Alpaca
Commission-free broker API with built-in market data
Quick Facts
| Asset coverage | US Equities, US Options, Crypto |
| Historical depth | 2016–present (minute bars); limited tick |
| Data latency | second |
| API types | REST, WebSocket, SDK |
| SDKs | Python, JavaScript, Go, C# |
| Rate limits | 200 req/min free; higher on paid plans |
| Data formats | JSON |
| Affiliate program | ✗ No |
| Last updated | 2026-05-24 |
Ratings
API quality ★★★★☆ 4/5
Doc quality ★★★★☆ 4/5
Community large
Best for
- Retail algo traders
- Python quants
- Paper trading bots
- US equity automation
Not ideal for
- International markets
- Deep historical tick data
- Options analytics
Pricing Plans
$0/mo
Free
Real-time IEX data + paper trading
$99/mo
Algo Trader Plus
SIP real-time data + unlimited API calls
Free tier: Free tier: real-time IEX feed, unlimited historical (15-min delay on SIP)