# How connecting works

Each AI tool connects to ZeroWidth over MCP with one address, and each person signs in as themselves.

AI tools reach ZeroWidth over MCP, the standard way AI apps connect to other services. A connected tool checks past decisions before a choice and reports new ones as they're made.

## Your team's address

Hosted ZeroWidth gives each team one MCP address. In the ZeroWidth console, open **Connect AI tools** to copy your team's address and see the steps for your tool.

Self-hosted ZeroWidth serves MCP at `http://127.0.0.1:4380/mcp` on your own computer, or at your server's address on port 4380. [Try ZeroWidth in five minutes](https://zerowidth.ai/docs/get-started/try-zerowidth)

## Signing in

With hosted ZeroWidth, each tool signs in to your team as you. Each connection is bound to one person and one team, and you can disconnect a tool at any time from **Connected AI tools** in the console.

A self-hosted team server uses one shared token instead. Treat the token as a team password, and serve only inside your network.

## Teaching a tool when to record decisions

Connecting gives a tool ZeroWidth's MCP tools. A short set of instructions tells the tool when to use them: check past decisions before a choice, and report a decision once the person agrees to it. Each tool's page links the instructions for that tool.

## The tools

- [Claude](https://zerowidth.ai/docs/connect/claude)
- [Claude Code](https://zerowidth.ai/docs/connect/claude-code)
- [ChatGPT](https://zerowidth.ai/docs/connect/chatgpt)
- [Cursor](https://zerowidth.ai/docs/connect/cursor)
- [VS Code and GitHub Copilot](https://zerowidth.ai/docs/connect/vs-code)
- [Codex](https://zerowidth.ai/docs/connect/codex)
- [Windsurf](https://zerowidth.ai/docs/connect/windsurf)
- [Antigravity](https://zerowidth.ai/docs/connect/antigravity)
- [Microsoft Copilot Studio](https://zerowidth.ai/docs/connect/copilot-studio)
- [Other MCP tools](https://zerowidth.ai/docs/connect/other-tools)

An AI tool with no MCP can still send decisions to ZeroWidth: export the tool's history and bring the export in. [Bring in past chats](https://zerowidth.ai/docs/connect/past-chats)