diff --git a/scripts/signup.py b/scripts/signup.py
index 028eb2367..755304e5c 100644
--- a/scripts/signup.py
+++ b/scripts/signup.py
@@ -1,10 +1,14 @@
 import argparse
-from constants import URL, DB_NAME, MOUNT
 import requests
+import sys
+from urllib.parse import urljoin
+
 from auth_tools import get_headers, create_credentials_file
+from constants import URL
+
 
-def signup(user, password, email):
-    url = URL + f"/user/signup"
+def signup(user, password, email, url):
+    url = urljoin(url, "/user/signup")
     body = {
         "user": user,
         "passwd": password,
@@ -21,7 +25,7 @@ def signup(user, password, email):
 
 def register_producer(description, url, logo, eth_address):
     headers = get_headers(None)
-    url = URL + "/producer"
+    url = urljoin(url, "/producer")
     body = {"description": description}
     if url is not None:
         body["url"] = url
@@ -29,32 +33,46 @@ def register_producer(description, url, logo, eth_address):
         body["logo"] = logo
     if eth_address is not None:
         body["eth_address"] = eth_address
+
     response = requests.post(url, json=body, headers=headers)
     if response.status_code != 200:
         print(f"Error: {response.status_code} {response.text}")
-    else:
-        print(response.text)
+        return False
+
+    print(response.text)
+    return True
 
 
-def signup_parser(args):
-    response = signup(args.user, args.password, args.email)
+def signup_parser(args) -> bool:
+    response = signup(args.user, args.password, args.email, args.url)
     if response.status_code == 200:
         create_credentials_file("secret", args.password)
         create_credentials_file("user", args.user)
 
+    return response.status_code in [200]
 
-def register_producer_parser(args):
-    register_producer(args.description, args.url, args.logo, args.eth_address)
 
+def register_producer_parser(args) -> bool:
+    return register_producer(
+        args.description, args.url, args.logo, args.eth_address,
+    )
 
-if __name__ == "__main__":
+
+def main():
     parser = argparse.ArgumentParser()
+    parent_parser = argparse.ArgumentParser(add_help=False)
+    parent_parser.add_argument(
+        "--url", action="store", default=URL, help="url of a producer"
+    )
+
     subparsers = parser.add_subparsers(help="sub-command help")
-    parser_user = subparsers.add_parser("user", help="user signup")
+
+    parser_user = subparsers.add_parser(
+        "user", help="user signup", parents=[parent_parser]
+    )
     parser_user.set_defaults(func=signup_parser)
-    parser_producer = subparsers.add_parser("producer", help="producer signup")
-    parser_producer.set_defaults(func=register_producer_parser)
 
+    parser_producer = subparsers.add_parser("producer", help="producer signup", parents=[parent_parser])
     parser_user.add_argument(
         "-u", "--user", action="store", required=True, help="user name"
     )
@@ -71,15 +89,22 @@ def register_producer_parser(args):
         default="Generic Producer",
         help="description of a producer",
     )
-    parser_producer.add_argument(
-        "-u", "--url", action="store", default=None, help="url of a producer"
-    )
     parser_producer.add_argument(
         "-l", "--logo", action="store", default=None, help="logo of a producer"
     )
     parser_producer.add_argument(
         "-e", "--eth_address", action="store", default=None, help="eth address"
     )
+    parser_producer.set_defaults(func=register_producer_parser)
+
     args = parser.parse_args()
+    if hasattr(args, 'func'):
+        # valid submodules
+        sys.exit(0 if args.func(args) else 1)
+
+    parser.print_help()
+    sys.exit(1)
 
-    args.func(args)
+
+if __name__ == "__main__":
+    main()