diff --git a/spec/UserDataItemSpec.php b/spec/UserDataItemSpec.php
index cbe3477..2b69977 100644
--- a/spec/UserDataItemSpec.php
+++ b/spec/UserDataItemSpec.php
@@ -3,6 +3,7 @@
 namespace spec\Blockvis\Civic\Sip;
 
 use Blockvis\Civic\Sip\UserDataItem;
+use JsonSerializable;
 use PhpSpec\ObjectBehavior;
 
 class UserDataItemSpec extends ObjectBehavior
@@ -17,6 +18,17 @@ function it_is_initializable()
         $this->shouldHaveType(UserDataItem::class);
     }
 
+    function it_is_json_serializable()
+    {
+    	$this->shouldImplement(JsonSerializable::class);
+    	assert(json_encode($this->getWrappedObject()) === json_encode([
+    		'label' => 'label',
+		    'value' => 'value',
+		    'isValid' => true,
+		    'isOwner' => false,
+		]), 'JSON representation');
+    }
+
     public function it_is_readable()
     {
         $this->label()->shouldBe('label');
diff --git a/spec/UserDataSpec.php b/spec/UserDataSpec.php
index 97274df..9cb7591 100644
--- a/spec/UserDataSpec.php
+++ b/spec/UserDataSpec.php
@@ -3,6 +3,7 @@
 namespace spec\Blockvis\Civic\Sip;
 
 use Blockvis\Civic\Sip\UserData;
+use JsonSerializable;
 use PhpSpec\ObjectBehavior;
 
 class UserDataSpec extends ObjectBehavior
@@ -22,6 +23,15 @@ function it_is_initializable()
         $this->shouldHaveType(UserData::class);
     }
 
+    function it_is_json_serializable()
+    {
+    	$this->shouldImplement(JsonSerializable::class);
+    	assert(json_encode($this->getWrappedObject()) === json_encode([
+			    ['label' => 'label1', 'value' => 'value1', 'isValid' => true, 'isOwner' => true],
+			    ['label' => 'label2', 'value' => 'value2', 'isValid' => true, 'isOwner' => false],
+		    ]), 'JSON representation');
+    }
+
     function it_returns_data_items()
     {
         $items = $this->items();
diff --git a/src/UserData.php b/src/UserData.php
index 2d04146..86eb8d3 100644
--- a/src/UserData.php
+++ b/src/UserData.php
@@ -2,7 +2,9 @@
 
 namespace Blockvis\Civic\Sip;
 
-class UserData
+use JsonSerializable;
+
+class UserData implements JsonSerializable
 {
     /**
      * @var UserDataItem[]
@@ -47,6 +49,14 @@ public function items(): array
         return array_values($this->items);
     }
 
+	/**
+	 * @return array|UserDataItem[]
+	 */
+	public function jsonSerialize()
+	{
+		return $this->items();
+	}
+
     /**
      * Returns the user id.
      *
@@ -77,4 +87,5 @@ private function createDataItems(array $data): array
 
         return $items;
     }
+
 }
diff --git a/src/UserDataItem.php b/src/UserDataItem.php
index 77936e9..32adb4f 100644
--- a/src/UserDataItem.php
+++ b/src/UserDataItem.php
@@ -2,7 +2,9 @@
 
 namespace Blockvis\Civic\Sip;
 
-class UserDataItem
+use JsonSerializable;
+
+class UserDataItem implements JsonSerializable
 {
     /**
      * Civic SIP service challenges the user during scope request approval to ensure
@@ -71,6 +73,19 @@ public function isValid(): bool
         return $this->isValid;
     }
 
+	/**
+	 * @return array
+	 */
+	public function jsonSerialize()
+	{
+		return [
+			'label' => $this->label,
+			'value' => $this->value,
+			'isValid' => $this->isValid,
+			'isOwner' => $this->isOwner,
+		];
+	}
+
     /**
      * Returns the item label.
      *