# Send Kakao Message

{% hint style="info" %}
The HTTP API can only be used in a server environment.
{% endhint %}

You can use the HTTP API to send API-triggered Kakao Message campaigns.

Authentication is performed using the SDK Key.

* Add the SDK Key to the HTTP header as shown below.
* You can find the SDK Key in the Hackle Dashboard under [SDK Integration Info](https://dashboard.hackle.io/config/sdk-setting).

```http
X-HACKLE-API-KEY: {YOUR_SERVER_SDK_KEY}
```

### Request

{% hint style="warning" %}

* The target users must meet the "Send Target" conditions configured in the Kakao Message campaign.\
  Kakao Messages will not be sent to users who do not meet those conditions.
* Phone number collection per userId is required to send Kakao Messages.\
  Refer to the [guide document](/en/crm-marketing/crm-properties/collect-phone-number.md).
  {% endhint %}

```http
POST https://api.hackle.io/v1/kakao-message/trigger/send
```

#### Request Body

| Field       | Type                 | Required | Description                          | Restrict                       |
| ----------- | -------------------- | -------- | ------------------------------------ | ------------------------------ |
| campaignKey | number               | O        | Campaign Key for the Kakao Message   |                                |
| users       | array`<User object>` | O        | List of users to receive the message | **Maximum list length is 50.** |

**User Object**

| Field         | Type   | Required | Description                                                                                                                                                                  |
| ------------- | ------ | -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| userId        | string | O        | User ID                                                                                                                                                                      |
| apiProperties | object | X        | Key-value pairs used for [Kakao Message personalization](https://docs.hackle.io/en/development-guide/http-api/pages/Z8UZ9l6RA0WLjIEyrBBh#개인화-메시지). key(string)-value(string) |

#### Example

```shell
curl -i -X POST \
  'https://api.hackle.io/v1/kakao-message/trigger/send' \
  -H 'X-HACKLE-API-KEY: YOUR_API_KEY_HERE' \
  -H 'Content-Type: application/json' \
  -d '{
    "campaignKey": 1,
    "users": [
      {
        "userId": "eb24b2d8-21a3-4e95-b801-626ba0904e01",
        "apiProperties": {
          "productNumber": "123"
        }
      }
    ]
  }'
```

### Response

The API returns a Success Response or Error Response object as the result of the send request.

#### Success (200)

{% hint style="info" %}
**A successful response to the Kakao Message send request does not guarantee that the user actually received the Kakao Message.**

Statistics on final delivery success can be checked in the Dashboard.
{% endhint %}

| Field      | Data Type | Description                                                    |
| ---------- | --------- | -------------------------------------------------------------- |
| dispatchId | string    | Unique UUID for the Kakao Message request triggered by the API |
| message    | string    | Contains the value "success".                                  |

**example**

```json
{
    "dispatchId": "bac3da45-f6e3-44ea-989e-e0fa0ffc9f5c",
    "message": "success"
}
```

#### Error

| Field   | Data Type | Description                    |
| ------- | --------- | ------------------------------ |
| code    | string    | A specific response error code |
| message | string    | A message describing the error |

**example**

```json
{
    "code": "INVALID_API_KEY",
    "message": "Invalid API key"
}
```

**error case**

| Http Status | Code                      | Message                                                    | Description                                                                  |
| ----------- | ------------------------- | ---------------------------------------------------------- | ---------------------------------------------------------------------------- |
| 401         | INVALID\_API\_KEY         | "Invalid API key"                                          | When an invalid API KEY is included in the header                            |
| 401         | API\_KEY\_NOT\_FOUND      | "API key not found"                                        | When no API KEY is included in the header                                    |
| 400         | EXCEED\_USER\_MAX\_LENGTH | "Max input length exceeded"                                | When the maximum number of target users that can be sent at once is exceeded |
| 400         | CAMPAIGN\_NOT\_FOUND      | "Could not find kakao message campaign with the given key" | When no API-triggered campaign exists matching the given campaign key        |
| 400         | EMPTY\_IDENTIFIER         | "At least one identifier should be given"                  | When the userId is missing from the target user info for the Kakao send      |


---

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```
GET https://docs.hackle.io/en/development-guide/http-api/api-kakao-message-send.md?ask=<question>
```

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