diff --git a/polyapi/config.py b/polyapi/config.py
index e1122b7..19016f5 100644
--- a/polyapi/config.py
+++ b/polyapi/config.py
@@ -3,6 +3,8 @@
 import configparser
 from typing import Tuple
 
+from polyapi.utils import is_valid_polyapi_url, is_valid_uuid, print_green, print_yellow
+
 # cached values
 API_KEY = None
 API_URL = None
@@ -60,14 +62,29 @@ def initialize_config(force=False):
     if force or (not key or not url):
         url = url or "https://na1.polyapi.io"
         print("Please setup your connection to PolyAPI.")
-        url = input(f"? Poly API Base URL ({url}): ") or url
-        key = input(f"? Poly App Key or User Key ({key}): " if key else "? Poly App Key or User Key: ") or key
+        url = input(f"? Poly API Base URL ({url}): ").strip() or url
+
+        if not key:
+            key = input("? Poly App Key or User Key: ").strip()
+        else:
+            key_input = input(f"? Poly App Key or User Key ({key}): ").strip()
+            key = key_input if key_input else key
 
         if url and key:
+            errors = []
+            if not is_valid_polyapi_url(url):
+                errors.append(f"{url} is not a valid Poly API Base URL")
+            if not is_valid_uuid(key):
+                errors.append(f"{key} is not a valid Poly App Key or User Key")
+            if errors:
+                print_yellow("\n".join(errors))
+                sys.exit(1)
+
             set_api_key_and_url(key, url)
+            print_green(f"Poly setup complete.")
 
     if not key or not url:
-        print("Poly API Key and Poly API Base URL are required.")
+        print_yellow("Poly API Key and Poly API Base URL are required.")
         sys.exit(1)
 
     return key, url
diff --git a/polyapi/utils.py b/polyapi/utils.py
index 259e727..a5141a6 100644
--- a/polyapi/utils.py
+++ b/polyapi/utils.py
@@ -1,6 +1,7 @@
 import keyword
 import re
 import os
+import uuid
 from typing import Tuple, List
 from colorama import Fore, Style
 from polyapi.constants import BASIC_PYTHON_TYPES
@@ -208,4 +209,23 @@ def rewrite_reserved(s: str) -> str:
 
 
 def rewrite_arg_name(s: str):
-    return rewrite_reserved(camelCase(s))
\ No newline at end of file
+    return rewrite_reserved(camelCase(s))
+
+
+valid_subdomains = ["na[1-2]", "eu[1-2]", "dev"]
+
+
+def is_valid_polyapi_url(_url: str):
+    # Join the subdomains into a pattern
+    subdomain_pattern = "|".join(valid_subdomains)
+    pattern = rf"^https://({subdomain_pattern})\.polyapi\.io$"
+    return re.match(pattern, _url) is not None
+
+
+def is_valid_uuid(uuid_string, version=4):
+    try:
+        uuid_obj = uuid.UUID(uuid_string, version=version)
+    except ValueError:
+        return False
+
+    return str(uuid_obj) == uuid_string