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diff --git a/web/modules/contrib/libraries/src/ExternalLibrary/Definition/GuzzleDefinitionDiscovery.php b/web/modules/contrib/libraries/src/ExternalLibrary/Definition/GuzzleDefinitionDiscovery.php
new file mode 100644
index 000000000..59745b78c
--- /dev/null
+++ b/web/modules/contrib/libraries/src/ExternalLibrary/Definition/GuzzleDefinitionDiscovery.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace Drupal\libraries\ExternalLibrary\Definition;
+
+use Drupal\Component\Serialization\SerializationInterface;
+use Drupal\libraries\ExternalLibrary\Exception\LibraryDefinitionNotFoundException;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\GuzzleException;
+
+/**
+ * Provides a definition discovery that fetches remote definitions using Guzzle.
+ *
+ * By default JSON files are assumed to be in JSON format.
+ *
+ * @todo Cache responses statically by ID to avoid multiple HTTP requests when
+ *   calling hasDefinition() and getDefinition() sequentially.
+ */
+class GuzzleDefinitionDiscovery extends FileDefinitionDiscoveryBase implements DefinitionDiscoveryInterface {
+
+  /**
+   * The HTTP client.
+   *
+   * @var \GuzzleHttp\ClientInterface
+   */
+  protected $httpClient;
+
+  /**
+   * Constructs a Guzzle-based definition discvoery.
+   *
+   * @param \GuzzleHttp\ClientInterface $http_client
+   *   The HTTP client.
+   * @param \Drupal\Component\Serialization\SerializationInterface $serializer
+   *   The serializer for the library definition files.
+   * @param string $base_url
+   *   The base URL for the library files.
+   */
+  public function __construct(ClientInterface $http_client, SerializationInterface $serializer, $base_url) {
+    parent::__construct($serializer, $base_url);
+    $this->httpClient = $http_client;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function hasDefinition($id) {
+    try {
+      $response = $this->httpClient->request('GET', $this->getFileUri($id));
+      return $response->getStatusCode() === 200;
+    }
+    catch (GuzzleException $exception) {
+      return FALSE;
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getSerializedDefinition($id) {
+    try {
+      $response = $this->httpClient->request('GET', $this->getFileUri($id));
+      return (string) $response->getBody();
+    }
+    catch (GuzzleException $exception) {
+      throw new LibraryDefinitionNotFoundException($id, '', 0, $exception);
+    }
+    catch (\RuntimeException $exception) {
+      throw new LibraryDefinitionNotFoundException($id, '', 0, $exception);
+    }
+  }
+
+}