diff --git a/api/answer.php b/api/answer.php
new file mode 100644
index 0000000..e54097d
--- /dev/null
+++ b/api/answer.php
@@ -0,0 +1,42 @@
+<?php
+
+require_once '../includes/config.php';
+require_once '../includes/functions.php';
+require_once '../includes/jsondb.php';
+require_once '../includes/srs.php';
+
+requireLogin();
+
+$user = $_SESSION['user'];
+
+$input = json_decode(file_get_contents('php://input'), true);
+
+$lang = $input['lang'];
+$list = $input['list'];
+$wordId = (int)$input['wordId'];
+$userAnswer = trim($input['answer']);
+
+$file = listPath($user, $lang, $list);
+
+$data = JsonDB::read($file);
+
+$correct = false;
+
+foreach ($data['words'] as &$word) {
+
+    if ($word['id'] === $wordId) {
+
+        $correct =
+            strtolower($word['answer']) === strtolower($userAnswer);
+
+        updateWordStats($word, $correct);
+
+        break;
+    }
+}
+
+JsonDB::write($file, $data);
+
+echo json_encode([
+    'correct' => $correct
+]);
\ No newline at end of file