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metricsServer

Start a Prometheus metrics server so Pipe UI and other tools can scrape pipeline metrics. 
import { metricsServer } from "@subsquid/pipes/metrics/node";
import { evmPortalSource } from "@subsquid/pipes/evm";

const source = evmPortalSource({
  portal: "https://portal.sqd.dev/datasets/ethereum-mainnet",
  metrics: metricsServer({ port: 9090 }),
});
Parameters:
  • port: HTTP port for the metrics endpoint (default: 9090)
Metrics are available at http://localhost:9090/metrics. When profilers are enabled on decoders or transformers, their metrics are automatically exposed. You can also add custom metrics via ctx.metrics in your pipeline.
Use with Pipe UI for a visual dashboard.