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

# Introduction

> Build apps and bots on SigmaChat.

SigmaChat apps post messages, register slash commands, and receive
events over a server-sent event stream. Everything runs over plain
HTTPS with a bot token.

## What you can build

* **Bots** that send and edit messages, respond to slash commands, and
  react to board events.
* **Incoming webhooks** — a URL that posts into one board, no app
  needed.

## Base URL

```
https://sigmachat.org/api/v1
```

Start with [Authentication](/authentication), then browse the API
Reference tab.