diff --git a/src/Schema/JsonDocument.php b/src/Schema/JsonDocument.php
index f4b491f..fd5ad93 100644
--- a/src/Schema/JsonDocument.php
+++ b/src/Schema/JsonDocument.php
@@ -9,6 +9,8 @@
 
 class JsonDocument {
 	private bool $hasError = false;
+	/** @var callable */
+	private $errorCallback;
 
 	public function __construct(
 		private ?JsonObject $jsonObject = null,
@@ -77,6 +79,13 @@ public function error(
 		}
 
 		$this->hasError = true;
+		if(isset($this->errorCallback)) {
+			call_user_func($this->errorCallback, $message, $context);
+		}
+	}
+
+	public function setErrorCallback(callable $callback):void {
+		$this->errorCallback = $callback;
 	}
 
 	/**
diff --git a/test/phpunit/Schema/JsonDocumentTest.php b/test/phpunit/Schema/JsonDocumentTest.php
index ecc7be5..9ad57f4 100644
--- a/test/phpunit/Schema/JsonDocumentTest.php
+++ b/test/phpunit/Schema/JsonDocumentTest.php
@@ -163,4 +163,33 @@ public function testError_disallowsSetAfterError():void {
 		$sut->error("This is an error");
 		$sut->set("one", "example");
 	}
+
+	public function testSetErrorCallback():void {
+		$calls = [];
+		$callback = function(string $message, ?array $context = null)use(&$calls):void {
+			array_push($calls, [$message, $context]);
+		};
+
+		$sut = new JsonDocument();
+		$sut->setErrorCallback($callback);
+
+		$sut->error("Test");
+		self::assertCount(1, $calls);
+		self::assertSame("Test", $calls[0][0]);
+		self::assertNull($calls[0][1]);
+	}
+
+	public function testSetErrorCallback_context():void {
+		$calls = [];
+		$callback = function(string $message, ?array $context = null)use(&$calls):void {
+			array_push($calls, [$message, $context]);
+		};
+
+		$sut = new JsonDocument();
+		$sut->setErrorCallback($callback);
+
+		$sut->error("Test", ["example" => "message"]);
+		self::assertCount(1, $calls);
+		self::assertSame(["example" => "message"], $calls[0][1]);
+	}
 }