Account configuration

1. Log in to your account at payrexx.com or zahls.ch
2. Navigate to Integrations > API & Plugins
3. Click on Add API Key
4. Give it a name, for example WHMCS, and click Add
5. The key is now created. Click Copy to copy the key and keep it for later, as it is needed for configuring WHMCS.
6. Open the Webhooks page
7. Click on Create Webhook
8. Fill it out like so: