> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.getunleash.io/api/register/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.getunleash.io/_mcp/server.

# Register

POST https://edge.unleash-instance.example.com/api/client/register
Content-Type: application/json

Reference: https://docs.getunleash.io/api/register

## Authentication

- `Authorization` header (required) — API Key authentication via header

## Request

### Body (application/json)

This endpoint expects a ClientApplication.

- `appName` (string, required)
- `interval` (integer, required)
- `started` (string, required)
- `strategies` (list of string, required)
- `platformName` (string, optional, nullable)
- `platformVersion` (string, optional, nullable)
- `sdkFlavor` (string, optional, nullable)
- `sdkFlavorVersion` (string, optional, nullable)
- `sdkType` (enum, optional, nullable)
  - Allowed values: `frontend`, `backend`
- `sdkVersion` (string, optional, nullable)
- `yggdrasilVersion` (string, optional, nullable)
- `connectVia` (list of ConnectVia, optional, nullable)
- `connectionId` (string, optional, nullable)
- `environment` (string, optional, nullable)
- `instanceId` (string, optional, nullable)
- `projects` (list of string, optional, nullable)

## Response

### 202

Accepted client application registration

## Errors

### 403 Forbidden Error

Was not allowed to register client application

- `any`

## Types

### ConnectVia

- `appName` (string, required)
- `instanceId` (string, required)

## Examples

**Request**

```json
{
  "appName": "string",
  "interval": 1,
  "started": "2024-01-15T09:30:00Z",
  "strategies": [
    "string"
  ]
}
```

**Response**

```json
{}
```

**SDK Code**

```python
import requests

url = "https://edge.unleash-instance.example.com/api/client/register"

payload = {
    "appName": "string",
    "interval": 1,
    "started": "2024-01-15T09:30:00Z",
    "strategies": ["string"]
}
headers = {
    "Authorization": "<apiKey>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://edge.unleash-instance.example.com/api/client/register';
const options = {
  method: 'POST',
  headers: {Authorization: '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"appName":"string","interval":1,"started":"2024-01-15T09:30:00Z","strategies":["string"]}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://edge.unleash-instance.example.com/api/client/register"

	payload := strings.NewReader("{\n  \"appName\": \"string\",\n  \"interval\": 1,\n  \"started\": \"2024-01-15T09:30:00Z\",\n  \"strategies\": [\n    \"string\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "<apiKey>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://edge.unleash-instance.example.com/api/client/register")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"appName\": \"string\",\n  \"interval\": 1,\n  \"started\": \"2024-01-15T09:30:00Z\",\n  \"strategies\": [\n    \"string\"\n  ]\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://edge.unleash-instance.example.com/api/client/register")
  .header("Authorization", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"appName\": \"string\",\n  \"interval\": 1,\n  \"started\": \"2024-01-15T09:30:00Z\",\n  \"strategies\": [\n    \"string\"\n  ]\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://edge.unleash-instance.example.com/api/client/register', [
  'body' => '{
  "appName": "string",
  "interval": 1,
  "started": "2024-01-15T09:30:00Z",
  "strategies": [
    "string"
  ]
}',
  'headers' => [
    'Authorization' => '<apiKey>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://edge.unleash-instance.example.com/api/client/register");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"appName\": \"string\",\n  \"interval\": 1,\n  \"started\": \"2024-01-15T09:30:00Z\",\n  \"strategies\": [\n    \"string\"\n  ]\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = [
  "appName": "string",
  "interval": 1,
  "started": "2024-01-15T09:30:00Z",
  "strategies": ["string"]
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://edge.unleash-instance.example.com/api/client/register")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```