Erebus

Erebus is a real-time infrastructure platform built on Cloudflare Durable Objects. It gives you managed pub/sub channels with presence, message history, and at-least-once delivery — so you can add real-time features without running your own WebSocket servers or message brokers.

What you get

• Pub/Sub Channels — publish and subscribe to topics with ULID-ordered message delivery.
• Presence — automatic join/leave events for every subscriber in a channel.
• Message History — cursor-based pagination to fetch past messages.
• Acknowledgments — MQTT-style QoS 1 for at-least-once delivery.

Quick example

import { ErebusClient, ErebusClientState } from "@erebus-sh/sdk/client";

const client = ErebusClient.createClient({
  client: ErebusClientState.PubSub,
  authBaseUrl: "https://your-auth-server.com",
});

client.joinChannel("my-app");
await client.connect();

await client.subscribe("chat", (msg) => {
  console.log(msg.senderId, msg.payload);
});

await client.publish("chat", "hello world");

Documentation