Is the LobsterMail 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 LobsterMail to Claude or Cursor?

Connect LobsterMail 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 LobsterMail?

It can call 10 tools, including Create Inbox, Get Inbox, Delete Inbox, and chain them with steps in other apps inside the same run.

Is it safe to let an agent call LobsterMail?

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.

LobsterMail MCP server

Email infrastructure for AI agents — create inboxes, send and receive email, search, threads, and webhooks.

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

Start building See the LobsterMail integration

Tools: 10
Works with: Any MCP client
Auth: API key
License: MIT, open source
Updated: September 2026

About the LobsterMail MCP server

Connect LobsterMail 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 LobsterMail and 760+ other apps over a single connection, on our cloud or a self-hosted install.

Tools

LobsterMail tools your AI can run

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

Create Inbox
Create a new email inbox on LobsterMail.
3 fields
Get Inbox
Get details for a single inbox including its address, status, and settings.
1 field
Delete Inbox
Permanently delete an inbox and release its address. This action cannot be undone.
1 field
List Inboxes
List all email inboxes on the account.
Send Email
Send an email from one of your LobsterMail inboxes. Requires a verified account (Tier 1+).
8 fields
List Emails
List emails in a specific inbox.
4 fields
Get Email
Get a single email with full body content.
2 fields
Search Emails
Search emails across inboxes using full-text search and optional filters. Rate limited to 30 requests/minute.
6 fields
Get Account
Get account details including subscription tier, usage, and sending limits.
Custom API Call
Make a custom API call to a specific endpoint
10 fields

Triggers

LobsterMail events your agent can watch

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

New Email Received
Triggers instantly when a new email is received in an inbox.
1 field
New Email Thread
Triggers when a brand-new conversation (thread) is started in an inbox.
1 field
Thread Reply Received
Triggers when someone replies to an existing email thread. Useful for follow-up and support automation.
1 field
Email Bounced
Triggers when an outbound email fails to deliver. Use this to update CRM records, retry with a different address, or alert your team.
1 field
Email Sent
Triggers when an outbound email is successfully delivered. Use for audit logs, CRM updates, or confirming delivery.
1 field

Give your assistant LobsterMail

Connect LobsterMail 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

LobsterMail MCP, answered.

No. That is the point of it. One Activepieces server exposes LobsterMail alongside every other piece you connect, so your client keeps a single connection.