diff --git a/modules/entity_share_client/config/schema/remote.schema.yml b/modules/entity_share_client/config/schema/remote.schema.yml
index 5537f6e..9afa160 100644
--- a/modules/entity_share_client/config/schema/remote.schema.yml
+++ b/modules/entity_share_client/config/schema/remote.schema.yml
@@ -36,3 +36,6 @@ key.type.entity_share_basic_auth:
 
 key.type.entity_share_oauth:
   type: sequence
+
+key.type.entity_share_header:
+  type: sequence
diff --git a/modules/entity_share_client/src/Plugin/ClientAuthorization/Anonymous.php b/modules/entity_share_client/src/Plugin/ClientAuthorization/Anonymous.php
index f463542..a152ea0 100644
--- a/modules/entity_share_client/src/Plugin/ClientAuthorization/Anonymous.php
+++ b/modules/entity_share_client/src/Plugin/ClientAuthorization/Anonymous.php
@@ -28,41 +28,76 @@ class Anonymous extends ClientAuthorizationPluginBase {
    * {@inheritdoc}
    */
   public function getClient($url) {
-    return $this->httpClientFactory->fromOptions([
+    $credentials = $this->keyService->getCredentials($this);
+    $client = $this->httpClientFactory->fromOptions([
       'base_uri' => $url . '/',
       'cookies' => TRUE,
       'allow_redirects' => TRUE,
     ]);
+    if (!empty($credentials['login']) && !empty($credentials['password'])) {
+      $client['auth'] = [
+        $credentials['login'],
+        $credentials['password'],
+      ];
+    }
+    return $client;
   }
 
   /**
    * {@inheritdoc}
    */
   public function getJsonApiClient($url) {
-    return $this->httpClientFactory->fromOptions([
+    $credentials = $this->keyService->getCredentials($this);
+    $client = $this->httpClientFactory->fromOptions([
       'base_uri' => $url . '/',
       'headers' => [
         'Content-type' => 'application/vnd.api+json',
       ],
     ]);
+    if (!empty($credentials['login']) && !empty($credentials['password'])) {
+      $client['auth'] = [
+        $credentials['login'],
+        $credentials['password'],
+      ];
+    }
+    return $client;
   }
 
   /**
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    return $form + [
-      'credential_provider' => [],
-      'entity_share' => [],
+    $form = parent::buildConfigurationForm($form, $form_state);
+    $credentials = $this->keyService->getCredentials($this);
+
+    $form['entity_share']['#description'] = $this->t('Leave empty if Server website is not protected via HTTP Password.');
+    $form['entity_share']['login'] = [
+      '#type' => 'textfield',
+      '#required' => FALSE,
+      '#title' => $this->t('Login'),
+      '#default_value' => $credentials['login'] ?? '',
+    ];
+
+    $form['entity_share']['password'] = [
+      '#type' => 'password',
+      '#required' => FALSE,
+      '#title' => $this->t('Password'),
+      '#default_value' => $credentials['password'] ?? '',
     ];
+
+    if ($this->keyService->additionalProviders()) {
+      $this->expandedProviderOptions($form);
+      $form['key']['id']['#description'] = $this->t('Select the key you have configured to hold the HTTP Password credentials.');
+    }
+    return $form;
   }
 
   /**
    * {@inheritdoc}
    */
   public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
-    // To prevent validation from parent::validateConfigurationForm() as we
-    // don't have credentials here.
+    // To prevent validation from parent::validateConfigurationForm() as
+    // credentials is not required.
   }
 
 }
diff --git a/modules/entity_share_client/src/Plugin/ClientAuthorization/Header.php b/modules/entity_share_client/src/Plugin/ClientAuthorization/Header.php
new file mode 100644
index 0000000..1dc4218
--- /dev/null
+++ b/modules/entity_share_client/src/Plugin/ClientAuthorization/Header.php
@@ -0,0 +1,87 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Drupal\entity_share_client\Plugin\ClientAuthorization;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\entity_share_client\ClientAuthorization\ClientAuthorizationPluginBase;
+
+/**
+ * Provides Header based client authorization.
+ *
+ * @ClientAuthorization(
+ *   id = "header",
+ *   label = @Translation("Header"),
+ * )
+ */
+class Header extends ClientAuthorizationPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function checkIfAvailable() {
+    // Basic Auth is a core module which any server can enable.
+    return TRUE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getClient($url) {
+    $credentials = $this->keyService->getCredentials($this);
+    return $this->httpClientFactory->fromOptions([
+      'base_uri' => $url . '/',
+      'cookies' => TRUE,
+      'allow_redirects' => TRUE,
+      'headers' => [
+        'Content-type' => 'application/vnd.api+json',
+        $credentials['header_name'] => $credentials['header_value'],
+      ],
+    ]);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getJsonApiClient($url) {
+    $credentials = $this->keyService->getCredentials($this);
+    return $this->httpClientFactory->fromOptions([
+      'base_uri' => $url . '/',
+      'headers' => [
+        'Content-type' => 'application/vnd.api+json',
+        $credentials['header_name'] => $credentials['header_value'],
+      ],
+    ]);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form = parent::buildConfigurationForm($form, $form_state);
+    $credentials = $this->keyService->getCredentials($this);
+
+    $form['entity_share']['header_name'] = [
+      '#type' => 'textfield',
+      '#required' => TRUE,
+      '#title' => $this->t('Name'),
+      '#default_value' => $credentials['header_name'] ?? '',
+    ];
+
+    $form['entity_share']['header_value'] = [
+      '#type' => 'textfield',
+      '#required' => TRUE,
+      '#title' => $this->t('Value'),
+      '#default_value' => $credentials['header_value'] ?? '',
+    ];
+    if ($this->keyService->additionalProviders()) {
+      $this->expandedProviderOptions($form);
+      $form['key']['id']['#key_filters'] = ['type' => 'entity_share_header'];
+      $form['key']['id']['#description'] = $this->t('Select the key you have configured to hold the Header data.');
+    }
+
+    return $form;
+  }
+
+}
diff --git a/modules/entity_share_client/src/Plugin/KeyType/EntityShareHeader.php b/modules/entity_share_client/src/Plugin/KeyType/EntityShareHeader.php
new file mode 100644
index 0000000..a6c3cb5
--- /dev/null
+++ b/modules/entity_share_client/src/Plugin/KeyType/EntityShareHeader.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Drupal\entity_share_client\Plugin\KeyType;
+
+use Drupal\key\Plugin\KeyType\AuthenticationMultivalueKeyType;
+
+/**
+ * Key module plugin to define a header credentials KeyType.
+ *
+ * @KeyType(
+ *   id = "entity_share_header",
+ *   label = @Translation("Entity Share Header"),
+ *   description = @Translation("A key type to store Header data for the Entity Share module. Store as JSON:<br><pre>{<br>&quot;header_name&quot;: &quot;header name&quot;,<br>&quot;header_value&quot;: &quot;header value&quot;<br>}</pre>"),
+ *   group = "authentication",
+ *   key_value = {
+ *     "plugin" = "textarea_field"
+ *   },
+ *   multivalue = {
+ *     "enabled" = true,
+ *     "fields" = {
+ *       "header_name" = @Translation("Header name"),
+ *       "header_value" = @Translation("Header value")
+ *     }
+ *   }
+ * )
+ */
+class EntityShareHeader extends AuthenticationMultivalueKeyType {
+
+}