Alpaca

REST API: https://data.alpaca.markets/v2 — Create a free paper account

Setup

STOCKFEED_ALPACA_API_KEY=your_key_id
STOCKFEED_ALPACA_SECRET_KEY=your_secret_key

Supported intervals

All intervals: 1m, 5m, 15m, 30m, 1h, 4h, 1d, 1w, 1mo.

Rate limits

Rate limits vary by subscription. stockfeed reads X-RateLimit-* headers and handles 429 responses.

Authentication

Uses APCA-API-KEY-ID and APCA-API-SECRET-KEY headers. A ProviderAuthError is raised on HTTP 403.

Notes

• Alpaca specialises in US equities; international tickers may not be available
• Free paper accounts provide access to historical data
• vwap and trade_count are populated when available (intraday bars)

Known limitations

• Crypto data is available but stockfeed's CoinGecko provider is the planned crypto path
• close_adj is not returned by Alpaca; field will be None