message delivery result. |
| [Get message reservation status](/docs/en/sens-sms-reservation-status-get) | Get SMS/LMS/MMS message delivery reservation status. |
| [Cancel message reservation](/docs/en/sens-sms-reservation-delete) | Cancel SMS/LMS/MMS message delivery reservation. |
| [Register call block number](/docs/en/sens-sms-unsubscribe-create) | Register opt-out number for ad messages. |
| [Get call block number](/docs/en/sens-sms-unsubscribe-list) | Get opt-out number for ad messages. |
| [Delete call block number](/docs/en/sens-sms-unsubscribe-delete) | Delete opt-out number for ad messages. |
| [Upload Attachment](/docs/en/sens-sms-attachment-create) | Upload file for MMS delivery. |

### Alim Talk

The following describes the APIs related to Alim Talk.

| API | Description |
| --- | --- |
| [Get channel](/docs/en/sens-alimtalk-kakao-channel-get) | Get Alim Talk channel. |
| [Get template](/docs/en/sens-alimtalk-template-get) | Get Alim Talk template. |
| [Send message](/docs/en/sens-alimtalk-send) | Send Alim Talk message. |
| [Get message delivery list](/docs/en/sens-alimtalk-list) | Get Alim Talk delivery request. |
| [Get message delivery result](/docs/en/sens-alimtalk-get) | Get Alim Talk delivery result. |
| [Get message reservation status](/docs/en/sens-alimtalk-reservation-status-get) | Get Alim Talk delivery reservation status. |
| [Cancel message reservation](/docs/en/sens-alimtalk-reservation-delete) | Cancel Alim Talk delivery reservation. |

### Brand Message

The following describes the APIs related to Brand Message.

| API | Description |
| --- | --- |
| [Send message](/docs/en/sens-brandmessage-send) | Send Brand Message. |
| [Get message delivery list](/docs/en/sens-brandmessage-list) | Get Brand Message delivery list. |
| [Get message delivery result](/docs/en/sens-brandmessage-get) | Get Brand Message delivery result. |
| [Get template list](/docs/en/sens-brandmessage-template-list) | Get Brand Message template list. |
| [Upload image](/docs/en/sens-brandmessage-image-create) | Upload image to be used for Brand Message. |
| [Get image list](/docs/en/sens-brandmessage-image-list) | Get uploaded image list. |
| [Get image](/docs/en/sens-brandmessage-image-get) | Get uploaded image details. |
| [Delete image](/docs/en/sens-brandmessage-image-delete) | Delete uploaded image. |

## Simple & Easy Notification Service related resources

NAVER Cloud Platform provides a variety of related resources to help users better understand Simple & Easy Notification Service APIs.

- Simple & Easy Notification Service API guides
  - [Create signature](/docs/en/common-ncpapi#%EC%8B%9C%EA%B7%B8%EB%8B%88%EC%B2%98%EC%83%9D%EC%84%B1): How to create a signature to add to the request header
  - [Sub Account User Guides](https://guide.ncloud-docs.com/docs/en/subaccount-overview): How to issue the access key to be added to the request header
  - [Common Ncloud response status codes](/docs/en/common-ncpapi#3%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C): Information on common response status codes of NAVER Cloud Platform used by the Simple & Easy Notification Service service
- How to use the Simple & Easy Notification Service service
  - [Simple & Easy Notification Service user guide](https://guide.ncloud-docs.com/docs/en/sens-overview): How to use the Simple & Easy Notification Service service in the NAVER Cloud Platform console
  - [Ncloud user environment guide](https://guide.ncloud-docs.com/docs/en/environment-environment-1-1): Explore VPC and Classic environments and supported services.
  - [Pricing and features](https://www.ncloud.com/product/applicationService/sens): View pricing details and key capabilities.
  - [Latest service news](https://www.ncloud.com/intro/news?categoryCode=APP&serviceCode=SV_0065): The latest news on the Simple & Easy Notification Service service
  - [FAQs](https://www.ncloud.com/support/faq/prod?categoryCode2=APP&categoryCode3=SV_0065&page=1): Get answers to common Simple & Easy Notification Service questions.
  - [Contact Support](https://www.ncloud.com/support/question/general): Get help if you can't find what you need in the API guide.