Connect Nickbox to Claude Code

One command adds Nickbox to Claude Code, and the /mcp menu handles sign-in.

Before you start

Claude Code installed and working in your terminal.
A Nickbox account with at least one inbox connected.
Your MCP URL. Here it is https://nickbox.io/mcp; the real one is in the dashboard under Connect.

Add the server from your terminal:
```
claude mcp add --transport http nickbox https://nickbox.io/mcp
```
By default this saves the server for your current project. Add --scope user if you want it in every project.
Start Claude Code:
```
claude
```
Inside Claude Code, run:
```
/mcp
```
Select nickbox and choose to authenticate. Your browser opens the Nickbox sign-in page.
Sign in with Google and approve read-only access. When the browser says you can close the tab, return to the terminal. The status of nickbox should now read connected.

In Claude Code, ask:

list my inboxes

You should see the nicknames you set in the dashboard. You can also confirm the registration from the shell:

claude mcp list

The browser does not open. Claude Code usually prints the sign-in URL in the terminal. Copy it into a browser by hand.
nickbox shows "needs authentication" again. Run /mcp, select nickbox and authenticate once more. Sign-in can expire or be revoked from your Google account.
Command not found or wrong flag. Run claude --version and update Claude Code. Older versions use different options for remote servers.
You added it to one project and it is missing in another. The default scope is the current project. Remove it with claude mcp remove nickbox and add it again with --scope user.
Google blocks the sign-in on a Workspace account. Your admin must allow the app. See the Workspace admin guide.