Massive Connector

Building multi-asset charts — US stocks (AAPL), forex (EUR/USD), and crypto (BTC-USD)? The Massive connector (formerly the Polygon.io adapter) wraps the Massive API and implements the same DataAdapter contract as Twelve Data and Finage.

Stocks

Forex

Crypto

Timeframe

Loading chart…

Use the controls above to switch asset class, symbol, and timeframe. This docs demo routes requests through /api/massive so your API key stays on the server.

Standalone demo

Full-page version with sample code: Massive live demo.

API key required

Massive requires an API key in production. Store it in MASSIVE_API_KEY (or legacy POLYGON_API_KEY) and run the adapter on your server or behind a proxy — never ship the key in a browser bundle. For local docs demos, add the key to apps/docs/.env.local.

What you get

Feature	Details
Stocks	US equities (AAPL, MSFT, …)
Forex	Major pairs (EUR/USD, GBP/USD, …) → C:EURUSD tickers
Crypto	Pairs like BTC-USD → X:BTCUSD tickers
History	OHLCV via /v2/aggs/ticker/{ticker}/range/{multiplier}/{timespan}/{from}/{to}
Live ticks	WebSocket per market (stocks, crypto, forex) or REST polling in docs proxy

Perfect for wealth apps, trading terminals, and multi-asset dashboards on a single vendor.

Massive vs Twelve Data / Finage

	Massive	Twelve Data	Finage
Stocks	✅ Native US equities	✅	Limited
Forex	✅ C: prefix	✅ EUR/USD style	✅ EURUSD compact
Crypto	✅ X: prefix	✅	✅
Symbol format	AAPL, C:EURUSD, X:BTCUSD	EUR/USD	EURUSD
Best for	US stocks + multi-asset on one key	Quick multi-asset demo	UK forex vendor

Licensing

Tier	Typical use
Free / trial	Development, personal testing
Paid	Production apps with external display

Check Massive pricing before shipping to end users.

Install

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: document.getElementById("chart")!,
  dataAdapter: connector,
});

chart.init();

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

// Forex
await chart.loadData("EUR/USD", { interval: "1h", limit: 500 });

// Crypto
await chart.loadData("BTC-USD", { interval: "1h", limit: 500 });

chart.subscribeToUpdates("AAPL");

API key setup

Sign up at massive.com, generate an API key, and store it securely:

# apps/docs/.env.local (local demos only)
MASSIVE_API_KEY=your_key_here

The docs dev server exposes /api/massive/ohlcv and /api/massive/ticker through massiveProxyPlugin.js.

Symbol reference

You pass	Massive REST ticker	WebSocket channel
AAPL	AAPL	AM.AAPL
EUR/USD	C:EURUSD	CA.C:EURUSD
BTC-USD	X:BTCUSD	XA.X:BTCUSD

The adapter detects asset class from the symbol string. You can also pass explicit X: / C: tickers.

Related

• Twelve Data connector — alternative multi-asset vendor
• Finage connector — forex-focused UK vendor
• Connect with a data connector — tutorial