# Authentication

LeaderOS uses a HTTP header to authenticate requests with an API key.\
The header is called `X-Api-Key` and the value is the API key.

{% hint style="info" %}
The API key can be found in the LeaderOS settings.
{% endhint %}

#### Examples

{% tabs %}
{% tab title="cURL" %}

#### GET Request

```
curl https://yourwebsite.com/api/store/products
   -H "X-Api-Key: YOUR_API_KEY"
```

#### POST Request

```
curl https://yourwebsite.com/api/store/products
   -H "X-Api-Key: YOUR_API_KEY"
   -H "Content-Type: multipart/form-data"
   -X POST
   -d "username=test&password=test"
```

{% endtab %}

{% tab title="PHP" %}

#### GET Request

<pre class="language-php"><code class="lang-php">// GET
<strong>$ch = curl_init();
</strong>curl_setopt($ch, CURLOPT_URL, "https://yourwebsite.com/api/store/products");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$headers = [
    'X-Api-Key: YOUR_API_KEY'
];
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

$output = curl_exec ($ch);
curl_close ($ch);
</code></pre>

#### POST Request

```php
// POST
curl_setopt($ch, CURLOPT_URL, "https://yourwebsite.com/api/auth/login");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, [
    'username' => 'test',
    'password' => 'test'
]);

$headers = [
    'X-Api-Key: YOUR_API_KEY'
];
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

$output = curl_exec ($ch);
curl_close ($ch);
```

{% endtab %}

{% tab title="JavaScript" %}

#### GET Request

```javascript
const instance = axios.create({
  baseURL: 'https://yourwebsite.com',
  headers: {
    'X-API-KEY': 'YOUR_API_KEY',
  },
});

// GET
instance.get('/api/store/products');
```

#### POST Request

```javascript
const instance = axios.create({
  baseURL: 'https://yourwebsite.com',
  headers: {
    'X-API-KEY': 'YOUR_API_KEY',
  },
});

// POST
instance.post('/api/auth/login', {
  username: 'test',
  password: 'test'
}, {
  headers: {
    'Content-Type': 'multipart/form-data',
  }
});
```

{% endtab %}
{% endtabs %}