Before you start
You need a WHMCS installation and a BulkSMS account with credits.
The connection uses SMS Manager BulkSMS, a paid add-on from WHMCS Services. Buy it from the WHMCS Marketplace or WHMCS Services. Use the code BulkSMS for a discount.
Check the add-on's listing for the WHMCS and PHP versions it supports. It needs ionCube Loader, allow_url_fopen turned on, and WHMCS's international phone number input turned on.
Create a BulkSMS API token
Log in to your BulkSMS account and go to Settings > Developers.
Click Create API Token and give it a name, for example WHMCS. Copy the Token ID and Token Secret. The secret is only shown once.
The add-on accepts an API token or your BulkSMS username and password. We recommend the token.
Install and connect the add-on
Upload and activate the add-on in WHMCS, following WHMCS Services' installation instructions.
Open the add-on's settings and enter your BulkSMS token details and Sender ID.
Choose which events send an SMS and edit the message templates. For example: client registration and login, invoice created, paid or overdue, support ticket updates, and service or domain changes.
Send a test SMS to your own number.
More features
SMS two-factor authentication for clients and admins.
Mass SMS to clients, birthday messages, opt-out handling and safe sending times.
SMS alerts to admins, for example for new orders or tickets.
Troubleshooting
Messages aren't sent: check the BulkSMS details in the add-on, that clients' numbers include a country code, and that your account has credits.
You can see every message and its delivery status under Sent Messages in BulkSMS. For problems with the add-on itself, contact WHMCS Services.
All setup and ready to go!
If you have any questions about your BulkSMS account, please contact our support team. Include your account name and put WHMCS in the subject line, and we'll be happy to help.