FOSSBilling Module – Domain Integration & Installation Guide
FOSSBilling is an open-source, free, and modern hosting & domain billing software. Similar in structure to WHMCS, FOSSBilling stands out with its high customizability, API-friendly architecture, and community-driven development.
FOSSBilling allows you to manage domain sales, hosting services, customer management, automated billing, and service integrations from a single control panel.
Built on this infrastructure, the FOSSBilling Domain Name API Module integrates domain operations with the DomainNameApi system, providing professional and fully automated domain management.
What Is FOSSBilling and What Does It Do?
FOSSBilling enables hosting and domain-focused businesses to centrally manage the following operations:
- Domain sales and management
- Hosting packages and service management
- Automated billing and payment tracking
- Customer and reseller management
- API and module integrations
Thanks to its open-source structure, it offers flexibility for developers and a cost-free solution for businesses.
Figure 1: FOSSBilling Client Area

What Can Be Done with the FOSSBilling Domain Name API Module?
With this module, the following domain operations can be managed from a single panel:
- Domain registration
- Domain transfer
- Domain renewal
- Nameserver (DNS) management
- Whois / contact information updates
- Domain lock enable / disable (Registrar Lock)
- Whois privacy protection
- Full support for .TR domain extensions
All operations are executed in real time via the Domain Name API.
Figure 2: FOSSBilling Admin Panel
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FOSSBilling Domain Name API Module Requirements
To ensure smooth operation, the following requirements must be met:
- FOSSBilling: Version 1.0 or higher
- PHP: Version 8.0 or higher
- PHP SOAP extension: Must be enabled
- Domain Name API access: Active API username and password
These requirements ensure full compatibility with the Domain Name API infrastructure.
FOSSBilling Module Installation
Installation can be completed in a few simple steps:
- Upload the module folder to the following directory:
library/Registrar/Adapter/ - Log in to the FOSSBilling admin panel.
- Navigate to Settings > Domain Registrar Modules.
- Enable the DomainNameApi module.
- Enter your DomainNameApi API username and password.
- Save the settings and start using the module.
After installation, all domain operations are automatically handled via Domain Name API.
Module Update Process
When updating the FOSSBilling DomainNameApi Module:
- Download the new version
- Overwrite the existing files
- All settings are preserved
Only the code is updated; configurations remain unchanged.
FOSSBilling Module Features
Domain Operations
- Domain registration, transfer, and renewal
- Full support for .TR domain extensions
DNS & Whois Management
- Nameserver (DNS) management
- Whois / contact information updates
- Whois privacy protection
Security & Control
- Domain lock (Registrar Lock)
- Detailed error and operation logs
User Experience
- Turkish and multi-language support
- Full compatibility with FOSSBilling
Advantages of FOSSBilling – Domain Name API Integration
- Domain operations are fully automated
- Domain and billing management from a single panel
- Reduced manual processing and error rates
- Scalable infrastructure for domain resellers
- Wide support for Turkish and global TLDs
This integration significantly improves operational efficiency, especially for businesses selling domains.
Who Is It Suitable For?
- Hosting companies using FOSSBilling
- Domain resellers
- Digital marketing agencies
- Web design agencies
- Domain-focused SaaS projects
- Businesses working with .TR and global domain extensions
FOSSBilling Common Error Codes
| Code | Description | Detail |
|---|---|---|
| 1000 | Command completed successfully | The operation was completed without any errors. |
| 1001 | Command completed successfully; action pending | The command was successful, but the operation has been queued for processing. |
| 2003 | Required parameter missing | For example: Phone number is missing in the contact information. |
| 2105 | Domain is not eligible for renewal | The domain is locked for updates; status should not be "clientUpdateProhibited". |
| 2200 | Authentication error | API username/password is incorrect, or the domain belongs to another registrar. |
| 2302 | Object exists | The domain or nameserver is already registered in the system. |
| 2303 | Object does not exist | The domain or nameserver could not be found; a new registration is required. |
| 2304 | Domain status does not allow the operation | The domain is locked for updates; status should not be "clientUpdateProhibited". |
The FOSSBilling Domain Name API Module is a powerful integration that elevates domain management to a professional level within the FOSSBilling ecosystem. With easy installation, advanced domain features, and broad extension support including .TR domains, it is an ideal solution for businesses seeking centralized domain management.
To accelerate your domain sales and management processes, FOSSBilling - Domain Name API integration offers a reliable and sustainable solution.
