@efixdata/connector-massive

Market data adapter for @efixdata/exeria-chart powered by Massive (formerly Polygon.io) — US stocks, forex, and crypto OHLCV.

License: paid, source-available (EULA). The source is published for evaluation and integration. Production or commercial use requires a paid license from Efix Data Sp. z o. o. See the package LICENSE and the repository LICENSING.md.

Features

• US stocks (AAPL, SPY), forex (EUR/USD), and crypto (BTC-USD) on one adapter
• REST aggregates with pagination
• Real-time updates via per-market WebSocket channels (AM / CA / XA)
• Automatic market detection and symbol normalization

Requirements

• API key from Massive (required)
• Node.js 18+ with fetch

Installation

npm install @efixdata/exeria-chart @efixdata/connector-massive

Quick Start

import { createChart } from "@efixdata/exeria-chart";
import { MassiveAdapter } from "@efixdata/connector-massive";

const connector = new MassiveAdapter({
  apiKey: process.env.MASSIVE_API_KEY!,
});

const chart = createChart({
  container: "#chart",
  dataAdapter: connector,
});

chart.init();

await chart.loadData("AAPL", {
  interval: "1d",
  limit: 500,
});

chart.subscribeToUpdates("AAPL");

Do not embed your API key in browser bundles — run this adapter on your server or behind a proxy.

API Reference

MassiveAdapter implements the DataAdapter interface from @efixdata/exeria-chart:

• initialize(config)
• getHistoricalData(symbol, options)
• getCurrentPrice(symbol)
• subscribeToUpdates(symbol, callback)
• disconnect()

Licensing

This adapter is paid, source-available software under an EULA. Market data is also subject to Massive pricing and terms.