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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 URLTalk 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.

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.

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.

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

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.

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