diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5be1890..e861fdf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+* Datafordeler CVR service endpoint update - GraphQL. 
 
 ## [3.0.3] - 2025-11-19
 
diff --git a/src/Plugin/os2web/DataLookup/DatafordelerCVR.php b/src/Plugin/os2web/DataLookup/DatafordelerCVR.php
index a83b6bb..81c429e 100644
--- a/src/Plugin/os2web/DataLookup/DatafordelerCVR.php
+++ b/src/Plugin/os2web/DataLookup/DatafordelerCVR.php
@@ -6,7 +6,9 @@
 use Drupal\Core\Messenger\MessengerInterface;
 use Drupal\Core\Render\Markup;
 use Drupal\os2web_datalookup\LookupResult\CompanyLookupResult;
-use GuzzleHttp\Exception\ClientException;
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\GuzzleException;
+use Psr\Http\Message\ResponseInterface;
 
 /**
  * Defines a plugin for DatafordelerCVR.
@@ -17,14 +19,22 @@
  *   group = "cvr_lookup"
  * )
  */
-class DatafordelerCVR extends DatafordelerBase implements DataLookupCompanyInterface {
+class DatafordelerCVR extends DataLookupBase implements DataLookupCompanyInterface {
+
+  /**
+   * Http client.
+   *
+   * @var \GuzzleHttp\Client
+   */
+  protected Client $httpClient;
 
   /**
    * {@inheritdoc}
    */
   public function defaultConfiguration(): array {
     return [
-      'webserviceurl_live' => 'https://s5-certservices.datafordeler.dk/CVR/HentCVRData/1/REST/',
+      'webserviceurl_live' => 'https://graphql.datafordeler.dk/flexibleCurrent/v1',
+      'api_key' => '',
     ] + parent::defaultConfiguration();
   }
 
@@ -32,7 +42,18 @@ public function defaultConfiguration(): array {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state): array {
-    $form = parent::buildConfigurationForm($form, $form_state);
+    $form['webserviceurl_live'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Webservice URL (LIVE)'),
+      '#description' => $this->t('Live URL against which to make the request, e.g. https://graphql.datafordeler.dk/flexibleCurrent/v1'),
+      '#default_value' => $this->configuration['webserviceurl_live'],
+    ];
+
+    $form['api_key'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('API Key'),
+      '#default_value' => $this->configuration['api_key'],
+    ];
 
     $form['test_cvr'] = [
       '#type' => 'textfield',
@@ -46,7 +67,12 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
    * {@inheritdoc}
    */
   public function submitConfigurationForm(array &$form, FormStateInterface $form_state): void {
-    parent::submitConfigurationForm($form, $form_state);
+    $keys = array_keys($this->defaultConfiguration());
+    $configuration = $this->getConfiguration();
+    foreach ($keys as $key) {
+      $configuration[$key] = $form_state->getValue($key);
+    }
+    $this->setConfiguration($configuration);
 
     if (!empty($form_state->getValue('test_cvr'))) {
       $lookupResult = $this->lookup($form_state->getValue('test_cvr'));
@@ -64,28 +90,34 @@ public function submitConfigurationForm(array &$form, FormStateInterface $form_s
    */
   public function lookup(string $param): CompanyLookupResult {
     try {
+      if (!preg_match('/^\d{8}$/', $param)) {
+        throw new \InvalidArgumentException('CVR must be exactly 8 digits.');
+      }
+
       $msg = sprintf('Hent virksomhed med CVRNummer: %s', $param);
       $this->auditLogger->info('DataLookup', $msg);
-      $response = $this->getResponse('hentVirksomhedMedCVRNummer', ['query' => ['pCVRNummer' => $param]]);
+      $response = $this->executeQuery($param);
       $result = json_decode((string) $response->getBody());
     }
-    catch (ClientException $e) {
+    catch (GuzzleException | \InvalidArgumentException $e) {
       $msg = sprintf('Hent virksomhed med CVRNummer (%s): %s', $param, $e->getMessage());
       $this->auditLogger->error('DataLookup', $msg);
       $result = $e->getMessage();
     }
 
     $cvrResult = new CompanyLookupResult();
-    if ($result && isset($result->virksomhed) && !empty((array) $result->virksomhed)) {
+    if ($result && isset($result->data->CVR_Virksomhed->nodes) && !empty($result->data->CVR_Virksomhed->nodes)) {
+      $companyGraph = $result->data->CVR_Virksomhed->nodes[0]->id_CVR_CVREnhed_id_ref->nodes[0];
+
       $cvrResult->setSuccessful();
       $cvrResult->setCvr($param);
 
-      if ($result->virksomhedsnavn) {
-        $cvrResult->setName($result->virksomhedsnavn->vaerdi);
+      if ($companyGraph->id_CVR_Navn_CVREnhedsId_ref) {
+        $cvrResult->setName($companyGraph->id_CVR_Navn_CVREnhedsId_ref->vaerdi);
       }
 
-      if ($result->beliggenhedsadresse) {
-        $address = $result->beliggenhedsadresse;
+      if ($companyGraph->id_CVR_Adressering_CVREnhedsId_ref) {
+        $address = $companyGraph->id_CVR_Adressering_CVREnhedsId_ref->nodes[0];
 
         $cvrResult->setStreet($address->CVRAdresse_vejnavn ?? '');
         $cvrResult->setHouseNr($address->CVRAdresse_husnummerFra ?? '');
@@ -124,4 +156,64 @@ public function lookup(string $param): CompanyLookupResult {
     return $cvrResult;
   }
 
+  /**
+   * Executes the GraphQL lookup request for a specific CVR number.
+   *
+   * Builds the GraphQL payload and sends it to the configured Datafordeler
+   * endpoint using the shared HTTP request flow from the parent class.
+   *
+   * @param string $cvr
+   *   The CVR number to look up.
+   *
+   * @return \Psr\Http\Message\ResponseInterface
+   *   The raw HTTP response from the GraphQL endpoint.
+   *
+   * @throws \GuzzleHttp\Exception\GuzzleException
+   */
+  private function executeQuery($cvr): ResponseInterface {
+    $this->httpClient = new Client();
+
+    // Setting date to TODAY 00:00:00, so that we are always getting up-to-date
+    // information.
+    $virkningstid = (new \DateTimeImmutable('today', new \DateTimeZone('UTC')))
+      ->format('Y-m-d\T00:00:00\Z');
+
+    $query = <<<GRAPHQL
+{ CVR_Virksomhed(first: 1, virkningstid: "{$virkningstid}", where: { CVRNummer: { eq: {$cvr} } }) {
+    nodes {
+      CVRNummer
+      id_CVR_CVREnhed_id_ref(first: 1) {
+        nodes {
+          id_CVR_Navn_CVREnhedsId_ref { vaerdi }
+          id_CVR_Adressering_CVREnhedsId_ref(first: 1, where: { AdresseringAnvendelse: { in: ["beliggenhedsadresse", "postadresse"] } }) {
+            nodes {
+              AdresseringAnvendelse
+              CVRAdresse_vejnavn
+              CVRAdresse_husnummerFra
+              CVRAdresse_etagebetegnelse
+              CVRAdresse_doerbetegnelse
+              CVRAdresse_postnummer
+              CVRAdresse_postdistrikt
+              CVRAdresse_kommunekode
+            }
+          }
+        }
+      }
+    }
+  }
+}
+GRAPHQL;
+
+    $webserviceUrl = $this->configuration['webserviceurl_live'];
+
+    return $this->httpClient->post($webserviceUrl, [
+      'query' => [
+        'apiKey' => $this->configuration['api_key'],
+      ],
+      'json' => [
+        'query' => $query,
+      ],
+    ]);
+  }
+
 }