diff --git a/pyjoin/__init__.py b/pyjoin/__init__.py
index 7434761..aab85b5 100644
--- a/pyjoin/__init__.py
+++ b/pyjoin/__init__.py
@@ -1,7 +1,8 @@
 """Python API for using Join by joaoapps."""
 import requests
 from flask import request, Response, Flask
-import os 
+import os
+import json
 
 SEND_URL = "https://joinjoaomgcd.appspot.com/_ah/api/messaging/v1/sendPush?apikey="
 LIST_URL = "https://joinjoaomgcd.appspot.com/_ah/api/registration/v1/listDevices?apikey="
@@ -74,8 +75,21 @@ def get_public_ip(self):
     
 def get_devices(api_key):
     response = requests.get(LIST_URL + api_key).json()
+
+    mypath = os.path.dirname(__file__)
+
     if response.get('success') and not response.get('userAuthError'):
+        js = json.dumps([(r['deviceName'], r['deviceId']) for r in response['records']])
+        with open(mypath+'/'+api_key+'.json', 'w')  as fh:
+          fh.write(js)
         return [(r['deviceName'], r['deviceId']) for r in response['records']]
+    else:
+
+      if os.path.isfile(mypath+'/'+api_key+'.json'):
+        with open(mypath+'/'+api_key+'.json', 'r') as file:
+          s = file.read()
+        o = json.loads(s)
+        return o
     return False
 
 def send_notification(api_key, text, device_id=None, device_ids=None, device_names=None, title=None, icon=None, smallicon=None, vibration=None, image=None, url=None, tts=None, tts_language=None, sound=None, notification_id=None, category=None, actions=None):