diff --git a/bin/packages/Import_helper.py b/bin/packages/Import_helper.py
index 3ce4406f..0b7fdfb8 100755
--- a/bin/packages/Import_helper.py
+++ b/bin/packages/Import_helper.py
@@ -49,7 +49,7 @@ def check_import_status(UUID):
 
     processing = r_serv_log_submit.get(UUID + ':processing')
     if not processing:
-        return ({'status': 'error', 'reason': 'Unknow uuid'}, 400)
+        return ({'status': 'error', 'reason': 'Unknown uuid'}, 400)
 
     # nb_total = r_serv_log_submit.get(UUID + ':nb_total')
     # nb_sucess = r_serv_log_submit.get(UUID + ':nb_sucess')
diff --git a/var/www/Flask_server.py b/var/www/Flask_server.py
index 5f8d52b2..c4d3c3c9 100755
--- a/var/www/Flask_server.py
+++ b/var/www/Flask_server.py
@@ -5,6 +5,7 @@ import os
 import re
 import sys
 import ssl
+import json
 import time
 
 import redis
@@ -13,7 +14,7 @@ import logging
 import logging.handlers
 import configparser
 
-from flask import Flask, render_template, jsonify, request, Request, session, redirect, url_for
+from flask import Flask, render_template, jsonify, request, Request, Response, session, redirect, url_for
 from flask_login import LoginManager, current_user, login_user, logout_user, login_required
 
 import bcrypt
@@ -291,7 +292,21 @@ def searchbox():
 
 # ========== ERROR HANDLER ============
 
+@app.errorhandler(405)
+def _handle_client_error(e):
+    if request.path.startswith('/api/'):
+        return Response(json.dumps({"status": "error", "reason": "Method Not Allowed: The method is not allowed for the requested URL"}, indent=2, sort_keys=True), mimetype='application/json'), 405
+    else:
+        return e
+
 @app.errorhandler(404)
+def error_page_not_found(e):
+    if request.path.startswith('/api/'):
+        return Response(json.dumps({"status": "error", "reason": "404 Not Found"}, indent=2, sort_keys=True), mimetype='application/json'), 404
+    else:
+        # avoid endpoint enumeration
+        return page_not_found(e)
+
 @login_required
 def page_not_found(e):
     # avoid endpoint enumeration
diff --git a/var/www/modules/restApi/Flask_restApi.py b/var/www/modules/restApi/Flask_restApi.py
index 727cd524..673b83c6 100644
--- a/var/www/modules/restApi/Flask_restApi.py
+++ b/var/www/modules/restApi/Flask_restApi.py
@@ -627,7 +627,7 @@ def import_item_uuid(UUID):
             HTTP Status Code: 400
 
             {'status': 'error', 'reason': 'Invalid uuid'}
-            {'status': 'error', 'reason': 'Unknow uuid'}
+            {'status': 'error', 'reason': 'Unknown uuid'}
 
     """