---
set: 5
code: 502
title: Bad Gateway
references:
    "Rails HTTP Status Symbol": ":bad_gateway"
    "Go HTTP Status Constant": "http.StatusBadGateway"
    "Symfony HTTP Status Constant": "Response::HTTP_BAD_GATEWAY"
    "Python2 HTTP Status Constant": "httplib.BAD_GATEWAY"
    "Python3+ HTTP Status Constant": "http.client.BAD_GATEWAY"
    "Python3.5+ HTTP Status Constant": "http.HTTPStatus.BAD_GATEWAY"
---

The server, while acting as a gateway or proxy, received an invalid response from an inbound server it accessed while attempting to fulfill the request.

---

* Source: [RFC7231 Section 6.6.3][1]

[1]: <http://tools.ietf.org/html/rfc7231#section-6.6.3>