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Address, email, phone & license plate validation API

The fastest and most accurate validation APIs for 41 countries. Reduce returns, improve conversion and prevent errors - live in minutes.

Create free account Documentation
  • 200 free credits
  • GDPR-ready
  • 41 countries supported
  • 99.99% uptime
Validation Mode
api.apicheck.nl/v1/address/validate
Response
// Enter data to validate...

Four APIs. One platform.

Integrate address, email and phone validation via a single REST API. Flexible, fast and documented.

Calculate the price per validation for your plan:

Address Validation API

Validate and autocomplete addresses in real-time. Postcode lookup for 41 countries. Reduce returns and improve delivery reliability.

  • Postcode lookup
  • 41 countries
  • Autocomplete
From €0.0030 per validation
Learn more

Email Validation API

Check syntax, domain and deliverability. Detect disposable addresses and non-existent mailboxes before they pollute your list.

  • Syntax check
  • MX verification
  • Disposable detection
From €0.0060 per validation
Learn more

Phone Validation API

Validate and normalize phone numbers internationally. Detect line type, operators and format to E.164 standard.

  • International
  • Line type
  • E.164 format
From €0.0015 per validation
Learn more

License Plate Validation API

Validate Dutch license plates and retrieve vehicle information. Brand, model, color and first admission date available instantly.

  • RDW data
  • Vehicle details
  • Updated daily
  • All formats
From €0.0150 per validation
Learn more

Live in 15 minutes.

Detailed documentation, ready-to-use SDKs and plugins for the most popular platforms. Integrate into your stack with minimal effort.

validate_address.php
// ApiCheck - Adres Validatie
// composer require api-check/php-client

use ApiCheck\ApiClient;

$client = new ApiClient();
$client->setApiKey('uw-api-key');

$result = $client->lookup('1234AB', '10');

echo $result['street'];  // "Dreef"
echo $result['city'];    // "Haarlem"
  • REST API
  • PHP & Laravel SDK
  • < 80ms response
  • GDPR-ready

From registration to live validation.

Get operational in four steps - in less than 15 minutes.

  1. Create account

    Register for free. No credit card, no obligations. Ready in 60 seconds.

  2. Generate API key

    Your unique key is ready immediately in the dashboard. Secure and personal.

  3. Integrate & test

    Plugin, SDK or direct REST connection. Documentation and integration help included.

  4. Monitor & scale

    Real-time statistics in the dashboard. Easily upgrade as your usage grows.

Transparent. Fair. Scalable.

Pay only for what you use. No hidden costs, monthly cancellable.

  • Free

    Try it out, 200 credits - one-time
    • 200 one-time credits
    • No credit card required
    • Free plugins
    • Integration help
    €0 /mo
    Get started free

  • Mini

    250 credits / month
    • 250 credits/month
    • Standard support
    • Free plugins
    • Integration help
    €1.95 /mo
    Choose Mini

  • Small

    1,000 credits / month
    • 1,000 credits/month
    • Standard support
    • Free plugins
    • Integration help
    €4.95 /mo
    Choose Small

  • Medium

    Most Popular, 5,000 credits / month
    • 5,000 credits/month
    • Priority support
    • Free plugins
    • Personal help
    €14.95 /mo
    Choose Medium

  • Large

    10,000 credits / month
    • 10,000 credits/month
    • Priority support
    • Free plugins
    • Dedicated help
    €24.95 /mo
    Choose Large
  • Extra usage: €0.01 per credit
  • Or buy extra credits from
  • All prices excl. 21% VAT
  • Monthly cancellable

Connect to your existing stack

Want to learn more? View the full overview of all integrations including installation documentation and live demos.

View all integrations & demos

Works with any language via REST API. Read the documentation

Built on trust.

European infrastructure, GDPR principles and transparency as foundation.

Uptime SLA
99.99%
Avg. response time
<80ms
Validations per month
500K+
Countries supported
18+
Validation APIs
4

  • Made in the EU

    ApiCheck is fully developed, managed and hosted within the European Union, with EU-hosted infrastructure and Dutch registers. Your data is never processed outside the EU - built around GDPR principles and the strictest European privacy standards.

  • GDPR-ready

    Your customer data is exclusively processed within the EU. No data storage, no profiles, no advertising purposes.

  • 99.99% Uptime SLA

    Guaranteed availability with SLA. Real-time status monitoring and proactive failure notifications.

  • Official data sources

    Address data from official government registers in 11 European countries, including the Netherlands and Belgium. Always current, always reliable.

What customers say.

Very happy with this service! Very nice that the system also checks Belgian addresses. So far very satisfied!

Daphne van der VeenDaphne draaft door

Works excellently and is definitely not expensive. A great development that we will never step away from.

Floris-JanLaderkoopjes.nl

Thanks to address validation, we know for sure that every address is entered correctly. Easy to install. Very satisfied!

WebgradeWebgrade.nl

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Validate your first data immediately. No obligations.

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