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

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.

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

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

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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.

const result = await stream.request('POST', '/transform',  data: payload ,  timeout: 5000 );

The SDK provides both callback-based and Promise-based APIs, so you can use it with callbacks, async/await, or Observables.