---
title: API client HTTP 4xx errors
description: The API gateway could return 4xx errors to API clients in these situations:
component: pingauthorize
version: 10.1
page_id: pingauthorize:pingauthorize_integrations:paz_kong_4xx_errors
canonical_url: https://docs.pingidentity.com/pingauthorize/10.1/pingauthorize_integrations/paz_kong_4xx_errors.html
revdate: August 14, 2023
---

# API client HTTP 4xx errors

The API gateway could return 4xx errors to API clients in these situations:

* PingAuthorize cannot match an API client's request to any of the base paths configured for a sideband API endpoint.

* The API client's request cannot be authenticated for a sideband API endpoint.

|   |                                                                                                                             |
| - | --------------------------------------------------------------------------------------------------------------------------- |
|   | For more information, see [Policy decision data](../pingauthorize_server_administration_guide/paz_capture_debug_data.html). |