WHMCS USDT Payment Gateway
WHMCS merchants могут добавить stablecoin payments без разработки собственного gateway. PolyPay дает платежный слой и plugin-oriented integration flow.
Why WHMCS merchants ask for USDT
Hosting, SaaS, and digital-service customers often want payment methods that work across borders and settle quickly. USDT is familiar to many crypto-paying users.
Adding USDT to WHMCS can reduce manual invoices and give customers a direct checkout option for renewal or service activation.
Integration flow
The gateway creates a PolyPay order for the WHMCS invoice, redirects the customer to the crypto checkout, and waits for webhook confirmation before updating invoice state.
The backend callback should be treated as the source of truth. Frontend redirects are useful for user experience but should not be the only payment confirmation.
- Enable the PolyPay gateway module
- Configure API credentials and callback URL
- Map paid, pending, expired, and failed states
- Test with low-value invoices before production rollout
Launch checklist
Before production launch, make sure the WHMCS callback endpoint is reachable over HTTPS and that invoice status changes are idempotent.
- Back up WHMCS before plugin upgrades
- Keep plugin version and changelog visible
- Verify webhook signature and timestamp
- Train support staff on wrong-chain and underpaid cases
Next steps
If you are ready to integrate, continue with the PolyPay x402 integration guide or the JavaScript SDK documentation.