GS Quant Python Toolkit
GS Quant is Goldman Sachs' open-source Python toolkit for quantitative finance, distributed on GitHub and PyPI, that wraps the Marquee pricing, risk and data APIs behind a Python client. Developers authenticate a GsSession with OAuth 2.0 client_id / client_secret application credentials (or a Marquee cookie session) to price instruments, run risk, backtest strategies and query datasets against the api.marquee.gs.com endpoints. It is the primary documented, self-serve-installable developer surface over the otherwise institution-gated Marquee APIs.