Official VELTIS Pay integration for WHMCS

Accept and manage PIX payments directly inside WHMCS with a production-oriented payment gateway designed for automation, security and financial reconciliation.

VELTIS Pay for WHMCS connects WHMCS invoices to the VELTIS Pay financial infrastructure, providing a complete PIX payment experience for customers and a reliable server-to-server confirmation flow for merchants.

Main features

• PIX payments directly from WHMCS invoices
• QR Code and PIX Copy and Paste
• Responsive embedded checkout
• Optional hosted VELTIS checkout
• Automatic invoice payment confirmation
• HMAC-SHA256 signed webhooks
• Idempotent charge creation
• Webhook Event ID deduplication
• Server-to-server charge verification
• Financial reconciliation before invoice settlement
• CPF and payer validation
• Automatic CPF formatting
• Sensitive data masking in logs
• Operational monitoring through the VELTIS Pay Monitor addon
• Responsive support for desktop and mobile WHMCS templates

Secure payment confirmation flow

1. The customer selects VELTIS Pay on a WHMCS invoice.
2. The module creates a PIX charge using the VELTIS server-to-server API.
3. WHMCS displays the PIX QR Code and Copy and Paste code.
4. The customer completes the PIX payment.
5. VELTIS sends a signed charge.paid webhook.
6. The module validates the HMAC signature and checks for duplicate events.
7. The charge is verified again through the VELTIS API.
8. Only after authoritative confirmation is the WHMCS invoice marked as paid.

Built for production

The integration includes financial idempotency, persistent webhook processing, event deduplication and server-to-server verification to reduce duplicated operations and improve payment reliability.

Included components

• VELTIS Pay WHMCS payment gateway
• webhook callback handler
• internal VELTIS API client
• event persistence and deduplication
• VELTIS Pay Monitor addon
• Apps & Integrations metadata
• official VELTIS branding
• installation and troubleshooting documentation

Requirements

• WHMCS
• PHP compatible with the selected WHMCS version
• PHP cURL
• JSON
• PDO / PDO MySQL
• OpenSSL / TLS support
• HTTPS
• VELTIS Pay account
• VELTIS API Key
• VELTIS API Secret
• VELTIS Webhook Signing Secret
• BRL currency for PIX transactions

Support

This integration is developed and maintained by VELTIS Pay.

VELTIS Pay — financial infrastructure for production.