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Overview

Add Outbox to Claude as a custom connector and Claude can work in your Outbox account from any chat: build and edit agents, run workflows, search conversations, send messages and calls, and pull reports. You sign in on an Outbox page in your browser. Claude never sees your password. It gets a token that renews itself, and you can disconnect at any time. This works in Claude on the web, the Claude desktop app, Claude on mobile (once it’s added), and Claude Code.
You’ll need your Outbox email and password. If you normally sign in with Google, use Forgot password on the Outbox sign-in page to set a password first.

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Add it to Claude (web and desktop)

1

Open Connectors

In Claude, go to Settings → Connectors and click Add custom connector.
2

Enter the server URL

Fill in:Leave Advanced settings empty. Claude registers itself automatically. Click Add.
3

Sign in

Click Connect. A sign-in page opens. Enter your Outbox email and password and click Sign in and connect.You’re sent back to Claude and the connector shows as connected.
4

Use it in a chat

Start a new chat. Open the tools menu (the + or sliders icon under the message box) and make sure Outbox is switched on. Then just ask:
List my agents and tell me which ones had failed calls this week.
On a Claude Team or Enterprise plan, an owner first adds the connector under Organization settings → Connectors. Each member then clicks Connect and signs in with their own Outbox account, so everyone sees only what their own login can reach.

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Add it to Claude Code

Run this in your terminal:
Then start Claude Code, run /mcp, choose outbox and select Authenticate. Your browser opens the same sign-in page. Once you’ve signed in, return to the terminal and you’re connected.
--transport http is MCP’s Streamable HTTP transport, not unencrypted HTTP. The connection is HTTPS because the URL is. Add --scope user before the name to make it available in every project, not just the current one.
Want slash commands like /outbox-cli:outbox-campaign too? Install the Claude Code Plugin as well. The connector alone gives Claude every tool, and the plugin adds guided commands on top.

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What you can ask

Create an outbound sales agent for Acme Roofing. Friendly, qualifies budget and timeline, books a 15-minute discovery call.
Add every contact tagged “reactivation” that hasn’t been called yet to the AI Reactivation Sequence workflow.
Pull the last 30 calls for the Gamma Plumbing booking agent and tell me why it keeps losing on price.
Text Jane Smith that her appointment moved to 3pm.

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Agency accounts

If you sign in with an agency account, Claude can reach every client under your agency. Tell it which one to work in:
Switch me over to Delta Roofing.
Claude remembers the active client for your connection until you switch again. You can also name the client in a request: “How many calls did Beta Dental take yesterday?”

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Security

  • Your password stays with Outbox. You type it on an Outbox page, never into Claude.
  • Claude holds a token, not your login. It’s replaced every hour and lasts up to 180 days before you’ll be asked to sign in again.
  • Your access, nothing more. Claude can do what your Outbox login can do, and no more.
  • Disconnect any time. In Claude, go to Settings → Connectors → Outbox → Disconnect. Changing your Outbox password also disconnects every connected app.

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Troubleshooting

Check you’re using your Outbox login. If you sign in with Google, set a password with Forgot password on the Outbox sign-in page first.
Sign-in locks for 15 minutes after repeated wrong passwords. Wait, then try again.
Make sure the connector is switched on for the chat in the tools menu, and try naming it: “Using Outbox, list my workflows.”
You changed your password, or the connection reached its 180-day limit. In Settings → Connectors, disconnect Outbox and connect it again.

MCP Server

How the server works, tool groups, and connecting other MCP clients.

Claude Code Plugin

Slash commands and skills for running your agency from the terminal.