REST APIStocks & Equities

Marketstack Stock Data REST API

Marketstack Stock Data REST API is a rest api from APILayer (Marketstack) providing stocks & equities data. Marketstack is a low-cost JSON REST API for real-time, intraday, and end-of-day stock, index, and ETF prices across global exchanges. A Polymarket bot would use it for authoritative settlement-price lookups on equity/index markets like "will TSLA/SPX close above $X" — pulling official EOD closes or near-real-time quotes at resolution time.

At a glance

ProviderAPILayer (Marketstack)
TypeREST API
CategoryStocks & Equities
Real-timeNo — request/response
AuthAPI key
PricingFree tier (100 req/mo, EOD only); paid from $9.99/mo (Basic) to $149.99/mo (Business), plus custom Enterprise — Free: $0 — 100 req/mo, end-of-day data, 1 year history, Basic: $9.99/mo ($8.99 annual) — 10,000 req/mo, IEX intraday (US), 10 years history, commercial use, Professional: $49.99/mo ($43.99 annual) — 100,000 req/mo, real-time updates (~60s), 15+ years history, Business: $149.99/mo ($127.99 annual) — 500,000 req/mo, real-time, financial statements/company facts; Enterprise custom

What data it provides

  • End-of-day OHLCV prices (official daily closes for settlement)
  • Real-time/intraday quotes down to 1-min intervals (IEX for US stocks)
  • Historical EOD prices up to ~30 years deep
  • Market indices (e.g. SPX/S&P) and ETF prices
  • Tickers, exchange, and timezone metadata
  • Corporate actions: stock splits and dividends

Features

  • Coverage: 70+ global stock exchanges, 30,000+ tickers, 750+ market indices
  • Real-time updates as frequent as every 60 seconds (Professional+ tiers)
  • Intraday intervals as short as 1min (IEX, US stocks)
  • History depth up to ~30 years on higher tiers
  • Simple JSON REST endpoints (eod, intraday, tickers, exchanges, splits, dividends)
  • HTTPS encryption gated to paid plans; free tier is HTTP only

Links

Use it in a bot

Other stocks & equities data sources

Listed, not endorsed. Pricing and capabilities change without notice — check the provider's own documentation before you depend on anything here. Browse the full data resources directory or the strategy database.
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