diff --git a/src/business_logic/formation/exceptions.py b/src/business_logic/formation/exceptions.py
new file mode 100644
index 0000000..21827dc
--- /dev/null
+++ b/src/business_logic/formation/exceptions.py
@@ -0,0 +1,6 @@
+class NoOnisepAPIException(Exception):
+    """
+    Raised when we cannot communicate wit Onisep API
+    """
+
+    pass
diff --git a/src/business_logic/formation/scrap/utils/get_onisep_data.py b/src/business_logic/formation/scrap/utils/get_onisep_data.py
index 12b391d..7f2ffe3 100644
--- a/src/business_logic/formation/scrap/utils/get_onisep_data.py
+++ b/src/business_logic/formation/scrap/utils/get_onisep_data.py
@@ -2,6 +2,7 @@
 # https://opendata.onisep.fr/data/5fa591127f501/2-ideo-formations-initiales-en-france.htm
 import requests
 from src.business_logic.formation import HEADERS, ONISEP_URL
+from src.business_logic.formation.exceptions import NoOnisepAPIException
 
 
 DATASET = "5fa591127f501"
@@ -12,4 +13,6 @@ def get_onisep_data(params: str) -> dict:
     response = requests.get(url, headers=HEADERS)
     if response.status_code == 200:
         return response.json()
-    raise Exception("Onisep API is down.", response.status_code)
+    raise NoOnisepAPIException(
+        f"status: {response.status_code} \n message : Onisep API is down.  \n dataset : {DATASET} \n headers : {HEADERS} "
+    )