NAIF FixGraph · API Health Check

API returns HTTP 502 Bad Gateway

A proxy or gateway reached the request path but could not obtain a valid upstream response.

Aggregate badge appears at 5+ consented samples

Problem signature

SERVER_ERROR / HTTP 502

Likely causes

Origin process is unavailable
Reverse proxy points to the wrong upstream
Origin closes the connection or returns an invalid response

What to check first

Check the origin directly from the proxy host
Verify upstream address, port and protocol
Compare proxy logs with origin process health

Test yours freeGet the bounded fix · from 69 USDC

This page is curated technical guidance, not a claim about any specific user's system. Diagnosis-derived trend badges are shown only after at least 5 consented, sanitized samples.