Massive.com (formerly Polygon.io) / Finance
Massive stock market data API
Use a Massive API key to query U.S. stock trades, OHLC aggregates, unified snapshots, and ticker reference data; availability depends on the data plan.
GET /v2/aggs/ticker/{stocksTicker}/prev
Get previous-day aggregate
Retrieve the previous trading day's OHLC, volume, VWAP, and transaction count for a stock ticker. Results are split-adjusted by default.