diff --git a/README.md b/README.md
index 76fe849..896d611 100644
--- a/README.md
+++ b/README.md
@@ -14,8 +14,6 @@ Log Laravel requests and responses for statistical purposes and optionally aggre
 
 ## Description
 
-
-
 This package lets you:
 
 - Check if a VAT number has a correct format
diff --git a/config/vat.php b/config/vat.php
index 5f8730b..a5fb818 100644
--- a/config/vat.php
+++ b/config/vat.php
@@ -11,4 +11,27 @@
     |
     */
     'default' => 'stack',
+
+    /*
+    |--------------------------------------------------------------------------
+    | Drivers
+    |--------------------------------------------------------------------------
+    |
+    | Drivers are the various services that can be used to validate VAT numbers.
+    | Usually a driver only supports a subset of countries.
+    | A list of institutions that provide VAT number information can be found
+    | from the list here: https://dinero.dk/tips/tjek-udenlandsk-cvr/
+    |
+     */
+    'drivers' => [
+        'stack' => [
+            'drivers' => ['cvr_api', 'abstract_api'],
+        ],
+        'cvr_api' => [
+            'access_token' => env('VAT_CVR_API_ACCESS_TOKEN'),
+        ],
+        'abstract_api' => [
+            'api_key' => env('VAT_ABSTRACT_API_KEY'),
+        ],
+    ],
 ];
diff --git a/src/Drivers/CvrApi.php b/src/Drivers/CvrApi.php
new file mode 100644
index 0000000..4a735af
--- /dev/null
+++ b/src/Drivers/CvrApi.php
@@ -0,0 +1,139 @@
+<?php
+
+namespace Bilfeldt\VatService\Drivers;
+
+use Bilfeldt\VatService\Exceptions\DriverUnavailable;
+use Bilfeldt\VatService\Exceptions\InvalidVatException;
+use Bilfeldt\VatService\Exceptions\UnsupportedCountryException;
+use Bilfeldt\VatService\Exceptions\VatNotFoundException;
+use Bilfeldt\VatService\VatInformation;
+use Bilfeldt\VatService\VatServiceInterface;
+use Illuminate\Http\Client\Response;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\Http;
+
+class CvrApi implements VatServiceInterface
+{
+    private static array $formats = [
+        'DK' => [
+            '########'
+        ],
+        'NO' => [
+            // empty means any format is accepted
+        ],
+    ];
+
+    public static function supports(string $countryCode): bool
+    {
+        return array_key_exists(strtoupper($countryCode), self::$formats);
+    }
+
+    public function __construct(
+        private ?string $accessToken, // This api actually works without an access token, but then rate limiting is applied.
+    ) {}
+
+    /** @inheritDoc */
+    public function getFormats(string $countryCode): Collection
+    {
+        if (! self::supports($countryCode)) {
+            throw UnsupportedCountryException::unsupported($countryCode);
+        }
+
+        return Collection::make(self::$formats[strtoupper($countryCode)]);
+    }
+
+    /** @inheritDoc */
+    public function isValidFormat(string $countryCode, string $vatNumber): bool
+    {
+        if (! self::supports($countryCode)) {
+            throw UnsupportedCountryException::unsupported($countryCode);
+        }
+
+        return $this
+            ->getFormats($countryCode)
+            ->whenEmpty(
+                fn (Collection $collection) => true,
+                function (Collection $collection) use ($vatNumber): bool {
+                    return $collection->filter(function (string $format) use ($vatNumber) {
+                        return true; // TODO: Fix this
+                    })->isNotEmpty();
+                }
+            );
+    }
+
+    /** @inheritDoc */
+    public function isValid(string $countryCode, string $vatNumber): bool
+    {
+        if (! $this->isValidFormat($countryCode, $vatNumber)) {
+            return false;
+        }
+
+        try {
+            $this->getInformation($countryCode, $vatNumber);
+
+            return true;
+        } catch (InvalidVatException $e) {
+            return false;
+        } catch (VatNotFoundException $e) {
+            return false; // The driver is "complete" so any number not found is assumed to be invalid
+        }
+    }
+
+    /** @inheritDoc */
+    public function validate(string $countryCode, string $vatNumber): void
+    {
+        // TODO: Implement
+    }
+
+    /** @inheritDoc */
+    public function getInformation(string $countryCode, string $vatNumber): VatInformation
+    {
+        $response = $this->searchByVatNumber($countryCode, $vatNumber);
+
+        if ($response->status() === 404) {
+            throw InvalidVatException::doesNotExist($vatNumber);
+        }
+
+        if ($response->isSuccessful()) {
+            throw new DriverUnavailable('CVR API is currently unavailable.');
+        }
+
+        return new VatInformation(
+            company: $response->json('name'),
+            vatNumber: $response->json('vat'),
+            contact: null,
+            address: $response->json('address'),
+            postalCode: $response->json('zipcode'),
+            city: $response->json('city'),
+            state: null,
+            region: null,
+            country: $countryCode,
+            sms: null,
+            phone: $response->json('phone'),
+            email: $response->json('email'),
+        );
+    }
+
+    private function getUrl(): string
+    {
+        return 'https://cvrapi.dk/api';
+    }
+
+    private function getUserAgent(): string
+    {
+        // Required format described here: https://cvrapi.dk/documentation
+        return 'SmartSend - VatService - Anders Bilfeldt anders@smartsend.io';
+    }
+
+    private function searchByVatNumber(string $countryCode, string $vatNumber): Response
+    {
+        return Http::withUserAgent($this->getUserAgent())
+            ->get($this->getUrl(), [
+                'vat' => $vatNumber,
+                'country' => $countryCode,
+                'version' => 6,
+                'format' => 'json',
+                'token' => $this->accessToken,
+            ]);
+    }
+}
\ No newline at end of file
diff --git a/src/VatServiceInterface.php b/src/VatServiceInterface.php
index dd1a312..b882688 100644
--- a/src/VatServiceInterface.php
+++ b/src/VatServiceInterface.php
@@ -13,6 +13,11 @@ interface VatServiceInterface
     public static function supports(string $countryCode): bool;
 
     /**
+     * Get the possible formats for the given country code.
+     *
+     * A star (*) means any number or letter while a hash (#)
+     * means any number and a question mark (?) means any letter.
+     *
      * @param string $countryCode
      * @return Collection<string>
      */