Best WordPress Phone Validation API & Email Verification Integration 2025

// Example WordPress filter for custom validation rules
add_filter('lookup_validation_rules', function($rules) {
    $rules['phone']['required'] = true;
    $rules['phone']['block_voip'] = false;
    $rules['phone']['min_risk_score'] = 70;
    
    $rules['email']['required'] = true;
    $rules['email']['block_disposable'] = true;
    $rules['email']['block_role_based'] = false;
    
    return $rules;
});

// Custom error messages
add_filter('lookup_error_messages', function($messages) {
    $messages['phone_invalid'] = 'Please enter a valid phone number.';
    $messages['email_disposable'] = 'Please use a permanent email address.';
    return $messages;
});