Installation & configuration

Install with Composer

From your application directory, install the package:
Terminal window
```
composer require rayo-sms/rayo-sms-php-sdk
```
Load Composer’s autoloader:
```
require_once 'vendor/autoload.php';
```
Create an API key in the web application under Actions → Settings and expose it to your process as SMS_API_KEY.

Create a client

The API base URL for this documentation build is https://sms-api.rayo.gr/v1.

$client = new Client(
    getenv('SMS_API_KEY'),
    'https://sms-api.rayo.gr/v1'
);

The constructor accepts either a base URL string or an options array. A URL with or without the trailing /v1/ is normalized to the same endpoint.

use Rayo\SmsSdk\Client;

$client = new Client(getenv('SMS_API_KEY'), [
    'base_url'       => 'https://your-api-host.example/v1',
    'timeout'        => 15.0,
    'connect_timeout'=> 5.0,
]);

Supported transport options include:

Option	Purpose
`base_url`	Required API origin or versioned base URL
`timeout`	Total Guzzle request timeout; defaults to `10.0` seconds
`connect_timeout`	Connection timeout forwarded to Guzzle
`headers`	Additional request headers
`verify`	Guzzle TLS certificate verification setting
`handler`	Custom Guzzle handler, useful in tests
`http_client`	An existing PSR-18-compatible Guzzle `ClientInterface` implementation

The client automatically supplies Authorization: Bearer …, Accept: application/json, and the JSON content type when required.

For the complete HTTP API, see the API reference.