# API Integration

You can use this API to create new sessions or get existing session link

### Generate hmac signature

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

```javascript
const crypto = require('crypto');

const generateHmac = (httpMethod, url, body, contentType, xAuthClient, secretKey) => {
  const requestUrl = new URL(url);
  const requestPath = requestUrl.pathname;
  const queryParams = requestUrl.searchParams.toString();

  const dataToHash = `${httpMethod}\n${requestPath}\n${queryParams}\n${xAuthClient}\n${contentType}\n${body}`;

  const hmac = crypto.createHmac('sha256', secretKey);
  hmac.update(dataToHash);
  return hmac.digest('hex');
};
let httpMethod = "POST";
const url = "https://start.faceverify.ai/api/v1/session";
const body = JSON.stringify({
    country: country,
    uniqueIdentifier,
});
const contentType = "application/json";
//xAuthClient is your apiKey
const xAuthClient = "xxx-xxx-xxx-xxx-xxx"
const secretKey = "xxx-xxx-xxx-xxx-xxx";
const hmacSignature = generateHmac(httpMethod,url,body,contentType,xAuthClient,secretKey);
console.log(hmacSignature);
```

{% endtab %}

{% tab title="Python" %}

```python
import hashlib
import hmac
from urllib.parse import urlparse

def generate_hmac(http_method, url, body, content_type, x_auth_client, secret_key):
    parsed_url = urlparse(url)
    request_path = parsed_url.path
    query_params = parsed_url.query

    data_to_hash = f"{http_method}\n{request_path}\n{query_params}\n{x_auth_client}\n{content_type}\n{body}"
    hmac_signature = hmac.new(secret_key.encode('utf-8'), data_to_hash.encode('utf-8'), hashlib.sha256).hexdigest()
    return hmac_signature

http_method = "POST"
url = "https://start.faceverify.ai/api/v1/session"
body = '{"country": "US", "uniqueIdentifier": "user123"}'
content_type = "application/json"
x_auth_client = "xxx-xxx-xxx-xxx-xxx"  # Your API key
secret_key = "xxx-xxx-xxx-xxx-xxx"  # Your secret key

hmac_signature = generate_hmac(http_method, url, body, content_type, x_auth_client, secret_key)
print(hmac_signature)
```

{% endtab %}

{% tab title="PHP" %}

```php
<?php
function generateHmac($httpMethod, $url, $body, $contentType, $xAuthClient, $secretKey) {
    $parsedUrl = parse_url($url);
    $requestPath = $parsedUrl['path'];
    $queryParams = isset($parsedUrl['query']) ? $parsedUrl['query'] : '';

    $dataToHash = $httpMethod . "\n" . $requestPath . "\n" . $queryParams . "\n" . $xAuthClient . "\n" . $contentType . "\n" . $body;

    $hmacSignature = hash_hmac('sha256', $dataToHash, $secretKey);
    return $hmacSignature;
}

$httpMethod = "POST";
$url = "https://start.faceverify.ai/api/v1/session";
$body = json_encode(array(
    'country' => 'US',
    'uniqueIdentifier' => 'user123'
));
$contentType = "application/json";
// $xAuthClient is your API key
$xAuthClient = "xxx-xxx-xxx-xxx-xxx";
$secretKey = "xxx-xxx-xxx-xxx-xxx"; // Your secret key

$hmacSignature = generateHmac($httpMethod, $url, $body, $contentType, $xAuthClient, $secretKey);
echo $hmacSignature;
?>
```

{% endtab %}
{% endtabs %}

{% openapi src="<https://1053046052-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FDvMwHcGuRndvUobPaqDt%2Fuploads%2FcaiwM2qtdhD560WMnXGM%2Ffaceverify1.yaml?alt=media&token=bd6c0944-c88e-4f66-b241-63776f753d32>" path="/session" method="post" %}
[faceverify1.yaml](https://1053046052-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FDvMwHcGuRndvUobPaqDt%2Fuploads%2FcaiwM2qtdhD560WMnXGM%2Ffaceverify1.yaml?alt=media\&token=bd6c0944-c88e-4f66-b241-63776f753d32)
{% endopenapi %}