diff --git a/api/chatbot_check_limit.php b/api/chatbot_check_limit.php
new file mode 100644
index 0000000..e57291f
--- /dev/null
+++ b/api/chatbot_check_limit.php
@@ -0,0 +1,36 @@
+<?php
+require_once __DIR__ . '/../config/config.php';
+require_once __DIR__ . '/../config/database.php';
+
+header('Content-Type: application/json');
+
+if (!isLoggedIn() || !isEleve()) {
+    echo json_encode(['error' => 'Non autorisé']);
+    exit;
+}
+
+$id_tentative = filter_input(INPUT_POST, 'id_tentative', FILTER_VALIDATE_INT);
+$id_question = filter_input(INPUT_POST, 'id_question', FILTER_VALIDATE_INT);
+
+if (!$id_tentative || !$id_question) {
+    echo json_encode(['error' => 'Données manquantes']);
+    exit;
+}
+
+$db = Database::getInstance();
+
+// Vérifier limite
+$usage = $db->fetchOne(
+    "SELECT messages_count FROM chat_usage_limits 
+     WHERE id_tentative = ? AND id_question = ?",
+    [$id_tentative, $id_question]
+);
+
+$messages_count = $usage['messages_count'] ?? 0;
+$remaining = max(0, 3 - $messages_count);
+
+echo json_encode([
+    'success' => true,
+    'remaining' => $remaining,
+    'used' => $messages_count
+]);
\ No newline at end of file