diff --git a/config/database.js b/config/database.js
index f5749d9..e1d55f6 100644
--- a/config/database.js
+++ b/config/database.js
@@ -123,11 +123,22 @@ async function initDatabase() {
         archived BOOLEAN DEFAULT FALSE,
         archived_at TIMESTAMP,
         priority INTEGER DEFAULT 0,
+        created_via VARCHAR(20) DEFAULT 'web',
         created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
         updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
       )
     `);
 
+    // Migration: ajouter la colonne created_via si elle n'existe pas
+    await client.query(`
+      DO $$
+      BEGIN
+        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'notes' AND column_name = 'created_via') THEN
+          ALTER TABLE notes ADD COLUMN created_via VARCHAR(20) DEFAULT 'web';
+        END IF;
+      END $$;
+    `);
+
     // Table note_todos
     await client.query(`
       CREATE TABLE IF NOT EXISTS note_todos (
diff --git a/routes/notes.routes.js b/routes/notes.routes.js
index f24a084..b5cfd33 100644
--- a/routes/notes.routes.js
+++ b/routes/notes.routes.js
@@ -74,7 +74,7 @@ router.get('/', async (req, res) => {
     const notes = await getAll(`
       SELECT
         n.id, n.title, n.content, n.image_filename, n.archived, n.priority,
-        n.created_at, n.updated_at,
+        n.created_via, n.created_at, n.updated_at,
         (SELECT COUNT(*) FROM note_todos WHERE note_id = n.id) as todos_count,
         (SELECT COUNT(*) FROM note_todos WHERE note_id = n.id AND completed = TRUE) as todos_completed
       FROM notes n
@@ -242,10 +242,10 @@ router.post('/full',
 
       logger.info(`[CREATE NOTE FULL] Début création - user_id: ${req.user.id}, title: "${title}", todos: ${todos.length}, tags: ${tags.length}`);
 
-      // 1. Créer la note
+      // 1. Créer la note (marquée comme créée via API)
       const noteResult = await runQuery(`
-        INSERT INTO notes (user_id, title, content)
-        VALUES ($1, $2, $3)
+        INSERT INTO notes (user_id, title, content, created_via)
+        VALUES ($1, $2, $3, 'api')
         RETURNING *
       `, [req.user.id, title, content || '']);
 
@@ -325,6 +325,7 @@ router.post('/full',
         image_filename: null,
         archived: false,
         priority: 0,
+        created_via: 'api',
         todos: createdTodos,
         tags: createdTags,
         images: [],
diff --git a/src/pages/Index.tsx b/src/pages/Index.tsx
index 4152632..dd7c2d2 100644
--- a/src/pages/Index.tsx
+++ b/src/pages/Index.tsx
@@ -1397,7 +1397,7 @@ const Index = () => {
                         paginatedNotes.map(note => (
                           <Card
                             key={note.id}
-                            className="cursor-pointer hover:shadow-md transition-all group relative"
+                            className={`cursor-pointer hover:shadow-md transition-all group relative ${note.created_via === 'api' ? 'bg-red-50 dark:bg-red-950/30 border-red-200 dark:border-red-900' : ''}`}
                             onClick={() => handleOpenNote(note)}
                           >
                             <CardContent className="p-4">
@@ -1451,6 +1451,12 @@ const Index = () => {
                                 {note.content ? cleanHtmlContent(note.content) : "Note vide"}
                               </p>
                               <div className="flex gap-2 flex-wrap mb-2">
+                                {note.created_via === 'api' && (
+                                  <Badge className="bg-red-100 text-red-700 dark:bg-red-900/50 dark:text-red-300 text-xs">
+                                    <Zap className="h-3 w-3 mr-1" />
+                                    API
+                                  </Badge>
+                                )}
                                 {note.todos && note.todos.length > 0 && (
                                   <Badge variant="secondary">
                                     <CheckSquare className="h-3 w-3 mr-1" />
diff --git a/src/services/NotesService.ts b/src/services/NotesService.ts
index df8830e..6f2c7f6 100644
--- a/src/services/NotesService.ts
+++ b/src/services/NotesService.ts
@@ -29,6 +29,7 @@ export interface Note {
   title: string;
   content: string;
   archived?: boolean;
+  created_via?: 'web' | 'api';
   created_at?: string;
   updated_at?: string;
   todos: Todo[];