diff --git a/CHANGELOG.md b/CHANGELOG.md
index ffbab9d..7400263 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+* [PR-32](https://github.com/OS2web/os2web_datalookup/pull/32)
+  Adding Datafordeler address lookup
+
 ## [3.1.0] - 2026-04-27
 
 * [PR-29](https://github.com/OS2web/os2web_datalookup/pull/29)
diff --git a/src/LookupResult/AddressLookupResult.php b/src/LookupResult/AddressLookupResult.php
new file mode 100644
index 0000000..22ec355
--- /dev/null
+++ b/src/LookupResult/AddressLookupResult.php
@@ -0,0 +1,361 @@
+<?php
+
+namespace Drupal\os2web_datalookup\LookupResult;
+
+/**
+ * Representation or value object for the result of an address lookup.
+ */
+class AddressLookupResult {
+
+  /**
+   * Is request successful.
+   *
+   * @var bool
+   */
+  protected bool $successful = FALSE;
+
+  /**
+   * Status of the request.
+   *
+   * @var string
+   */
+  protected string $errorMessage;
+
+  /**
+   * ID of the address number.
+   *
+   * @var string
+   */
+  protected string $id;
+
+  /**
+   * Address house ID.
+   *
+   * @var string
+   */
+  protected $houseId;
+
+  /**
+   * Full address.
+   *
+   * @var string
+   */
+  protected string $fullAddress;
+
+  /**
+   * Street of the address.
+   *
+   * @var string
+   */
+  protected string $street;
+
+  /**
+   * Street house number.
+   *
+   * @var string
+   */
+  protected string $houseNr;
+
+  /**
+   * Floor number.
+   *
+   * @var string
+   */
+  protected string $floor;
+
+  /**
+   * Apartment number.
+   *
+   * @var string
+   */
+  protected string $apartmentNr;
+
+  /**
+   * Postal code.
+   *
+   * @var string
+   */
+  protected string $postalCode;
+
+  /**
+   * City.
+   *
+   * @var string
+   */
+  protected string $city;
+
+  /**
+   * Municipality code.
+   *
+   * @var string
+   */
+  protected string $municipalityCode;
+
+  /**
+   * Supplementary city.
+   *
+   * @var string
+   */
+  protected string $supplementaryCity;
+
+  /**
+   * Check successfulness state.
+   *
+   * @return bool
+   *   TRUE on success else FALSE.
+   */
+  public function isSuccessful(): bool {
+    return $this->successful;
+  }
+
+  /**
+   * Set state of successfulness.
+   *
+   * @param bool $successful
+   *   The state.
+   */
+  public function setSuccessful(bool $successful = TRUE): void {
+    $this->successful = $successful;
+  }
+
+  /**
+   * Get an error message.
+   *
+   * @return string
+   *   The message.
+   */
+  public function getErrorMessage(): string {
+    return $this->errorMessage;
+  }
+
+  /**
+   * Set error message.
+   *
+   * @param string $errorMessage
+   *   The message.
+   */
+  public function setErrorMessage(string $errorMessage): void {
+    $this->errorMessage = $errorMessage;
+  }
+
+  /**
+   * Get ID.
+   *
+   * @return string
+   *   The ID number.
+   */
+  public function getId(): string {
+    return $this->id;
+  }
+
+  /**
+   * Set ID.
+   *
+   * @param string $id
+   *   ID number.
+   */
+  public function setId(string $id): void {
+    $this->id = $id;
+  }
+
+  /**
+   * Get house ID.
+   *
+   * @return string
+   *   Access id number.
+   */
+  public function getHouseId(): string {
+    return $this->houseId;
+  }
+
+  /**
+   * Sets house ID.
+   *
+   * @param string $houseId
+   *   Access id number.
+   */
+  public function setHouseId(string $houseId): void {
+    $this->houseId = $houseId;
+  }
+
+  /**
+   * Get full address.
+   *
+   * @return string
+   *   The full address.
+   */
+  public function getFullAddress(): string {
+    return $this->fullAddress;
+  }
+
+  /**
+   * Set full address.
+   *
+   * @param string $fullAddress
+   *   The full address.
+   */
+  public function setFullAddress(string $fullAddress): void {
+    $this->fullAddress = $fullAddress;
+  }
+
+  /**
+   * Get street.
+   *
+   * @return string
+   *   The street.
+   */
+  public function getStreet(): string {
+    return $this->street;
+  }
+
+  /**
+   * Set street.
+   *
+   * @param string $street
+   *   The street.
+   */
+  public function setStreet(string $street): void {
+    $this->street = $street;
+  }
+
+  /**
+   * Get house number.
+   *
+   * @return string
+   *   The number.
+   */
+  public function getHouseNr(): string {
+    return $this->houseNr;
+  }
+
+  /**
+   * Set house number.
+   *
+   * @param string $houseNr
+   *   The number.
+   */
+  public function setHouseNr(string $houseNr): void {
+    $this->houseNr = $houseNr;
+  }
+
+  /**
+   * Get floor.
+   *
+   * @return string
+   *   The floor.
+   */
+  public function getFloor(): string {
+    return $this->floor;
+  }
+
+  /**
+   * Set floor.
+   *
+   * @param string $floor
+   *   The floor.
+   */
+  public function setFloor(string $floor): void {
+    $this->floor = $floor;
+  }
+
+  /**
+   * Get apartment number.
+   *
+   * @return string
+   *   The number.
+   */
+  public function getApartmentNr(): string {
+    return $this->apartmentNr;
+  }
+
+  /**
+   * Set apartment number.
+   *
+   * @param string $apartmentNr
+   *   The number.
+   */
+  public function setApartmentNr(string $apartmentNr): void {
+    $this->apartmentNr = $apartmentNr;
+  }
+
+  /**
+   * Get postal code.
+   *
+   * @return string
+   *   The code.
+   */
+  public function getPostalCode(): string {
+    return $this->postalCode;
+  }
+
+  /**
+   * Set postal code.
+   *
+   * @param string $postalCode
+   *   The code.
+   */
+  public function setPostalCode(string $postalCode): void {
+    $this->postalCode = $postalCode;
+  }
+
+  /**
+   * Get city name.
+   *
+   * @return string
+   *   The city name.
+   */
+  public function getCity(): string {
+    return $this->city;
+  }
+
+  /**
+   * Set city.
+   *
+   * @param string $city
+   *   The city name.
+   */
+  public function setCity(string $city): void {
+    $this->city = $city;
+  }
+
+  /**
+   * Get municipality code.
+   *
+   * @return string
+   *   The code.
+   */
+  public function getMunicipalityCode(): string {
+    return $this->municipalityCode;
+  }
+
+  /**
+   * Set municipality code.
+   *
+   * @param string $municipalityCode
+   *   The municipality code.
+   */
+  public function setMunicipalityCode(string $municipalityCode): void {
+    $this->municipalityCode = $municipalityCode;
+  }
+
+  /**
+   * Set supplementary locality / village name.
+   *
+   * @param string $supplementaryCity
+   *   Supplementary city name.
+   */
+  public function setSupplementaryCity(string $supplementaryCity): void {
+    $this->supplementaryCity = $supplementaryCity;
+  }
+
+  /**
+   * Get supplementary locality / village name.
+   *
+   * @return string
+   *   Supplementary city name.
+   */
+  public function getSupplementaryCity(): string {
+    return $this->supplementaryCity;
+  }
+
+}
diff --git a/src/LookupResult/MatrikulaLookupResult.php b/src/LookupResult/MatrikulaLookupResult.php
new file mode 100644
index 0000000..80b91d9
--- /dev/null
+++ b/src/LookupResult/MatrikulaLookupResult.php
@@ -0,0 +1,95 @@
+<?php
+
+namespace Drupal\os2web_datalookup\LookupResult;
+
+/**
+ * Class MatrikulaLookupResult.
+ *
+ * Wrapper class for Matrikula object that easies
+ * the matrikula property access.
+ */
+class MatrikulaLookupResult {
+
+  /**
+   * Owner licence code / ejerlavskode.
+   *
+   * @var string
+   */
+  protected string $ownerLicenseCode;
+
+  /**
+   * Ownership name / ejerlavsnavn.
+   *
+   * @var string
+   */
+  protected string $ownershipName;
+
+
+  /**
+   * Matrikula number / matrikelnummer.
+   *
+   * @var string
+   */
+  protected string $matrikulaNumber;
+
+  /**
+   * Returns owner license code.
+   *
+   * @param string $ownerLicenseCode
+   *   Owner license code.
+   */
+  public function setOwnerLicenseCode(string $ownerLicenseCode): void {
+    $this->ownerLicenseCode = $ownerLicenseCode;
+  }
+
+  /**
+   * Returns owner license code.
+   *
+   * @return string
+   *   Owners license code.
+   */
+  public function getOwnerLicenseCode(): string {
+    return $this->ownerLicenseCode;
+  }
+
+  /**
+   * Sets ownership name.
+   *
+   * @param string $ownershipName
+   *   Ownership name.
+   */
+  public function setOwnershipName(string $ownershipName): void {
+    $this->ownershipName = $ownershipName;
+  }
+
+  /**
+   * Returns ownership name.
+   *
+   * @return string
+   *   Ownership name.
+   */
+  public function getOwnershipName(): string {
+    return $this->ownershipName;
+  }
+
+  /**
+   * Sets matrikula number.
+   *
+   * @param string $matrikulaNumber
+   *   Matrikula number.
+   */
+  public function setMatrikulaNumber(string $matrikulaNumber): void {
+    $this->matrikulaNumber = $matrikulaNumber;
+  }
+
+  /**
+   * Returns matrikula number.
+   *
+   * @return string
+   *   Matrikula number.
+   */
+  public function getMatrikulaNumber(): string {
+    return $this->matrikulaNumber;
+  }
+
+}
diff --git a/src/Plugin/os2web/DataLookup/DatafordelerAddressLookup.php b/src/Plugin/os2web/DataLookup/DatafordelerAddressLookup.php
new file mode 100644
index 0000000..af222af
--- /dev/null
+++ b/src/Plugin/os2web/DataLookup/DatafordelerAddressLookup.php
@@ -0,0 +1,227 @@
+<?php
+
+namespace Drupal\os2web_datalookup\Plugin\os2web\DataLookup;
+
+use Drupal\Core\File\FileSystem;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\key\KeyRepositoryInterface;
+use Drupal\os2web_audit\Service\Logger;
+use Drupal\os2web_datalookup\LookupResult\AddressLookupResult;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\GuzzleException;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+/**
+ * Defines a plugin for Datafordeler address lookup.
+ *
+ * @DataLookup(
+ *   id = "datafordeler_address_lookup",
+ *   label = @Translation("Datafordeler Address Lookup")
+ * )
+ */
+class DatafordelerAddressLookup extends DataLookupBase implements DatafordelerAddressLookupInterface, ContainerFactoryPluginInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(
+    array $configuration,
+    $plugin_id,
+    $plugin_definition,
+    protected ClientInterface $httpClient,
+    Logger $auditLogger,
+    KeyRepositoryInterface $keyRepository,
+    FileSystem $fileSystem,
+  ) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition, $auditLogger, $keyRepository, $fileSystem);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    /** @var \Drupal\os2web_audit\Service\Logger $auditLogger */
+    $auditLogger = $container->get('os2web_audit.logger');
+    /** @var \Drupal\key\KeyRepositoryInterface $keyRepository */
+    $keyRepository = $container->get('key.repository');
+    /** @var \Drupal\Core\File\FileSystem $fileSystem */
+    $fileSystem = $container->get('file_system');
+
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('http_client'),
+      $auditLogger,
+      $keyRepository,
+      $fileSystem,
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getAddressMatches(ParameterBag $params, $fetchColumn = 'titel') : array {
+    $token = $this->getConfiguration()['token'];
+    $url = "https://adressevaelger.dk/adresser/soeg";
+
+    // Get autocomplete query.
+    $q = $params->get('q') ?: '';
+    // Adding limit by municipality limit, if present.
+    $limitByMunicipality = $params->get('limit_by_municipality') ?: '';
+
+    $query = [
+      'token' => $token,
+      'tekst' => $q,
+    ];
+
+    if (!empty($limitByMunicipality)) {
+      $query['kommunekode'] = $limitByMunicipality;
+    }
+
+    try {
+      $json = $this->httpClient->request('GET', $url, [
+        'query' => $query,
+      ])->getBody();
+    }
+    catch (GuzzleException $e) {
+      \Drupal::logger('os2web_datalookup')->warning('Request failed: @e', ['@e' => $e->getMessage()]);
+      return [];
+    }
+
+    $jsonDecoded = json_decode($json, TRUE);
+    $addresses = [];
+    if (is_array($jsonDecoded) && !empty($jsonDecoded['fund'])) {
+      $addresses = $jsonDecoded['fund'];
+    }
+
+    if ($fetchColumn) {
+      // Checking if remove_place_name is enabled.
+      $removePlaceName = $params->get('remove_place_name') ?: '';
+      if ($removePlaceName) {
+        foreach ($addresses as &$entry) {
+          $addressId = $entry['id'];
+
+          $address = $this->fetchAddressLookupResult($addressId);
+          if ($supplerendebynavn = $address->getSupplementaryCity()) {
+            $entry['titel'] = preg_replace("/$supplerendebynavn,/", '', $entry['titel']);
+          }
+        }
+      }
+
+      $matches = array_column($addresses, $fetchColumn);
+    }
+    else {
+      $matches = $addresses;
+    }
+
+    return $matches;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getSingleAddress(ParameterBag $params) : ?AddressLookupResult {
+    $address = NULL;
+
+    // Getting address_id.
+    $matches = $this->getAddressMatches($params, NULL);
+    if (!empty($matches)) {
+      $addressSource = $matches[0];
+
+      // Fetching address.
+      $address = $this->fetchAddressLookupResult($addressSource['id']);
+    }
+
+    return $address;
+  }
+
+  /**
+   * Returns single address from address API.
+   *
+   * @param string $id
+   *   ID of the address.
+   *
+   * @return \Drupal\os2web_datalookup\LookupResult\AddressLookupResult
+   *   The found address.
+   */
+  public function fetchAddressLookupResult($id) {
+    $token = $this->getConfiguration()['token'];
+    $url = "https://adressevaelger.dk/adresser/$id";
+
+    $address = new AddressLookupResult();
+    $address->setSuccessful(FALSE);
+
+    // Fetching address.
+    try {
+      $json = $this->httpClient->request('GET', $url, [
+        'query' => [
+          'token' => $token,
+        ],
+      ])->getBody();
+    }
+    catch (GuzzleException $e) {
+      \Drupal::logger('os2web_datalookup')->warning('Request failed: @e', ['@e' => $e->getMessage()]);
+      return $address;
+    }
+
+    $jsonDecoded = json_decode($json, TRUE);
+    if (is_array($jsonDecoded) && !empty($jsonDecoded)) {
+      if ($jsonDecoded['status'] === 'ok') {
+        $address->setSuccessful();
+
+        $address_raw = $jsonDecoded['adresse'];
+        $address->setId($address_raw['id_lokalid']);
+        $address->setHouseId($address_raw['husnummer']['id_lokalid']);
+        $address->setFullAddress($address_raw['adressebetegnelse']);
+
+        $address->setStreet($address_raw['husnummer']['vejnavn'] ?? '');
+        $address->setHouseNr($address_raw['husnummer']['husnummertekst'] ?? '');
+        $address->setFloor($address_raw['etagebetegnelse'] ?? '');
+        $address->setApartmentNr($address_raw['doerbetegnelse'] ?? '');
+        $address->setPostalCode($address_raw['husnummer']['postnummer']['postnr'] ?? '');
+        $address->setCity($address_raw['husnummer']['postnummer']['navn'] ?? '');
+        $address->setMunicipalityCode($address_raw['husnummer']['navngivenvejkommunedel']['kommune'] ?? '');
+        $address->setSupplementaryCity($address_raw['husnummer']['supplerendebynavn']['navn'] ?? '');
+      }
+    }
+
+    return $address;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration(): array {
+    return [
+      'token' => '',
+    ] + parent::defaultConfiguration();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form['token'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Token for service calls'),
+      '#default_value' => $this->configuration['token'] ?? '',
+      '#required' => TRUE,
+      '#description' => $this->t('Token required for performing API requests'),
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+    $configuration = $this->getConfiguration();
+    $configuration['token'] = $form_state->getValue('token');
+    $this->setConfiguration($configuration);
+  }
+
+}
diff --git a/src/Plugin/os2web/DataLookup/DatafordelerAddressLookupInterface.php b/src/Plugin/os2web/DataLookup/DatafordelerAddressLookupInterface.php
new file mode 100644
index 0000000..c474f04
--- /dev/null
+++ b/src/Plugin/os2web/DataLookup/DatafordelerAddressLookupInterface.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace Drupal\os2web_datalookup\Plugin\os2web\DataLookup;
+
+use Drupal\os2web_datalookup\LookupResult\AddressLookupResult;
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+/**
+ * DatafordelerDataLookupInterface plugin interface.
+ *
+ * Provides functions for getting the plugin configuration values.
+ *
+ * @ingroup plugin_api
+ */
+interface DatafordelerAddressLookupInterface extends DataLookupInterface {
+
+  /**
+   * Returns array of matches for 'os2forms_dawa_address' element autocomplete.
+   *
+   * @param \Symfony\Component\HttpFoundation\ParameterBag $params
+   *   The query params.
+   * @param string $fetchColumn
+   *   The name of the column to return, set to NULL to get all columns.
+   *
+   * @return array
+   *   Array of matches.
+   */
+  public function getAddressMatches(ParameterBag $params, $fetchColumn = 'titel') : array;
+
+  /**
+   * Returns single address from address API.
+   *
+   * @param \Symfony\Component\HttpFoundation\ParameterBag $params
+   *   The query params.
+   *
+   * @return \Drupal\os2web_datalookup\LookupResult\AddressLookupResult|null
+   *   The found address.
+   */
+  public function getSingleAddress(ParameterBag $params) : ?AddressLookupResult;
+
+}
diff --git a/src/Plugin/os2web/DataLookup/DatafordelerMatrikulaLookup.php b/src/Plugin/os2web/DataLookup/DatafordelerMatrikulaLookup.php
new file mode 100644
index 0000000..dc2a908
--- /dev/null
+++ b/src/Plugin/os2web/DataLookup/DatafordelerMatrikulaLookup.php
@@ -0,0 +1,190 @@
+<?php
+
+namespace Drupal\os2web_datalookup\Plugin\os2web\DataLookup;
+
+use Drupal\Component\Utility\NestedArray;
+use Drupal\Core\File\FileSystem;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\key\KeyRepositoryInterface;
+use Drupal\os2web_audit\Service\Logger;
+use Drupal\os2web_datalookup\LookupResult\MatrikulaLookupResult;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\GuzzleException;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Defines a plugin for Datafordeler Data.
+ *
+ * @DataLookup(
+ *   id = "datafordeler_matrikula_lookup",
+ *   label = @Translation("Datafordeler Matrikula Lookup"),
+ * )
+ */
+class DatafordelerMatrikulaLookup extends DataLookupBase implements DatafordelerMatrikulaLookupInterface, ContainerFactoryPluginInterface {
+
+  /**
+   * Logger channel.
+   *
+   * @var \Psr\Log\LoggerInterface
+   */
+  protected LoggerInterface $logger;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(
+    array $configuration,
+    $plugin_id,
+    $plugin_definition,
+    protected ClientInterface $httpClient,
+    Logger $auditLogger,
+    KeyRepositoryInterface $keyRepository,
+    FileSystem $fileSystem,
+    LoggerInterface $logger,
+  ) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition, $auditLogger, $keyRepository, $fileSystem);
+    $this->logger = $logger;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    /** @var \Drupal\os2web_audit\Service\Logger $auditLogger */
+    $auditLogger = $container->get('os2web_audit.logger');
+    /** @var \Drupal\key\KeyRepositoryInterface $keyRepository */
+    $keyRepository = $container->get('key.repository');
+    /** @var \Drupal\Core\File\FileSystem $fileSystem */
+    $fileSystem = $container->get('file_system');
+
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('http_client'),
+      $auditLogger,
+      $keyRepository,
+      $fileSystem,
+      $container->get('logger.factory')->get('os2web_datalookup')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getMatrikulaId(string $addressAccessId) : ?string {
+    $url = "https://services.datafordeler.dk/DAR/DAR/3.0.0/rest/husnummerTilJordstykke";
+
+    try {
+      $json = $this->httpClient->request('GET', $url, [
+        'query' => [
+          'husnummerid' => $addressAccessId,
+        ],
+      ])->getBody();
+    }
+    catch (GuzzleException $e) {
+      $this->logger->warning('Request failed: @e', ['@e' => $e->getMessage()]);
+
+      return NULL;
+    }
+
+    $jsonDecoded = json_decode($json, TRUE);
+    if (is_array($jsonDecoded)) {
+      if (NestedArray::keyExists($jsonDecoded, ['gældendeJordstykke', 'jordstykkeLokalId'])) {
+        return NestedArray::getValue($jsonDecoded, ['gældendeJordstykke', 'jordstykkeLokalId']);
+      }
+    }
+
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getMatrikulaEntries(string $matrikulaId) : array {
+    $matrikulaEntries = [];
+    $url = "https://services.datafordeler.dk/Matriklen2/Matrikel/2.0.0/rest/SamletFastEjendom";
+
+    $configuration = $this->getConfiguration();
+
+    try {
+      $json = $this->httpClient->request('GET', $url, [
+        'query' => [
+          'jordstykkeid' => $matrikulaId,
+          'username' => $configuration['username'],
+          'password' => $configuration['password'],
+        ],
+      ])->getBody();
+    }
+    catch (GuzzleException $e) {
+      $this->logger->warning('Request failed: @e', ['@e' => $e->getMessage()]);
+
+      return $matrikulaEntries;
+    }
+
+    $jsonDecoded = json_decode($json, TRUE);
+
+    if (is_array($jsonDecoded)) {
+      if (NestedArray::keyExists($jsonDecoded, ['features', 0, 'properties', 'jordstykke'])) {
+        $jordstykker = NestedArray::getValue($jsonDecoded, ['features', 0, 'properties', 'jordstykke']);
+        foreach ($jordstykker as $jordstyk) {
+          if (isset($jordstyk['properties']) && !empty($jordstyk['properties'])) {
+            $matrikula = new MatrikulaLookupResult();
+            $matrikula->setOwnerLicenseCode($jordstyk['properties']['ejerlavskode']);
+            $matrikula->setOwnershipName($jordstyk['properties']['ejerlavsnavn']);
+            $matrikula->setMatrikulaNumber($jordstyk['properties']['matrikelnummer']);
+
+            $matrikulaEntries[] = $matrikula;
+          }
+        }
+      }
+    }
+
+    return $matrikulaEntries;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration(): array {
+    return [
+      'username' => '',
+      'password' => '',
+    ] + parent::defaultConfiguration();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form['username'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Username for service calls'),
+      '#default_value' => $this->configuration['username'],
+      '#required' => TRUE,
+      '#description' => $this->t('Username required for performing API requests'),
+    ];
+    $form['password'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Password for service calls'),
+      '#default_value' => $this->configuration['password'],
+      '#required' => TRUE,
+      '#description' => $this->t('Password required for performing API requests'),
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+    $configuration = $this->getConfiguration();
+    $configuration['username'] = $form_state->getValue('username');
+    $configuration['password'] = $form_state->getValue('password');
+    $this->setConfiguration($configuration);
+  }
+
+}
diff --git a/src/Plugin/os2web/DataLookup/DatafordelerMatrikulaLookupInterface.php b/src/Plugin/os2web/DataLookup/DatafordelerMatrikulaLookupInterface.php
new file mode 100644
index 0000000..4595062
--- /dev/null
+++ b/src/Plugin/os2web/DataLookup/DatafordelerMatrikulaLookupInterface.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Drupal\os2web_datalookup\Plugin\os2web\DataLookup;
+
+/**
+ * DatafordelerDataLookupInterface plugin interface.
+ *
+ * Provides functions for getting the plugin configuration values.
+ *
+ * @ingroup plugin_api
+ */
+interface DatafordelerMatrikulaLookupInterface extends DataLookupInterface {
+
+  /**
+   * Returns of ID for Matrikula / jordstykke related with this address.
+   *
+   * @param string $addressAccessId
+   *   Address to make search against.
+   *
+   * @return string|null
+   *   IDs of matrikula.
+   */
+  public function getMatrikulaId(string $addressAccessId) : ?string;
+
+  /**
+   * Returns matrikula entries that is found byt this ID.
+   *
+   * @param string $matrikulaId
+   *   Id to make search  against.
+   *
+   * @return array
+   *   Matrikula entries list.
+   */
+  public function getMatrikulaEntries(string $matrikulaId) : array;
+
+}