PayKrypt Payment Gateway for WHMCS

Accept cryptocurrency payments in WHMCS through the PayKrypt hosted checkout. The module creates a PayKrypt payment intent for each WHMCS invoice, redirects the customer to PayKrypt checkout, and updates the WHMCS invoice once payment is confirmed.

Key features

Hosted PayKrypt checkout — customers pay on PayKrypt's secure page and return to WHMCS.
Signed webhook handling for fast, verified payment updates.
WHMCS cron-based polling fallback if a webhook is missed.
Duplicate-payment protection.
Amount, currency, and payment-intent validation before any invoice payment is applied.
Support for detected, partial, and confirmed PayKrypt payment events.
Self-contained module — no Composer dependencies required on the WHMCS server.

Installation

Upload the included modules/ and includes/ directories to the root of your WHMCS installation.
Go to Setup > Payment Gateways in WHMCS.
Activate PayKrypt Payment Gateway.
Enter your PayKrypt API credentials and configure the webhook URL below.

Webhook setup

payment.detected.v1
payment.partial.v1
payment.confirmed.v1

Set the webhook URL to:

https://your-whmcs-domain.com/modules/gateways/callback/paykrypt.php

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Version Compatibility

Compatible with WHMCS v8.13

Full Version Compatibility

All versions of WHMCS v8.13
All versions of WHMCS v8.12
All versions of WHMCS v8.11
Selected versions of WHMCS v8.10
8.10.0
Selected versions of WHMCS v8.9
8.9.0
Selected versions of WHMCS v8.8
8.8.0
All versions of WHMCS v8.7
All versions of WHMCS v8.6
All versions of WHMCS v8.5
All versions of WHMCS v8.4
All versions of WHMCS v8.3
All versions of WHMCS v8.2
All versions of WHMCS v8.1
All versions of WHMCS v8.0
All versions of WHMCS v7.10
All versions of WHMCS v7.9
All versions of WHMCS v7.8
All versions of WHMCS v7.7
All versions of WHMCS v7.6
All versions of WHMCS v7.5
All versions of WHMCS v7.4
Selected versions of WHMCS v7.3
7.3.0
All versions of WHMCS v7.2
All versions of WHMCS v7.1
All versions of WHMCS v7.0

Support for this product

The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.

Visit Website Contact Support

Developed By PayKrypt

Changelog

v0.2.0 Released July 14th, 2026

Latest Version

Added signed PayKrypt webhook support.
Added WHMCS cron-based fallback reconciliation.
Added support for payment.detected.v1, payment.partial.v1, and payment.confirmed.v1.
Added duplicate-payment protection before applying invoice payments.
Added validation for payment intent ID, amount, currency, and fully-paid status.
Added automatic reconciliation metadata for pending PayKrypt payment intents.
Added compatibility checks for WHMCS 7.x and 8.x compatible PHP syntax.
Fixed WHMCS hook loading behavior.