---
title: Prerequisites for using Chat
---

> Agent instructions:
> **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown.
>
> - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version.
> - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt).

To use Chat, you need to have Windows Communication Foundation (WCF) installed and properly configured. Also, there are some licensing limitations to consider.

### Windows Communication Foundation

See [Configuring Windows Communication Foundation](https://docs.kentico.com/k8/configuring-kentico/configuring-windows-communication-foundation.md).

### Licensing

Chat is included in the Ultimate License and Kentico EMS.