Client

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

The TypeScript types are fully inferred; no manual type assertions needed even with complex nested schemas.

await stream.on('user.created', async (event) =>  console.log(event.data.email); );

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

Client

Authentication tokens are rotated silently in the background; your code never handles credentials directly.

stream.on('*.created', async (event) =>  await db.insert('events', event); ,  concurrency: 50 );

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