Answer · TypeScript · WebSocket

TypeScript WebSocket client

Updated 10 November 2026 · PinnFeed · 1 min read

Answer: mirror the Node ws reconnect answer with typed message unions (ping | snapshot | delta | error). Builder (€99/mo) required for /v1/stream.

Sketch#

type Msg =
  | { type: 'ping' }
  | { type: 'snapshot'; part: number; final: boolean; events: unknown[]; markets: unknown[] }
  | { type: 'delta'; changes: unknown[] };

// npm i ws @types/ws

Full reconnect logic: Node answer.

Trial CTA#

Builder (€99/mo) for WebSocket and closing history. 3-day trial; card required, charged after day 3 unless cancelled. Free REST: signup. Related: answers hub, docs.

Questions people ask#

Is there an official SDK?#

No required SDK — plain WebSocket + JSON.

Can Deno/Bun clients work?#

Yes if they speak WebSocket and set the API key header or query.

Is this educational content for adults?#

Yes (18+).