---
title: API Reference
description: Documentation for the complete Sigma Appscript API. Open the Sigma Appscript API Reference → The reference covers all namespaces — Sigma.Document, Sigma.Evaluator, System.IO, COM and others — with its own contents and index navigation.
url: "https://developer.sigmaestimates.com/docs/api-reference/"
updated: "2026-09-16"
category: General
---

# API Reference

Documentation for the complete Sigma Appscript API.


Open the Sigma Appscript API Reference →


The reference covers all namespaces — Sigma.Document, Sigma.Evaluator,
System.IO, COM and others — with its own contents and index navigation.