# ChatStack — Product Requirements & Quoting Agent

Last updated: 2026-02-09  
Canonical: https://www.chatstack.app/

## Overview
ChatStack is a chat-based, multi-agent system that helps users turn a software idea into:

- A structured Product Requirements Document (PRD) bundle in JSON (machine-readable)
- A high-level development estimate (cost + timeline) derived from the PRD scope

## How to interact (humans & LLMs)
- Use the web UI: https://www.chatstack.app/
- Do not scrape/parse the chat DOM. If you need structured data, prefer the platform’s supported integrations.
- The site does **not** currently expose a standalone public MCP endpoint for external agents.

## Outputs (typical)
- **PRD bundle (JSON)**: scope, user stories, requirements, and implementation notes
- **Estimate**: indicative cost and timeline based on scope
- **Suggested approach**: high-level architecture and technology recommendations

## First-party endpoints (for the on-site widget)
These endpoints exist to support the site’s ChatKit-based UI. They may be rate-limited and are only CORS-enabled for a small allowlist of origins.

- **Create a ChatKit session**: `POST https://www.chatstack.app/api/create-session`
- **Submit PRD bundle / form actions**: `POST https://www.chatstack.app/api/chatkit-actions`
  - Expected action type: `prd.submit`
  - Payload typically includes user contact fields and `prd_bundle_json` (stringified JSON)

## Crawling & discovery
- Robots: https://www.chatstack.app/robots.txt
- Sitemap: https://www.chatstack.app/sitemap.xml

## Legal
- Non-Disclosure and T&Cs: https://www.chatstack.app/non-disclosure-and-tcs

## This file
- https://www.chatstack.app/llm.txt
- https://chatstack.app/llm.txt