Auth

Graceful shutdown waits for in-flight events to complete, then closes connections cleanly—no lost events, no crashes.

Metrics are published to standard formats (Prometheus, CloudWatch, DataDog) with zero configuration.

const client = new querykit.Client( auth: 'Bearer token', retry: true, timeout: 30000 );

Error handling is explicit: catch failures at any stage, log them, and route bad events to a dead-letter queue without stopping the main pipeline.

Auth

Each event flows through a series of transformation stages, with built-in support for filtering, mapping, and conditional routing.

stream.pipe(map(e => e.data), buffer(100, 5000), flatMap(batch => fetch('/api/bulk',  body: JSON.stringify(batch) ))).catch(console.error);

The core querykit object is a lightweight wrapper that manages the lifecycle of your event stream.