Is the Inbox MCP server free?

Yes. Activepieces is open source and free to start, and the MCP server is included on every plan, from the free cloud tier to any self-hosted deployment.

How do I connect Inbox to Claude or Cursor?

Connect Inbox in Activepieces, enable the server under Settings → MCP Server, then paste your server URL into your client config. It authenticates over OAuth on first use.

What can my agent do in Inbox?

It can call 7 tools, including Add Contact to List, Create Contact List, Update Contact, and chain them with steps in other apps inside the same run.

Is it safe to let an agent call Inbox?

Connections use OAuth2 with limited scopes and are stored under 256-bit encryption, with no API to read them back, so an agent gets scoped access rather than your keys.

Inbox MCP server

Email marketing and transactional email automation with INBOX (useinbox.com). Manage contacts, lists, campaigns, and react to delivery events.

Inbox is not a separate install. One Activepieces MCP server exposes it alongside 760+ other apps, behind a single URL.

Start building See the Inbox integration

Tools: 7
Works with: Any MCP client
Auth: Basic auth
License: MIT, open source
Updated: September 2026

About the Inbox MCP server

Connect Inbox once in Activepieces and every action it ships becomes a tool your assistant can call, behind the same server URL as the rest of your apps. Your agent reaches Inbox and 760+ other apps over a single connection, on our cloud or a self-hosted install.

Tools

Inbox tools your AI can run

Once connected, your assistant can call any of these Inbox actions by asking in plain language.

Add Contact to List
Adds a single contact to an INBOX contact list. Creates the contact if the email is new, otherwise updates the existing contact and ensures it is part of the list.
2 fields
Create Contact List
Creates a new contact list in INBOX where you can later add contacts.
3 fields
Update Contact
Updates an existing INBOX contact. You can add or replace tags and set custom field values.
2 fields
Mark Contact as Unsubscribed
Changes a contact status to Unsubscribed so they stop receiving campaigns from INBOX. You can also mark them as Hard Bounce or Spam Reported.
2 fields
Create Campaign
Schedules an INBOX campaign that sends a saved newsletter to one or more contact lists.
6 fields
Send Transactional Email
Sends a one-off transactional email through INBOX Notify (e.g. password reset, receipt, welcome).
6 fields
Custom API Call
Make a custom API call to a specific endpoint
10 fields

Triggers

Inbox events your agent can watch

These start a run the moment something happens in Inbox, so work gets picked up on its own.

New Contact
Triggers when a new contact is added to your INBOX account (through a form, manual entry, import, or API).
New Campaign
Triggers when a new campaign is created in your INBOX account.
Email Bounced
Triggers when a transactional email permanently bounces (hard bounce) — the recipient address does not exist or is blocked.
Email Spam Reported
Triggers when a recipient marks a transactional email as spam in their inbox.
Email Opened
Triggers each time a transactional email is opened by the recipient. Fires on every open (not unique).
Email Link Clicked
Triggers when a recipient clicks a tracked link inside a transactional email.

Give your assistant Inbox

Connect Inbox once and every tool above is callable from Claude, Cursor or any MCP client, behind the same server URL as 760+ other apps. Free to start.

Get your server URL Talk to sales