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This page tracks every release of the Molecule Python SDK, including new features, breaking changes, and supported environments. Entries appear in reverse chronological order.

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Version 0.1.0

This is the initial public release of the Molecule Python SDK.

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What’s included

  • Initial public client — full REST and WebSocket client for interacting with the Molecule execution API.
  • REST APIs — MarketsAPI, OrdersAPI, ComplexOrdersAPI, PortfolioAPI, and RiskAPI are all available through a single Molecule (or AsyncMolecule) instance.
  • WebSocket helpers — signed connection helpers via client.ws and client.iter_ws() for streaming orders, fills, positions, balances, orderbooks, and trade prints.
  • Local Ed25519 request signing — all REST requests and WebSocket connections are signed locally using your Ed25519 private key. Canonical string formats for both REST and WebSocket signatures are documented.
  • Synchronous and asynchronous clients — use Molecule for standard blocking usage or AsyncMolecule for asyncio-based workflows.
  • Full error hierarchy — API error codes map to typed Python exceptions: UnauthorizedError, ForbiddenError, NotFoundError, ConflictError, ValidationError, RateLimitedError, RoutingUnavailableError, BadRequestError, and APIError.
  • Supported venues — Demo, Polymarket, and Kalshi.
  • Python compatibility — Python 3.10, 3.11, 3.12, and 3.13.

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Install

Alternatively, install directly from the GitHub repository: