# Headers (PHP SDK)

Retrieve the headers your application is sending for troubleshooting authentication issues.

## Making Requests

Use the `headers()` method on the `utilities` resource to see request headers:

<a name="headers"></a>
## headers

```php
public function headers(): Headers
```

Retrieve the headers sent by your application. This endpoint aids in troubleshooting authentication issues, particularly with the Authorization header.

### Notes

- Sensitive header values (like Authorization) are partially redacted for security.
- This is useful for debugging API authentication problems.

### Returns

- `Headers`

  A Headers response object containing the headers sent in the request.

### Example (View Headers)

```php
<?php

use MarketDataApp\Client;

$client = new Client();

// Get the headers being sent
$headers = $client->utilities->headers();

echo "Request Headers:\n";
echo "================\n";

foreach ($headers->headers as $name => $value) {
    echo "$name: $value\n";
}
```

**Output**

```
Request Headers:
================
Authorization: Bearer eyJ0...***REDACTED***
Content-Type: application/json
User-Agent: MarketDataApp-PHP/1.0.0
Host: api.marketdata.app
```

### Example (Verify Auth)

```php
<?php

use MarketDataApp\Client;

$client = new Client();

// Debug authentication setup
$headers = $client->utilities->headers();

// Check if Authorization header is present
if (isset($headers->headers['Authorization'])) {
    echo "✓ Authorization header is being sent.\n";
    echo "Header value: " . $headers->headers['Authorization'] . "\n";
} else {
    echo "✗ Authorization header is missing!\n";
    echo "Check your MARKETDATA_TOKEN environment variable.\n";
}
```

<a name="Headers"></a>
## Headers

```php
class Headers extends ResponseBase
{
    public string $status;
    public array $headers;
}
```

Represents the request headers sent to the API.

### Properties

- `status` (string): Response status (`"ok"`).
- `headers` (array): Associative array of header name => value pairs.