diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd0e6ae..5d61098 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## 2.1.3 under development
 
-- New #107: Add `DataStream` (@vjik)
+- New #107, #110: Add `DataStream` (@vjik)
 - New #107: Add `FormatterInterface` and implementations: `HtmlFormatter`, `JsonFormatter`, `PlainTextFormatter`,
   `XmlFormatter` (@vjik)
 - New #107: Add `DataResponseFactoryInterface` and implementations: `DataResponseFactory`, `FormattedResponseFactory`,
diff --git a/src/DataStream/DataStream.php b/src/DataStream/DataStream.php
index 68d3944..5833f93 100644
--- a/src/DataStream/DataStream.php
+++ b/src/DataStream/DataStream.php
@@ -46,6 +46,16 @@ public function hasFormatter(): bool
         return $this->formatter !== null;
     }
 
+    /**
+     * Returns the formatter.
+     *
+     * @return FormatterInterface|null The formatter or `null` if not set.
+     */
+    public function getFormatter(): ?FormatterInterface
+    {
+        return $this->formatter;
+    }
+
     /**
      * Changes the formatter.
      *
@@ -57,6 +67,16 @@ public function changeFormatter(FormatterInterface $formatter): void
         $this->resetState();
     }
 
+    /**
+     * Returns the raw data.
+     *
+     * @return mixed The raw data.
+     */
+    public function getData(): mixed
+    {
+        return $this->data;
+    }
+
     /**
      * Changes the data.
      *
diff --git a/tests/DataStream/DataStreamTest.php b/tests/DataStream/DataStreamTest.php
index e4eb997..483394d 100644
--- a/tests/DataStream/DataStreamTest.php
+++ b/tests/DataStream/DataStreamTest.php
@@ -24,6 +24,8 @@ public function testBase(): void
         $stream = new DataStream('test data');
 
         $this->assertFalse($stream->hasFormatter());
+        $this->assertNull($stream->getFormatter());
+        $this->assertSame('test data', $stream->getData());
     }
 
     public function testGetFormattedWithoutFormatter(): void
@@ -37,9 +39,11 @@ public function testGetFormattedWithoutFormatter(): void
 
     public function testFormatter(): void
     {
-        $stream = new DataStream('test', new JsonFormatter());
+        $formatter = new JsonFormatter();
+        $stream = new DataStream('test', $formatter);
 
         $this->assertTrue($stream->hasFormatter());
+        $this->assertSame($formatter, $stream->getFormatter());
         $this->assertSame('"test"', (string) $stream);
     }
 
@@ -51,6 +55,7 @@ public function testChangeFormatter(): void
         $stream->changeFormatter($formatter);
 
         $this->assertTrue($stream->hasFormatter());
+        $this->assertSame($formatter, $stream->getFormatter());
         $this->assertSame('"test"', (string) $stream);
     }
 
@@ -73,6 +78,7 @@ public function testChangeData(): void
         $stream->changeData('world');
 
         $this->assertSame('world', (string) $stream);
+        $this->assertSame('world', $stream->getData());
     }
 
     public function testCloseStreamOnChangeData(): void