example.php

<?php

// If running this outside of this context, use the following include and
// comment out the two includes below
// require __DIR__ . '/vendor/autoload.php';
include(dirname(__DIR__) . '/lib/Client.php');
include(dirname(__DIR__) . '/lib/Response.php');
// This gets the parent directory, for your current directory use getcwd()
$path_to_config = dirname(__DIR__);
$apiKey = getenv('SENDGRID_API_KEY');
$headers = ['Authorization: Bearer ' . $apiKey];
$client = new SendGrid\Client('https://api.sendgrid.com', $headers, '/v3');

// GET /v3/api_keys - retrieve all API Keys that belong to the user
$queryParams = ['limit' => 100, 'offset' => 0];
$requestHeaders = ['X-Mock: 200'];
$response = $client->api_keys()->get(null, $queryParams, $requestHeaders);
echo $response->statusCode();
echo $response->body();
echo $response->headers();

// GET /v3/api_keys - retrieve all API Keys that belong to the user
$queryParams = ['limit' => 100, 'offset' => 0];
$requestHeaders = ['X-Mock: 200'];
$retryOnLimit = true; // with auto retry on rate limit
$response = $client->api_keys()->get(null, $queryParams, $requestHeaders, $retryOnLimit);

// POST /v3/api_keys - create a new user API Key
$requestBody = [
    'name' => 'My PHP API Key',
    'scopes' => [
        'mail.send',
        'alerts.create',
        'alerts.read'
    ]
];
$response = $client->api_keys()->post($requestBody);
$responseBody = json_decode($response->body(), true);
$apiKeyId = $responseBody['api_key_id'];

// GET /v3/api_keys/{api_key_id} - retrieve a single API Key
$response = $client->api_keys()->_($apiKeyId)->get();

// PATCH /v3/api_keys/{api_key_id} - update the name of an existing API Key
$requestBody = [
    'name' => 'A New Hope'
];
$response = $client->api_keys()->_($apiKeyId)->patch($requestBody);

// PUT /v3/api_keys/{api_key_id} - update the name and scopes of a given API Key
$requestBody = [
    'name' => 'A New Hope',
    'scopes' => [
        'user.profile.read',
        'user.profile.update'
    ]
];
$response = $client->api_keys()->_($apiKeyId)->put($requestBody);

// DELETE /v3/api_keys/{api_key_id} - revoke an existing API Key
$response = $client->api_keys()->_($apiKeyId)->delete();