Alpaca

alpaca.markets

Provides APIs for trading US stocks, ETFs, options, and cryptocurrencies and for accessing real-time and historical market data.

The Alpaca API uses api key authentication; has freemium pricing; offers a free tier (Free sign-up; paper trading and free market data available). Verified 2026-07-08 with per-field source links.

Finance Verified 2026-07-08 medium confidence

Base URL

https://paper-api.alpaca.markets

forum.alpaca.markets ↗

Auth

api_key

forum.alpaca.markets ↗

Free tier

Free sign-up; paper trading and free market data available

alpaca.markets ↗

Pricing model

freemium

alpaca.markets ↗

Pricing

Commission-free trading for US-listed securities and options through the API; advanced/paid market data plans and Elite offering available

alpaca.markets ↗

Rate limits

not documented null

no source

OpenAPI spec

not documented null

no source

MCP server

Alpaca MCP Server for trading with natural language

alpaca.markets ↗