WebSocket Protocol

Ondo’s native WebSocket endpoint and how the SDK discovers it

Ondo exposes a native WebSocket endpoint at wss://api.ondoperps.xyz/ws. The SDK discovers this URL from the wsUrl field in the GET /providers response. If you’re using the SDK, subscribe through Streaming rather than connecting to the endpoint directly.

Per-subscription dex field

When subscribing across providers, the per-subscription field that selects the venue is named dex (not provider). For Ondo the value is ondo.

await ws.subscribe(
  { channel: 'orderbook', dex: 'ondo', marketId: 'BTC-USD.P' },
  (event) => {
    // event.data: orderbook snapshot / updates
  }
);

See SDK / Streaming for the full list of normalized channels and the subscription lifecycle.