diff --git a/validata_ui/config.py b/validata_ui/config.py
index 498cd1c74da4b6569412e25693fc12897a9fe038..aa68d602cb19b4208e711959cfe86447d0d9a8fa 100644
--- a/validata_ui/config.py
+++ b/validata_ui/config.py
@@ -26,7 +26,7 @@ SECRET_KEY = os.environ.get("SECRET_KEY") or None
 
 API_VALIDATE_ENDPOINT = os.environ.get("API_VALIDATE_ENDPOINT") or None
 if API_VALIDATE_ENDPOINT is None:
-    log.error("API_VALIDATE_ENDPOINT environment variable is not set, validation is not possible")
+    raise ValueError("API_VALIDATE_ENDPOINT environment variable required")
 
 SHIELDS_IO_BASE_URL = os.environ.get("SHIELDS_IO_BASE_URL") or None
 if SHIELDS_IO_BASE_URL and not SHIELDS_IO_BASE_URL.endswith('/'):
diff --git a/validata_ui/views.py b/validata_ui/views.py
index b9566d3f92917b176012403b9ed5550a8740d6d0..b40b5dbcbf49731c4c57d4d3412490c0ba1e38ca 100644
--- a/validata_ui/views.py
+++ b/validata_ui/views.py
@@ -314,10 +314,6 @@ def get_badge_url_and_message(badge):
 def validate(schema_instance: SchemaInstance, source: ValidataResource):
     """ Validate source and display report """
 
-    # Validation is done through http call to validata-api
-    if config.API_VALIDATE_ENDPOINT is None:
-        flash_error("No Validate endpoint defined :-(")
-        return redirect(url_for("custom_validator"))
     api_url = config.API_VALIDATE_ENDPOINT
 
     # Useful to receive response as JSON
@@ -519,11 +515,6 @@ def compute_validation_form_url(schema_instance: SchemaInstance):
 def custom_validator():
     """Validator form"""
 
-    # Check that validata-api URL is set
-    if config.API_VALIDATE_ENDPOINT is None:
-        flash_error("URL de connexion à l'API non indiquée :-(")
-        return redirect(url_for('home'))
-
     if request.method == 'GET':
 
         # input is a hidden form parameter to know