diff --git a/src/jgo/jgo.py b/src/jgo/jgo.py
index bd2b328..53f9b3f 100644
--- a/src/jgo/jgo.py
+++ b/src/jgo/jgo.py
@@ -271,7 +271,7 @@ def run_and_combine_outputs(command, *args):
 
 def find_endpoint(argv, shortcuts={}):
     # endpoint is first positional argument
-    pattern = re.compile("(.*https?://.*|[a-zA-Z]:\\.*)")
+    pattern = re.compile("(.*(https?|grpc)://.*|[a-zA-Z]:\\.*)")
     indices = []
     for index, arg in enumerate(argv):
         if arg in shortcuts or (Endpoint.is_endpoint(arg) and not pattern.match(arg)):