Massive (formerly Polygon.io) crypto API vs Crypto Data API
Polygon.io renamed itself Massive on 30 October 2025. Its crypto data is spot only, sourced from Coinbase, Bitfinex, Bitstamp and Kraken; Binance hasn't been a source since 2021. There are no funding rates, open interest, liquidations or order books. Massive is excellent value if you need real-time spot crypto next to stocks and forex in one account. Crypto Data API covers the derivatives and positioning side Massive doesn't.
We build Crypto Data API, so read this as a vendor's comparison. Every competitor fact below comes from that provider's own pricing or documentation pages, linked under Sources, as of 2026-11-04. Prices and limits change, so check their site before you buy. If we got something wrong, email [email protected] and we'll fix it.
Which one should you use?
you want stocks, options, forex and spot crypto under one account, need 10+ years of spot history, and are an individual user (the $49 plan).
you trade perps or build agents that need funding, open interest, liquidations, Hyperliquid data, ETF flows or volatility, or need commercial use without a $999/mo plan.
Side-by-side comparison
| Crypto Data API | Massive (Polygon.io) | |
|---|---|---|
| Free tier | Yes, with no card. 100 requests/day on a new key, 1,000/day once you confirm your email (10/min). Confirming also switches Pro on for 24 hours. | Currencies Basic $0: 5 calls/min, end-of-day data, 2 years of history, individual use. |
| Paid plans | Pro $29/mo ($19/mo billed annually): 10,000 requests/day. Pro Plus $99/mo ($79 annually): 50,000/day plus the history and Parquet archives. Enterprise from $299/mo. | Currencies Starter $49/mo (individual use only). Commercial use needs Currencies Business at $999/mo. |
| Crypto venues | Focused rather than exhaustive: Binance and Hyperliquid market data plus a curated set of sources, not hundreds of exchanges. | Coinbase, Bitfinex, Bitstamp and Kraken. Binance not since 2021. |
| Derivatives | Funding, open interest and long/short ratios (Binance, Hyperliquid). Liquidations from OKX, Bybit and Hyperliquid, and a Hyperliquid liquidation map from on-chain positions. | None: no funding, open interest or liquidations. |
| Hyperliquid | Deep: funding back to 2023, one-minute mark/oracle/OI history from May 2023, every liquidation fill, the liquidation map, whale positioning, gamma exposure, and L2 snapshots every 5 minutes. | Not covered. |
| Order books | Hyperliquid L2 snapshots (5-minute archive) and depth analytics. No CEX order books. | No crypto order-book endpoint. Quotes over WebSocket. |
| ETF flows / volatility index | Daily BTC, ETH and SOL spot-ETF net flows by trade date, settled days only. Crypto Volatility Index (market-wide realized vol) plus Deribit BTC/ETH implied vol. | Not for crypto. |
| Delivery | REST (JSON, some endpoints also in markdown), a Server-Sent Events stream (Pro) and Parquet archives. No WebSocket or FIX. | REST, WebSocket and S3 flat files (daily CSV). |
| MCP server | Yes, hosted at cryptodataapi.com/mcp (API key or browser login), plus an npm package. | Yes: remote mcp.massive.com (OAuth), plus an open-source server. |
| Agent pay-per-call | Yes: pay per request, buy a 1-hour to 7-day pass ($1.50–$30) or buy single archive files in USDC over x402 (Base). An agent can also mint its own free key. | x402 for US stocks only. Crypto is excluded. |
Where Massive is the better choice
Multi-asset builders. If your product spans equities, options, forex and a little crypto, one Massive account is simpler than several vendors, and $49 a month for real-time spot crypto with flat files is hard to beat for personal use.
Where Crypto Data API is the better choice
Anything perp-related. Most crypto volume trades in perpetual futures, and the signals traders watch (funding, open interest, liquidations, positioning) come from derivatives venues Massive doesn't cover. Commercial use is also allowed on all our plans, while Massive's sub-$999 crypto plans are for individual use.
More comparisons
Frequently asked questions
- Is Polygon.io still available?
- Polygon.io became Massive on 30 October 2025. polygon.io redirects to massive.com, and the old api.polygon.io base URL runs in parallel for a transition period with advance notice promised before it's retired.
- Does Massive have crypto derivatives data?
- No. As of November 2026 Massive's crypto product covers spot only: aggregates, trades, quotes and snapshots from Coinbase, Bitfinex, Bitstamp and Kraken.
- Can AI agents pay Massive per call for crypto data?
- Massive supports x402 pay-per-call for US stocks only; its docs say other asset classes aren't available over x402. Crypto Data API sells per-request access, passes and archive files over x402 in USDC.
A free key gives you 100 requests a day straight away and 1,000 a day once you confirm your email, with no card. Every endpoint is documented, and the same data is available to AI agents through our MCP server.
Get a free API keyRead the docsSee pricing