DISPATCH2026-09-23
Free Market Data APIs for Earnings-Season Projects
Not financial advice. Verify claims independently.
Building an earnings tracker this week? These free tiers will get you to production.
The free API tiers that can actually power an earnings tool:
- Polygon.io — free tier: delayed quotes, reference data; earnings calendar on paid
- Finnhub — free earnings calendar endpoint, decent rate limits
- Alpha Vantage — free tier: 25 req/day, usable for prototypes
- Financial Modeling Prep — free earnings calendar + financials
- SEC EDGAR — full-text filings, free forever, just ugly
The trap: "free" tiers that are delayed 15 minutes or watermark your output. For earnings specifically, Finnhub and FMP have the cleanest free calendar endpoints.
Wire the output into a paper-trading practice loop on Stock Picks — free data in, free practice out.
SURPLUS ISSUE
Put it into practice
Rehearse this strategy risk-free on Stock Picks — the reference free paper-trading tool listed in the Mkts/Apps field manual.
Open Stock Picks →