> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fincept.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Physics Module

> Information theory - Pro tier

# Physics Module

**Tier:** Pro | **Cost:** 5 credits | **Endpoints:** 24
Shannon entropy, KL divergence, Ising model, thermodynamics.
[Full API Reference →](/api-reference/quantlib-physics)