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Welcome to the WHMCS Documentation. This is your one stop resource for everything WHMCS - covering everything from initial setup, to advanced customisation and API integration.

To begin your search, what topic can we help you with today?

<a href="Installing_WHMCS">Installing WHMCS</a>

<a href="Upgrading">Upgrading</a>

<a href="System_Requirements">System Requirements</a>

<a href="Importing_Data">Importing Data</a>

Payment Gateways

Server/Provisioning Modules

Domain Registrars

Fraud Protection

Customising WHMCS

Working with Templates

Action Hooks

API

Setup & Configuration

Automation Settings

Common Troubleshooting Tips

How To Guides

Reports

Report a Bug

Glossary

Forums

Looking for information on Version 6.0? Click here to visit the dedicated Version 6.0 documentation portal