Official Mailercloud MCP Server

Mailercloud is an email marketing platform for growing businesses. The official Mailercloud MCP server lets AI assistants work directly in your Mailercloud account. You can create, schedule and test campaigns, and manage contacts, lists, tags, segments, templates, webhooks and suppressions. You can also send transactional email, and get campaign analysis with letter grades against industry benchmarks, campaign comparisons, an engagement funnel, inbox placement data and a pre-send audit. It is a remote server with nothing to install. Sign in with OAuth 2.1 or use a Mailercloud API key. It works on every Mailercloud plan, including the free plan.

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Documentation

Mailercloud plugin for Claude Code

Bundles the Mailercloud MCP server together with ready-made commands, a best-practices skill, and a campaign-manager subagent — so Claude Code users get expert Mailercloud workflows out of the box, not just the raw tools.

This is a Claude Code plugin. For claude.ai / Desktop / Mobile, use the Mailercloud connector in the Claude directory instead — same server, broader reach.

What's inside

Piece	What it adds
`.mcp.json`	Connects the Mailercloud MCP server (`https://mcp.mailercloud.com/mcp`, 47 tools)
`/mailercloud:campaign-audit`	Audit a draft campaign before sending
`/mailercloud:analyze-campaigns`	Analyze recent campaigns + action plan
`mailercloud-best-practices` skill	Tool map, pre-send checklist, deliverability & metric guidance
`campaign-manager` agent	A specialist persona for multi-step campaign work

No changes to the Mailercloud server are required — the plugin only references it.

Install

Run these in Claude Code one at a time (each is a separate slash command — enter the first, wait for it to finish, then enter the second). Do not paste both lines together.

1. Add the marketplace:

/plugin marketplace add https://github.com/mailercloud-com/mailercloud-plugin.git

2. Install the plugin:

/plugin install mailercloud@mailercloud

Use the full https://….git URL above. The GitHub shorthand (mailercloud-com/mailercloud-plugin) makes Claude Code clone over SSH, which fails if you don't have GitHub SSH keys configured. The HTTPS URL works for everyone.

Then restart Claude Code if prompted, and try /mailercloud:campaign-audit.

Requirements & authentication

A Mailercloud account (sign up at https://mailercloud.com).
The first time a Mailercloud tool runs, Claude Code connects the MCP server and prompts you to authorize — sign in to Mailercloud (OAuth) or provide a Mailercloud API key. Until you authorize, the tools will report that authentication is required; this is expected.

Verify it installed

/plugin list                     # should show: mailercloud@mailercloud

You should also see /mailercloud:campaign-audit and /mailercloud:analyze-campaigns in the slash-command list, and the mailercloud MCP server under your connected tools.

Local development

To test changes without publishing, add the folder as a local marketplace:

/plugin marketplace add ./mailercloud-plugin
/plugin install mailercloud@mailercloud

Structure

mailercloud-plugin/
  .claude-plugin/
    plugin.json          # plugin manifest
    marketplace.json     # makes this repo installable as a marketplace
  .mcp.json              # references the remote Mailercloud MCP server
  commands/              # /mailercloud:* slash commands
  skills/                # mailercloud-best-practices
  agents/                # campaign-manager