WAservix WordPress integration

Connect WAservix to your WordPress app: send WhatsApp messages from your own WhatsApp number, check delivery and receive replies by webhook. Copy the examples, add your key and run.

Requirements

WordPress 5.6+. Put the code in a small plugin (or your theme’s functions.php); it uses the built-in HTTP API.

Add your API key

Create a key under WAservix → Devices → API key (it starts with wpk_). Keep it on your server, in an environment variable or secret store. Never put it in a website, a mobile app or a public repository.

// wp-config.php (above "That's all, stop editing!")
define('WASERVIX_KEY', 'wpk_your_key');
define('WASERVIX_WEBHOOK_SECRET', 'your_webhook_secret');

Send a WhatsApp message

Messages are queued and sent one at a time per number, so the answer comes back at once with "status": "in_progress" and a msgId.

$res = wp_remote_request('https://tekservix.com/waservix/api/send-message', [
    'method'  => 'POST',
    'timeout' => 30,
    'headers' => ['Authorization' => 'Bearer ' . WASERVIX_KEY, 'Content-Type' => 'application/json'],
    'body'    => wp_json_encode([
        'to' => '+250788123456',
        'text' => 'Hello Aline, your order is ready',
    ]),
]);
if (is_wp_error($res)) { error_log($res->get_error_message()); return; }
$json = json_decode(wp_remote_retrieve_body($res), true);
if (wp_remote_retrieve_response_code($res) >= 400) { error_log($json['message'] ?? 'API error'); return; }

Send a document or image

Use imageUrl, videoUrl, audioUrl or documentUrl with a public https link. Groups work too: put the group JID (…@g.us) in to.

$res = wp_remote_request('https://tekservix.com/waservix/api/send-message', [
    'method'  => 'POST',
    'timeout' => 30,
    'headers' => ['Authorization' => 'Bearer ' . WASERVIX_KEY, 'Content-Type' => 'application/json'],
    'body'    => wp_json_encode([
        'to' => '+250788123456',
        'text' => 'Your invoice',
        'documentUrl' => 'https://example.com/inv-1042.pdf',
        'fileName' => 'Invoice-1042.pdf',
    ]),
]);
if (is_wp_error($res)) { error_log($res->get_error_message()); return; }
$json = json_decode(wp_remote_retrieve_body($res), true);
if (wp_remote_retrieve_response_code($res) >= 400) { error_log($json['message'] ?? 'API error'); return; }

Check message status

status is queued, sent, delivered, read, played or failed. Webhooks tell you without polling.

$res = wp_remote_request('https://tekservix.com/waservix/api/messages/58213/info', [
    'method'  => 'GET',
    'timeout' => 30,
    'headers' => ['Authorization' => 'Bearer ' . WASERVIX_KEY],
]);
if (is_wp_error($res)) { error_log($res->get_error_message()); return; }
$json = json_decode(wp_remote_retrieve_body($res), true);
if (wp_remote_retrieve_response_code($res) >= 400) { error_log($json['message'] ?? 'API error'); return; }

Receive WhatsApp messages by webhook

Set a webhook URL and events for the number under WAservix → Devices. Each request carries X-Webhook-Signature, which equals that device’s webhook secret. Compare it in constant time, answer 2xx quickly and process the message after answering (we retry 3 times).

add_action('rest_api_init', function () {
    register_rest_route('wapenda/v1', '/webhook', [
        'methods'             => 'POST',
        'permission_callback' => function (WP_REST_Request $req) {
            return hash_equals(WASERVIX_WEBHOOK_SECRET, (string) $req->get_header('X-Webhook-Signature'));
        },
        'callback' => function (WP_REST_Request $req) {
            $event = $req->get_json_params();
            if ($event['event'] === 'messages.received') {
                $m = $event['data']['messages'];
                error_log(($m['key']['cleanedSenderPn'] ?? '') . ': ' . ($m['messageBody'] ?? ''));
            }
            return new WP_REST_Response(null, 200);
        },
    ]);
});
// Webhook URL: https://yoursite.com/wp-json/wapenda/v1/webhook

Errors, limits and retries

Every answer has success; errors add a readable message. 401 means a wrong key, 402 no active plan for this number or phone, 409 the number or phone isn’t connected, 429 too many requests (300 a minute per key): wait for the Retry-After seconds and try again. Retry 5xx and network errors with a back-off, but don’t blindly retry a send that may have worked: check its status first, or you could send twice.

Full list of endpoints and fields: WAservix API reference.

Questions

Is this the official WhatsApp Business API?

No. WAservix links your own number as a companion device, like WhatsApp Web, so there is no Meta approval. Only message people who expect to hear from you: WhatsApp can ban numbers that spam.

Can I call the API from a mobile app or browser?

Don’t. Anyone could read the key from the app or page. Call the API from your server and let your app talk to your server.

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