4casters Streaming API - 4casters API

The 4casters streaming API delivers real-time user and market updates over a raw WebSocket connection.

Endpoints

User feed: wss://streaming-api.4casters.io/v2/user
Price feed: wss://streaming-api.4casters.io/price-stream

The price feed broadcasts all market updates by default. Clients can optionally narrow the stream to specific games, leagues, or sports — see Subscriptions.

Auth

Both feeds authenticate with a 4Casters token. Send the token in the Authorization header on the WebSocket handshake. The server derives the user from the token — no username in the URL.

Get a token

There is no separate API key. Log in with your 4Casters username and password by calling the /user/login endpoint of the 4Casters REST API. The response includes a token you can use here. See Authentication for token lifetime and rotation. See POST /user/login in the 4Casters REST API docs.

Connect

const WebSocket = require('ws');
const token = process.env.FOURCASTERS_TOKEN;
const ws = new WebSocket('wss://streaming-api.4casters.io/v2/user', {
  headers: { Authorization: token },
});