- Create a custom WHMCS client area theme
A theme in WHMCS controls the client facing user interface. Create a seamless experience for your visitors by creating a custom client area theme that matches the rest of your website. - Create a Provisioning Module
Provisioning Modules enable provisioning and management of services in WHMCS. They are also sometimes referred to as Product or Server Modules. - Create an Addon Module
Addon Modules allow you to create both admin pages and hooks to extend WHMCS further. - Create a Domain Registar Module
Registrar Modules allow for the registration and management of domains within WHMCS. Registrar Modules are also referred to as Domain Modules. - Create a Payment Gateway Module
Creating a Payment Gateway Module allows you to connect and integrate WHMCS with additional payment service providers. - Create a Mail Provider Module
Mail Provider Modules allow you to add custom mail providers to WHMCS. - Integrate WHMCS with 3rd party systems using the API
The WHMCS API allows you to perform operations and actions within WHMCS from external third party and custom code. - Browse the API Reference
A complete listing of API functions available in WHMCS. - Integrate 3rd party systems into WHMCS using Hooks
Hooks allow you to execute your own code when events occur inside WHMCS. - Browse the Hook Reference
A complete listing of Hook Points available in WHMCS. - Interact and retrieve data from the WHMCS Database
Learn how to interact with the WHMCS database. - Create a new language
Create your own additional language translations. - Upgrade to WHMCS 8.0
View important information about updating your code for WHMCS 8.0.
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