We build custom WHMCS addon modules, payment gateways, provisioning integrations, and third-party API connections — without ever touching WHMCS core.
Every hosting business has unique workflows, payment providers, server panels, and automation requirements that WHMCS's default installation cannot fully cover. Custom modules and API integrations are how serious hosting providers extend their platform to match their exact business model — and that's exactly what we build.
Modules & integrations delivered
Payment gateways integrated
Years of WHMCS development
Modules interact with WHMCS through official APIs and hook points — your core installation stays untouched and upgrade-safe for every future WHMCS release.
Implement your precise pricing models, provisioning rules, fraud checks, or billing automation that no off-the-shelf module provides.
Automated provisioning, suspension, termination, billing sync, and status updates eliminate manual admin work and human error.
Connect WHMCS to CRM platforms, ERP systems, SMS/WhatsApp gateways, domain registrars, cloud providers, and custom internal tools.
Custom client-area widgets, self-service panels, and streamlined checkout flows reduce support tickets and increase satisfaction.
Every module is written using WHMCS best practices, namespaced PHP 8+, with full logging and error handling — ready to handle growth without rewrites.
Whatever your WHMCS system needs — we've built it. From payment hooks to full provisioning automation pipelines.
Custom WHMCS admin panel addons: management dashboards, reporting tools, bulk operations, multi-tenant panels, automated billing tools. Built with WHMCS Module Framework v2.
Full WHMCS payment gateway modules with redirect/callback/IPN support, webhook handling, refund API, 3DS/SCA compliance review, and subscription billing. Supports Stripe, Razorpay, SSLCommerz, Paddle, regional gateways.
Automate service creation, suspension, termination, and password resets via cPanel, Plesk, DirectAdmin, Virtualizor, Proxmox, or any custom server API. Fully WHMCS Module Framework compliant.
Custom domain registrar integrations (EPP Protocol, REST APIs) supporting registration, transfer, renewal, nameserver management, WHOIS privacy, and EPP code retrieval.
WHMCS Hook-based customizations — event-triggered automation, custom email logic, invoice modifications, order validation rules, and client area enhancements without a full module.
A structured, milestone-based approach — from requirements to tested deployment
1. Requirements Gathering
2. API / Platform Analysis
3. Module Architecture Design
4. Development Sprints (PHP 8+)
5. WHMCS Environment Testing
6. Staging Deployment & UAT
7. Production Deployment + Handover
Models, controllers, and service classes built on WHMCS's official module framework for full platform compatibility.
All 200+ WHMCS hook points used selectively to inject logic non-invasively without modifying core.
localAPI for server-side calls, WHMCS External API for headless integrations and third-party access.
Admin panel views using WHMCS's Smarty-based admin templates; companion Laravel apps using Blade.
Strict typing, enums, fibers, and modern OOP patterns across every module for maintainability.
Companion applications and management layers handling webhooks, reporting, and admin dashboards.
API client libraries for all major protocol types, with retry logic, rate-limit handling, and security headers.
Optimised custom tables, migrations, and query builders for module-specific data storage.
Full WHMCS staging instances for safe module testing before any production deployment.
Unit and feature tests for all critical module logic — gateway callbacks, provisioning states, hook responses.
API interaction testing and documentation for every integration endpoint.
Version-controlled, peer-reviewed code with automated test pipelines before every deployment.
Every integration is scoped individually. These tiers give you a starting reference.
💡 All prices are starting estimates. Final quote depends on project scope.
We've been working with Host Modules for 3+ years. Even with requirements that were somewhat out of the ordinary, they always delivered. Having developers we can rely on is essential with 30,000+ accounts.
CTO, webhosting.uk.com
The team understood exactly what needed to be done, went above and beyond on the payment gateway module, and handled the job tremendously. Exceptional experience.
Lead Dev, coma-dev
Custom WHMCS code does exactly the job. Pricing is reasonable, and their focus on customer service keeps us coming back for every new integration project.
Director, Enterprise Hosting
I've worked with Host Modules for years on complex WHMCS integrations. Their expertise is exceptional — they always get the job done with strong communication.
Founder, Hosting Provider
The best and fastest team for WHMCS modules. Incredibly attentive, fast support, and highly professional response to any integration issues. Highly recommend.
CTO, EU Cloud Services
We needed an emergency payment gateway upgrade in under 48 hours. Host Modules delivered. That kind of responsive expertise is invaluable.
CEO, reseller.io
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