Best Finance & Data APIs (2026)
Best Finance & Data APIs (2026) are ReefAPI category hubs for live JSON: finance APIs return market, exchange-rate, indicator and financial reference data. ReefAPI offers 4 finance & data APIs behind one key, one credit pool and the same { ok, data, meta, error } envelope, with examples derived from the catalog and committed live snapshots.
Ranked Finance & Data API list
Ordered by how many endpoints each API exposes, then alphabetically.
| # | Engine | What it returns | Actions | Snapshot sample | Free tier | Landing |
|---|---|---|---|---|---|---|
| 1 | Stocks & Finance | single or multi-symbol quote | 78 | query: apple; quotes: AAPL | yes | View API |
| 2 | World Bank | time-series for one+ indicators (code or shortcut) across one+ countries/all; date/mrv/mrnev, r... | 8 | indicator_code: NY.GDP.MKTP.CD; indicator_name: GDP (current US$) | yes | View API |
| 3 | Legal Entity & LEI | One LEI → the full verified legal-entity record (Level-1 who-is-who): legal name, addresses, ju... | 7 | query: Apple Inc; scope: auto | yes | View API |
| 4 | Currency & FX | latest reference rates for a base (default EUR) → all or selected target currencies (+ unix tim... | 6 | base: EUR; date: 2026-09-23 | yes | View API |
What each Finance & Data API covers
Stocks & Finance includes 78 actions (quote, chart, search). Quotes, charts, fundamentals and market data. The primary catalog return is single or multi-symbol quote.
World Bank includes 8 actions (indicator, country, search_indicators). Global economic indicators by country. The primary catalog return is time-series for one+ indicators (code or shortcut) across one+ countries/all; date/mrv/mrnev, r....
Legal Entity & LEI includes 7 actions (lookup, search, autocomplete). Legal Entity & LEI The primary catalog return is one lei → the full verified legal-entity record (level-1 who-is-who): legal name, addresses, ju....
Currency & FX includes 6 actions (latest, convert, historical). Exchange rates, conversion and historical rates. The primary catalog return is latest reference rates for a base (default eur) → all or selected target currencies (+ unix tim....
Questions about Finance & Data APIs
Which Finance & Data API is free?
Every Finance & Data API listed here can be tried with ReefAPI's free tier: 1,000 credits on signup, no card required. The current hub includes Stocks & Finance, World Bank, Legal Entity & LEI, Currency & FX.
Do these Finance & Data APIs need login?
No source-site login is needed for the listed ReefAPI responses. You call ReefAPI with an x-api-key header, and each engine returns the standard JSON envelope.
How fresh is the Finance & Data data?
Production requests fetch live data through ReefAPI. The table's sample data point comes from the committed snapshot for each engine, and the sitemap uses catalog freshness for recrawling.
What is the best Finance & Data API to start with?
Stocks & Finance appears first because this hub ranks engines by action count, then alphabetically for ties. Use that as a coverage signal, then choose the API whose returned fields match your workflow.