Research tools
ETF Screener & Rankings
Filter ETFs by return and yield, or pull leaderboards — same data in the dashboard and via API for your app.
US ETF API for builders
Screener, heatmap, rankings, backtests, and portfolio rebalance — one API key. Ship ETF tools in your app, not in another browser tab.
Official SDKs: npm · PyPI · see docs
Free: 50 requests/day · ETF list, screener, rankings, heatmap & batch prices · no historical / backtests · no card requiredStarter (₹1,500/mo): 1,000 requests/day · historical OHLCV · backtesting · portfolio tools
Product
Everything you need to build with US ETF data
One API for ETF historical depth, batch pricing, and backtesting—designed so your users see polished charts, not broken pipes.
ETF
Focused data
US exchange-traded funds
REST + WS
One platform
HTTP & WebSocket
50/day
Free tier
No card · no history
Swagger
Live docs
Try requests in-browser
Core data
ETF prices & history
Batch ETF quotes and historical series for backtests — structured JSON you can trust for apps and research.
Platform
Backtesting
Buy-and-hold simulations with CAGR, drawdown, dividend yield, and equity curves on ETF history.
Visualization
ETF heatmap
Preset baskets (broad, dividend, sector) or custom symbol lists — colored by return for quick sector reads.
Try it in seconds
Sign up, copy your key, and call the API. Our docs mirror production so what you read is what you run.
curl -H "x-api-key: YOUR_KEY" \
https://api.datacaptain.in/v1/etf/list?search=SPY&limit=10Why pay ₹1,500/month?
Free ETF websites are for reading.
DataCaptain is for building.
If you need ETF data inside your app, dashboard, or research pipeline — not another tab in Chrome — that is what Starter is for.
Free ETF websites
- —Manual research in a browser
- —No API for your app or bot
- —No backtests inside your product
- —No portfolio rebalance automation
- —Scattered tools, no single workflow
DataCaptain Free — ₹0
- ·50 requests/day
- ·ETF list, screener, rankings, heatmap
- ·Batch latest prices + market status
- ·No historical OHLCV or backtests
- ·No credit card
Starter — ₹1,500/mo
- ✓Everything in Free, plus…
- ✓Historical ETF OHLCV
- ✓Backtesting & portfolio rebalance APIs
- ✓1,000 requests/day for production apps
- ✓TypeScript & Python SDKs
Client libraries
Official TypeScript and Python SDKs — install from npm or PyPI.
npm install datacaptainpip install datacaptainOne platform, more than APIs
ETF data, backtesting, and portfolio tools — same login, same database, same API key.
Key Features
Historical ETF Data
Daily historical prices for US exchange-traded funds — built for backtests and research.
Simple REST API
Fetch market data using simple endpoints with predictable JSON responses.
Developer Friendly
Well documented endpoints, consistent schema, and easy authentication using API keys.
Fast & Reliable
Optimized infrastructure designed for high performance data retrieval.
ETF Universe Coverage
Browse the full ETF universe, fetch batch prices, and drill into symbol-level details.
Built for
This platform is designed for professionals who need reliable market data
Algorithmic traders
Financial analysts
Developers building fintech apps
Quantitative researchers
Trading bot developers
Free / Starter / Pro / Scale
Exact limits on every card. Free has no card required — upgrade when you need history and backtests.
Free
Prototype with a real API key — no card
₹0
50 requests/day
- 50 requests/day
- ETF list, screener, rankings & heatmap
- Batch latest prices
- Market status
- API key + docs + SDKs
Unlocks at ₹1,500/mo
- →Historical ETF prices
- →Backtesting & portfolio rebalance
- →1,000+ requests/day
Daily cap — upgrade to Starter when you need more
Most popular
Starter
Ship production ETF tools
₹1,500/month
1,000 requests/day
- 1,000 requests/day
- Historical ETF OHLCV
- Backtesting & portfolio compare
- ETF symbol details
- Email support
Daily cap — upgrade to Pro for 10× volume
Pro
Growing apps & heavier research
₹2,500/month
10,000 requests/day
- 10,000 requests/day
- Everything in Starter
- Higher rate limits
- Priority support
Daily cap — upgrade to Scale for high volume
Scale
High-volume production
₹5,000/month
100,000 requests/day
- 100,000 requests/day
- Everything in Pro
- High-volume production workloads
- Dedicated onboarding
Need more? Email sales for custom volume