Financial Market Data APIs

Posted on Apr 25, 2026

All figures and plan details below are as of 2026-04 (unless stated otherwise).

Alpha Vantage

  • Free API key with lifetime access; free tier includes 25 requests/day: Alpha Vantage Support
  • Covers equities, FX, crypto, and technical indicators for prototypes and automations.
  • Official MCP server is referenced for LLM and agent integrations.

Finnhub

  • Free plan includes 60 API calls/minute (personal use): Finnhub pricing
  • Useful for company fundamentals, news, and market data (limits vary by endpoint).

Twelve Data

  • Basic plan is free with 800/day API credits and 8 calls/min: Twelve Data pricing
  • Covers stocks, forex, crypto, and technical indicators (limits apply).

Financial Modeling Prep (FMP)

  • Basic tier is free with 250 calls/day: FMP pricing
  • Strong for fundamentals, ratios, statements, and screening workflows.

marketstack

  • Free plan includes 100 requests/month with EOD data and 1-year history: marketstack pricing
  • Useful for low-volume dashboards and daily-close analytics.

CoinGecko API

  • Crypto market data API with a free getting-started option (no credit card): CoinGecko API
  • Useful for crypto prices, market caps, exchange data, and related endpoints.

Stooq

  • Free historical OHLCV downloads via CSV: Stooq
  • Useful for backtesting and research when EOD data is enough.
  • No official API guarantees.