diff --git a/portainer_stacks_server.py b/portainer_stacks_server.py
index 9089955..917819d 100755
--- a/portainer_stacks_server.py
+++ b/portainer_stacks_server.py
@@ -568,29 +568,30 @@ async def handle_call_tool(
         elif name == "create_compose_stack_from_git":
             env_id = arguments["environment_id"]
             
-            # Build request data
+            # Build request data with lowercase field names for this endpoint
             data = {
-                "Name": arguments["name"],
-                "EndpointId": int(env_id),
-                "GitConfig": {
-                    "URL": arguments["repository_url"],
-                    "ReferenceName": arguments.get("repository_ref", "main"),
-                    "ComposeFilePathInRepository": arguments.get("compose_path", "docker-compose.yml")
-                }
+                "name": arguments["name"],
+                "repositoryURL": arguments["repository_url"],
+                "repositoryReferenceName": arguments.get("repository_ref", "main"),
+                "composeFilePathInRepository": arguments.get("compose_path", "docker-compose.yml")
             }
             
             # Add authentication if provided
             if arguments.get("repository_auth") and arguments.get("repository_username"):
-                data["GitConfig"]["Authentication"] = {
-                    "Username": arguments["repository_username"],
-                    "Password": arguments.get("repository_password", "")
-                }
+                data["repositoryAuthentication"] = True
+                data["repositoryUsername"] = arguments["repository_username"]
+                data["repositoryPassword"] = arguments.get("repository_password", "")
+            else:
+                data["repositoryAuthentication"] = False
             
             # Add environment variables if provided
             if arguments.get("env_vars"):
-                data["Env"] = arguments["env_vars"]
+                data["env"] = arguments["env_vars"]
             
-            result = await make_request("POST", "/api/stacks", json_data=data)
+            # Use the correct endpoint for standalone Docker stack creation from Git
+            endpoint = f"/api/stacks/create/standalone/repository?endpointId={env_id}"
+            
+            result = await make_request("POST", endpoint, json_data=data)
             
             if "error" in result:
                 return [types.TextContent(type="text", text=f"Error: {result['error']}")]