Paper Trading API for Node.js

// Node 18+ (native fetch)
const tokenRes = await fetch('https://api.paperinvest.io/v1/auth/token', {
  method: 'POST', headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({ apiKey: 'YOUR_API_KEY' })
});
const { access_token } = await tokenRes.json();

await fetch('https://api.paperinvest.io/v1/orders', {
  method: 'POST',
  headers: { 'Authorization': `Bearer ${access_token}`, 'Content-Type': 'application/json' },
  body: JSON.stringify({
    accountId: 'your-account-id', portfolioId: 'your-portfolio-id',
    symbol: 'TSLA', quantity: 5, side: 'buy', type: 'market', timeInForce: 'day'
  })
});

import WebSocket from 'ws';

const ws = new WebSocket('wss://api.paperinvest.io/v1/market-data/stream', {
  headers: { Authorization: 'Bearer YOUR_JWT' }
});

ws.on('open', () => {
  ws.send(JSON.stringify({ action: 'subscribe', symbols: ['AAPL','MSFT'] }));
});

ws.on('message', (msg) => {
  const data = JSON.parse(msg.toString());
  if (data.type === 'quote') console.log(data);
});

ws.on('close', () => { /* reconnect */ });
ws.on('error', (e) => console.error('ws error', e));