Massive (formerly Polygon.io)
US stock, options, forex and crypto market data API; polygon.io now redirects to massive.com.
A developer favourite for US market data, with a free tier to start and real-time on the top stocks plan.
Who it is for
Developers building bots or dashboards on US stocks who need clean historical and live data.
Strengths
- Free Basic plan: 5 API calls per minute, 2 years of history, end-of-day data.
- Paid stocks plans with unlimited API calls and 5 to 20+ years of history.
Good to know
- Starter and Developer stocks plans are 15-minute delayed; real-time requires Advanced.
- polygon.io URLs now redirect to massive.com; older tutorials use the old name.
Want a bot built on Massive (formerly Polygon.io), or something similar?
We set it up, connect it to your accounts and keep it running.
Real-life uses
Earnings and news alerts
Earnings dates, big moves and headlines for the tickers you hold.
Sources
Every fact on this page comes from these sources, checked on 2026-10-24. If something has changed, the source wins; tell us at hello@heybotify.com.
- https://massive.com/pricing: stocks plans, prices, limits, delays
- https://polygon.io/pricing: permanent redirect (301) to massive.com/pricing
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