Accurate Address Validation for 18 European Countries
Validate and autocomplete addresses in real-time. Postcode lookup for 18 European countries, including the Netherlands, Belgium, Luxembourg, France, Germany and the United Kingdom. Reduce returns, improve delivery reliability and enhance user experience.
Key Features
Everything you need to validate data with confidence
Postcode Lookup
Enter a postcode and house number to get complete address details instantly. Supports 18 European countries including NL, BE, LU, FR and DE.
Address Autocomplete
Type-ahead search for addresses as users type. Reduce form abandonment and improve conversion rates.
Bulk Validation
Validate up to 10,000 addresses per batch. Perfect for database cleaning and data migration projects.
Official Data Sources
NL, BE, LU and FR use weekly-updated official government data. The remaining 14 countries use high-quality data providers with monthly updates.
International Format
Returns addresses in standardized format. Easy to integrate into any system.
Real-time Validation
Average response time under 80ms. Fast enough for real-time form validation.
Use Cases
See how businesses use this API
E-commerce Checkout
Prevent failed deliveries by validating addresses at checkout. Reduce returns and improve customer satisfaction.
User Registration
Ensure accurate user data from the start. Validate addresses during registration to maintain clean databases.
CRM Data Enrichment
Automatically complete missing address details. Standardize formats and correct typos in existing data.
Logistics & Delivery
Validate delivery addresses before shipping. Reduce failed delivery attempts and associated costs.
Simple Integration
Validate addresses with just a few lines of code
$client = new \ApiCheck\Client('your-api-key');
$result = $client->validateAddress([
'postcode' => '1234AB',
'huisnummer' => '42',
'country' => 'lookup-nl'
]);
if ($result->isValid()) {
echo $result->getStreet() . ' ' . $result->getCity();
}Why Choose ApiCheck?
Built for developers, trusted by businesses
18 countries supported, including NL, BE, LU & FR with official government data
Average response time under 80ms for real-time validation
GDPR-compliant with all data processing within the EU
99.99% uptime SLA for reliable operations
Frequently Asked Questions
Find answers to common questions
Which countries are supported?
The Address Validation API supports 18 European countries: the Netherlands, Belgium, Luxembourg, France, Germany, Czech Republic, Finland, Italy, Norway, Poland, Portugal, Romania, Spain, Switzerland, Austria, Denmark, the United Kingdom and Sweden. For NL, BE, LU and FR we use official government data updated weekly. All other countries use high-quality data providers with monthly updates.
What is the difference between lookup and autocomplete?
Lookup validation uses postcode + house number to retrieve complete address details. Autocomplete enables type-ahead search for partial addresses, streets, or locations.
Can I validate addresses in bulk?
Yes! You can validate up to 10,000 addresses per batch request. This is perfect for database cleaning, data migration projects, or regular data maintenance.
How often is the address data updated?
We receive updates from official government sources on a regular basis. This ensures that you always have access to the most current and accurate address information.
Is the API GDPR-compliant?
Yes, absolutely. All address validation is performed within the European Union, and we do not store any address data submitted for validation. We are fully GDPR-compliant.
Ready to get started?
Create a free account today and validate your first data immediately