Does SigNoz Accept Prometheus Format Metrics Directly?

[ashinde-ai]

I'm working on integrating Vector's host metrics with SigNoz and running into some challenges with the OTLP conversion process. Before I continue with complex workarounds, I wanted to ask:

Does SigNoz support ingesting metrics in Prometheus format directly?

My Current Setup:
Vector collecting host metrics (CPU, memory, disk, network, filesystem)
Vector can easily export these in Prometheus format via prometheus_exporter
SigNoz Cloud as the destination

Current Challenge:
Vector's host_metrics → OTLP conversion is complex and unreliable
Lua transforms are error-prone (NaN handling issues, single metric visibility)
OTEL Collector adds infrastructure overhead

Ideal Solution:
Vector (host_metrics) → Prometheus format → SigNoz (direct ingestion)

Questions:
Does SigNoz have a Prometheus ingestion endpoint? (like /api/v1/write for remote write)
Can SigNoz scrape Prometheus endpoints directly?
Is there a recommended approach for Prometheus → SigNoz integration?

Why This Matters:
Vector's Prometheus export is rock solid and battle-tested
Would eliminate complex OTLP conversion layers
Many users have existing Prometheus-format metrics

Current Vector Prometheus Output:
HELP host_cpu_seconds_total Host CPU time# TYPE host_cpu_seconds_total counterhost_cpu_seconds_total{cpu="0",host="server",mode="idle"} 1234567.89host_memory_total_bytes{host="server"} 8589934592# ... and 30+ other host metrics
If SigNoz supports Prometheus format, this would be a much cleaner integration path than the current OTLP conversion challenges.

Environment:
Vector 0.47.0
SigNoz Cloud
Linux host metrics

Thanks for any guidance! 🙏

[srikanthccv]

Does SigNoz have a Prometheus ingestion endpoint? (like /api/v1/write for remote write)

No

Can SigNoz scrape Prometheus endpoints directly?

No

Is there a recommended approach for Prometheus → SigNoz integration?

Using Prometheus receiver -> OTLP export https://signoz.io/docs/userguide/send-metrics/#enable-a-prometheus-receiver

Environment:
Vector 0.47.0
SigNoz Cloud
Linux host metrics

Why not https://signoz.io/docs/userguide/hostmetrics/?