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Project Structure

The public workspace is split into five crates.

alpaca-core​

Shared primitives:

  • credentials
  • base URLs
  • query writer
  • pagination helpers
  • decimal and integer serde helpers

Not here:

  • resource clients
  • Alpaca resource models
  • transport execution

alpaca-rest-http​

Shared transport:

  • request parts
  • HTTP client wrapper
  • retry configuration
  • response and error metadata
  • observer hooks
  • concurrency limiting

Not here:

  • resource-specific request builders
  • market-data or trading models
  • application state

alpaca-data​

Market Data SDK:

  • stocks
  • options
  • news
  • corporate actions

Not here:

  • crypto
  • websocket
  • forex
  • fixed income
  • logos
  • screener

alpaca-trade​

Trading SDK:

  • account
  • account configurations
  • activities
  • assets
  • calendar
  • clock
  • options contracts
  • orders
  • portfolio history
  • positions
  • watchlists

Not here:

  • broker API
  • FIX
  • trading websocket/stream APIs
  • high-level order workflows

alpaca-mock​

Executable mock server with a thin library surface for tests and mock-state bootstrapping.

Not here:

  • a fully generic Alpaca simulator
  • invented fallback market data