Quickstart

Install the recorder

The recorder is a library, not an agent. It writes the events your service already emits to Fenwright as they happen. Nothing is proxied and no traffic changes path.

npm install @fenwright/recorder

Name the service

One call at start-up. The key is scoped to one service, so a leaked key cannot read another team’s hours.

import { record } from '@fenwright/recorder';

record({
  service: 'checkout-api',
  key: process.env.FENWRIGHT_KEY,
  // Dropped inside your process, never sent.
  redact: ['card.pan', 'customer.email'],
});

Replay the first hour

The first window is replayable as soon as it closes. Open it in the app, or pull it to your laptop:

fenwright replay checkout-api --window 02:00-03:00 --tz UTC
fenwright diff checkout-api --window 02:00-03:00 --against last-tuesday

If installation does not go cleanly, write to support. It is answered by the people who wrote the recorder.