diff --git a/kinde_fastapi/framework/fastapi_framework.py b/kinde_fastapi/framework/fastapi_framework.py
index 8dfe0668..d9837ae3 100644
--- a/kinde_fastapi/framework/fastapi_framework.py
+++ b/kinde_fastapi/framework/fastapi_framework.py
@@ -131,7 +131,15 @@ async def get_current_user():
         @self.app.get("/login")
         async def login(request: Request):
             """Redirect to Kinde login page."""
-            url=await self._oauth.login()
+            # Build login options from query parameters
+            login_options = {}
+            
+            # Check for invitation_code in query parameters
+            invitation_code = request.query_params.get('invitation_code')
+            if invitation_code:
+                login_options['invitation_code'] = invitation_code
+            
+            url = await self._oauth.login(login_options)
             self._logger.warning(f"[Login] Session is: {request.session}")
             return RedirectResponse(url=url)
         
diff --git a/kinde_flask/framework/flask_framework.py b/kinde_flask/framework/flask_framework.py
index 2b2b9246..a0ce4cdb 100644
--- a/kinde_flask/framework/flask_framework.py
+++ b/kinde_flask/framework/flask_framework.py
@@ -127,7 +127,16 @@ def _register_kinde_routes(self) -> None:
         def login():
             """Redirect to Kinde login page."""
             loop = asyncio.get_event_loop()
-            login_url = loop.run_until_complete(self._oauth.login())
+            
+            # Build login options from query parameters
+            login_options = {}
+            
+            # Check for invitation_code in query parameters
+            invitation_code = request.args.get('invitation_code')
+            if invitation_code:
+                login_options['invitation_code'] = invitation_code
+            
+            login_url = loop.run_until_complete(self._oauth.login(login_options))
             return redirect(login_url)
 
         # Callback route
diff --git a/kinde_sdk/auth/login_options.py b/kinde_sdk/auth/login_options.py
index 7ca43da4..3c87ec06 100644
--- a/kinde_sdk/auth/login_options.py
+++ b/kinde_sdk/auth/login_options.py
@@ -27,6 +27,10 @@ class LoginOptions:
     PLAN_INTEREST = "plan_interest"
     PRICING_TABLE_KEY = "pricing_table_key"
     
+    # Invitation parameters
+    INVITATION_CODE = "invitation_code"
+    IS_INVITATION = "is_invitation"
+    
     # Additional parameters container
     AUTH_PARAMS = "auth_params"
     SUPPORT_RE_AUTH = "supports_reauth"
\ No newline at end of file
diff --git a/kinde_sdk/auth/oauth.py b/kinde_sdk/auth/oauth.py
index 1c22eb99..174a438b 100644
--- a/kinde_sdk/auth/oauth.py
+++ b/kinde_sdk/auth/oauth.py
@@ -280,6 +280,9 @@ async def generate_auth_url(
             # Registration params
             LoginOptions.PLAN_INTEREST: "plan_interest",
             LoginOptions.PRICING_TABLE_KEY: "pricing_table_key",
+            # Invitation params
+            LoginOptions.INVITATION_CODE: "invitation_code",
+            LoginOptions.IS_INVITATION: "is_invitation",
             # Re-authentication support
             LoginOptions.SUPPORT_RE_AUTH: "supports_reauth",
         }
@@ -307,10 +310,19 @@ async def generate_auth_url(
                 # Handle boolean parameters
                 if option_key == LoginOptions.IS_CREATE_ORG or option_key == LoginOptions.HAS_SUCCESS_PAGE:
                     search_params[param_key] = "true" if login_options[option_key] else "false"
+                elif option_key == LoginOptions.IS_INVITATION:
+                    # Only add is_invitation if it's truthy
+                    if login_options[option_key]:
+                        search_params[param_key] = "true"
                 else:
                     # Use string representation for query params
                     search_params[param_key] = str(login_options[option_key])
         
+        # Handle invitation code: automatically set is_invitation to "true" when invitation_code is present
+        if LoginOptions.INVITATION_CODE in login_options and login_options[LoginOptions.INVITATION_CODE]:
+            if LoginOptions.IS_INVITATION not in login_options or not login_options[LoginOptions.IS_INVITATION]:
+                search_params["is_invitation"] = "true"
+        
         # Add additional auth parameters
         if LoginOptions.AUTH_PARAMS in login_options and isinstance(login_options[LoginOptions.AUTH_PARAMS], dict):
             for key, value in login_options[LoginOptions.AUTH_PARAMS].items():