NAIF FixGraph · API Health Check
API returns HTTP 503 Service Unavailable
The service path is reachable but currently unavailable to serve the request.
Aggregate badge appears at 5+ consented samplesProblem signature
SERVER_ERROR / HTTP 503
Likely causes
- Maintenance or overload protection
- No healthy upstream instances
- Dependency outage triggers service-unavailable mode
What to check first
- Check load, worker count and health checks
- Verify at least one upstream is healthy
- Inspect retry-after and dependency status
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.