2. Requirements

The following are confirmed from the module source and its manifest (`whmcs.json`):

• WHMCS: version 8.0 or later.
• PHP: version 8.1 or later.
• PHP extensions: curl (all Linode API calls and the license check), json, and openssl for outbound HTTPS.
• Linode account: an active Linode (Akamai Cloud) account with billing configured.
• Linode API token: a Personal Access Token with Read/Write scope for Linodes, Images, Volumes, NodeBalancers, IPs, Account (events) and Profile (SSH keys). See Section 15.1.
• WHMPress license: a valid license key entered in modules/servers/linode/license.php, validated against the WHMPress licensing server.
• Outbound network access: HTTPS to api.linode.com (the Linode API) and to whmcs.whmpress.com (license validation and module auto-update).
• Writable directories: none required. The module stores all of its data in the WHMCS database.

Note: The Graphs page renders its charts with Chart.js, loaded from the jsDelivr CDN. If your customers browse from a network that blocks public CDNs, the page shows an explanatory notice instead of empty chart areas; every other page works without any external asset.