Creating a Registrar Integration

Registrar adapters let FOSSBilling communicate with domain registrars to register, transfer, and manage domains on behalf of your customers.

File Structure

Place your adapter in:

src/library/Registrar/Adapter/
└── YourRegistrar.php

Your class must extend Registrar_AdapterAbstract and implement its required methods.

Required Methods

Check the Registrar_AdapterAbstract class for the full list of methods to implement. Common ones include:

Method	Purpose
`isAvailable()`	Check domain availability
`register()`	Register a new domain
`transfer()`	Transfer a domain
`renew()`	Renew a domain
`getInfo()`	Get domain details
`modifyNs()`	Update nameservers
`modifyContact()`	Update contact information

Basic Structure

<?php

class Registrar_Adapter_YourRegistrar extends Registrar_AdapterAbstract
{
    public function __construct($options)
    {
        parent::__construct($options);

        if (!isset($this->config['api_key'])) {
            throw new Registrar_Exception('API key is required');
        }
    }

    public static function getConfig(): array
    {
        return [
            'label' => 'YourRegistrar',
            'form' => [
                'api_key' => ['text', ['label' => 'API Key']],
                'api_secret' => ['password', ['label' => 'API Secret']],
            ],
        ];
    }

    public function isAvailable($domain): bool
    {
        $response = $this->apiRequest('check', ['domain' => $domain]);
        return $response['available'] ?? false;
    }

    public function register($domain, array $contact): bool
    {
        $params = [
            'domain' => $domain,
            'period' => $this->getPeriod(),
            'contacts' => $this->normalizeContact($contact),
        ];

        $response = $this->apiRequest('register', $params);
        return $response['success'] ?? false;
    }

    private function apiRequest($action, array $params = []): array
    {
        $ch = curl_init($this->config['api_url'] . '/' . $action);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($params));
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Authorization: Bearer ' . $this->config['api_key'],
            'Content-Type: application/json',
        ]);

        $response = curl_exec($ch);
        curl_close($ch);

        return json_decode($response, true);
    }
}

Testing Your Adapter

Create a test domain product in FOSSBilling
Configure your registrar adapter in System → Domain registration
Test domain availability checks
Test registration (if possible with registrar's test environment)
Verify contact information syncing

Resources

Registrar_AdapterAbstract — Base class with inline docs
Existing adapters in src/library/Registrar/Adapter/
Example: Netim adapter

Getting Help

Join our Discord if you need assistance with your registrar integration.