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

# Introduction

> Constants gives ChatGPT, Claude, and other AI assistants the ability to do things in the tools you already use.

Apps and Tools for ChatGPT, Claude, and whatever AI you use next.

## What Constants is

Your AI assistant is good at writing, explaining, and summarizing. It cannot check your inbox, pull a number out of a spreadsheet, or file a ticket for you.

Constants gives it the ability to do those things. You add the apps and tools you want, connect the accounts they need, and your assistant can use them in conversation. Some tools come ready to use, and some your colleagues share with you.

You can also build your own and share them with your team. A tool you make once is a tool everyone you invite can use, in whichever assistant they prefer.

## How you can use it

Use your tools in ChatGPT, Claude, Slack, or right here in Constants Chat.

**Constants Chat** is the quickest way to start. Open it and use your tools straight away, with nothing else to set up.

**ChatGPT, Claude, and Slack** each connect once, in their own settings. After that the assistant can use your tools in the conversations you are already having, including in the Slack channels you share with your team.

It is the same tools, the same connected accounts, and the same permissions everywhere. You are setting up one workspace, not four.

## Key concepts

A **tool** does one thing. Some tools use a **connection** to reach an outside service; others need nothing but their own code. An **app** is a set of related tools. Your **workspace** holds all of it.

For example, a Gmail connection can power three tools: Search email, Send email, and Create draft. Together they make up the Gmail app. A tool can also stand on its own: for example, Clean up email list takes a messy list of addresses, removes duplicates, and flags the broken ones. No app is needed for this tool, and no connection either.

|                | Can your assistant run it?  | Where you find it                                                             |
| -------------- | --------------------------- | ----------------------------------------------------------------------------- |
| **App**        | It runs the tools inside it | Browse apps                                                                   |
| **Tool**       | Yes                         | Browse apps, or your workspace under **My Tools**                             |
| **Connection** | Never, tools use it         | Tool Builder under **Build With**, or your workspace under **My Connections** |

## Where to go next

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Use a tool, add an app, and connect your assistant.
  </Card>

  <Card title="Try out tools" icon="sparkles" href="https://www.constants.io/agent">
    Use tools in Constants Chat, without setting anything up.
  </Card>

  <Card title="Browse apps" icon="grid" href="https://www.constants.io/apps">
    See what you can add to your workspace.
  </Card>

  <Card title="Building tools" icon="wrench" href="/building-tools">
    Make a tool of your own, no code required.
  </Card>

  <Card title="Workspaces and sharing" icon="users" href="/workspaces">
    Invite your team and control who can access what.
  </Card>
</CardGroup>