PHP

composer require sendkit/sendkit-php

use SendKit\SendKit;

$client = SendKit::client('sk_your_api_key');

$response = $client->emails()->send([
    'from' => 'Your Name <you@yourdomain.com>',
    'to' => 'recipient@example.com',
    'subject' => 'Hello from SendKit',
    'html' => '<h1>Welcome!</h1><p>Your first email with SendKit.</p>',
]);

echo $response['id'];

use SendKit\SendKit;

$client = SendKit::client('sk_your_api_key');

$result = $client->validateEmail('recipient@example.com');

if ($result['should_block']) {
    // Email should not be used
    echo $result['block_reason'];
}

echo $result['is_valid'];           // "HIGH" or "LOW"
echo $result['evaluations'];        // detailed checks

$contact = $client->contacts()->create([
    'email' => 'john@example.com',
    'first_name' => 'John',
    'last_name' => 'Doe',
    'list_ids' => ['list-uuid-1', 'list-uuid-2'],
    'properties' => ['COMPANY' => 'Acme'],
]);

echo $contact['id'];

$contacts = $client->contacts()->list();

// With pagination
$contacts = $client->contacts()->list(['page' => 2]);

echo $contacts['meta']['total'];    // total contacts

$contact = $client->contacts()->get('contact-uuid');

echo $contact['email'];
echo $contact['properties']['COMPANY'];

$contact = $client->contacts()->update('contact-uuid', [
    'first_name' => 'Johnny',
    'unsubscribed' => true,
]);

$client->contacts()->delete('contact-uuid');

$contact = $client->contacts()->addToLists('contact-uuid', [
    'list-uuid-1',
    'list-uuid-2',
]);

$lists = $client->contacts()->listLists('contact-uuid');

// With pagination
$lists = $client->contacts()->listLists('contact-uuid', ['page' => 2]);

$client->contacts()->removeFromList('contact-uuid', 'list-uuid');

$property = $client->contactProperties()->create([
    'key' => 'company',
    'type' => 'string',           // "string", "number", or "date"
    'fallback_value' => 'N/A',    // optional
]);

echo $property['id'];

$properties = $client->contactProperties()->list();

// With pagination
$properties = $client->contactProperties()->list(['page' => 2]);

$property = $client->contactProperties()->update('property-uuid', [
    'key' => 'organization',
    'fallback_value' => 'Unknown',
]);

$client->contactProperties()->delete('property-uuid');