diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..d76e017
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,2 @@
+FUNCTIONS_ENDPOINT_URL=  #firebase functions url (Firebase emulator or production Cloud Run URL)
+USE_EMULATORS=true  #true if running locally
diff --git a/app/main.py b/app/main.py
index 0635c72..62dc885 100644
--- a/app/main.py
+++ b/app/main.py
@@ -3,7 +3,8 @@
 
 # Local imports from app
 from app.routes import session as session_route
-
+from dotenv import load_dotenv
+load_dotenv()
 
 # Initialize Flask app and enable CORS
 app = Flask(__name__)
diff --git a/app/routes/session.py b/app/routes/session.py
index 1db1859..fb65629 100644
--- a/app/routes/session.py
+++ b/app/routes/session.py
@@ -133,12 +133,16 @@ def calib_results():
                 "screen_width": screen_width,
                 "k": k
             }
+            
+            USE_EMULATORS=os.getenv('USE_EMULATORS')
+            FUNCTIONS_ENDPOINT_URL = os.getenv('FUNCTIONS_ENDPOINT_URL')
 
-            RUXAILAB_WEBHOOK_URL = "https://receivecalibration-ffptzpxikq-uc.a.run.app"
+            if USE_EMULATORS:
+                FUNCTIONS_ENDPOINT_URL+='/receiveCalibration'    
 
             print("file_name:", file_name)
 
-            resp = requests.post(RUXAILAB_WEBHOOK_URL, json=payload)
+            resp = requests.post(FUNCTIONS_ENDPOINT_URL, json=payload)
             print("Enviado para RuxaiLab:", resp.status_code, resp.text)
         except Exception as e:
             print("Erro ao enviar para RuxaiLab:", e)
diff --git a/requirements.txt b/requirements.txt
index 69429c3..22c1ee5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,3 +18,4 @@ tzdata==2025.2
 Werkzeug==3.1.3
 gunicorn==23.0.0
 requests==2.31.0
+dotenv==0.9.9