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US market data API

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US market data API (REST, WebSocket, flat files) for stocks, options, indices, currencies and futures with 100% US ticker coverage and up to 20+ years of history, tiered from a free 2-year plan to $199/mo

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Universe, instruments and categories.

Categories
financial market data API / feed

Polygon has not added their own details yet. Not yet on file:

  • Dataset
  • Data dictionary
  • Coverage
  • Provenance
  • Rights & data handling