Mailzzy MCP Server

Name: Mailzzy
Author: mailzzy

Connect Claude, ChatGPT, Cursor, VS Code and other MCP clients to your Mailzzy account. Ask your assistant to build an audience, draft a campaign, check it against your sending limits, send a test, and schedule it, then pull the performance report when it goes out.

This is a hosted MCP server. There is nothing to install or run: point your client at the URL below and sign in with your Mailzzy account.

https://api.mailzzy.com/crm/mcp/


Documentation	https://mailzzy.com/docs/#mcp-overview
Transport	Streamable HTTP
Authentication	OAuth 2.1 with PKCE and dynamic client registration (sign in with Mailzzy)
Tools	47 (full list)
Account needed	Yes, a Mailzzy account (sign up)
Registry name	`com.mailzzy/mcp`

This repository holds documentation and the registry manifest only. The server itself is operated by SoftSages and is not open source.

What you can do

Campaigns: draft, update, send a test to yourself, send now or schedule, and cancel a scheduled campaign.
Audiences: pick groups, segments or tags, see the de-duplicated recipient count, and check it against your daily and monthly sending limits before you send.
Contacts: create, update, tag, group, archive, and bulk-import from CSV.
Segments: build saved filters, preview how many contacts match, then save them.
Templates and automations: create and edit email templates and automation workflows.
Transactional email: send a one-to-one email and read delivery logs.
Reports: campaign metrics, performance over a date range, and per-domain deliverability.

Example prompts

"Show me my last five campaigns and their open rates."
"Create a segment of contacts tagged webinar-sept who opened anything in the last 30 days, and tell me how many that is."
"Draft a campaign announcing our October sale to that segment, send me a test, and schedule it for Tuesday 10am my time."
"Which recipient domains are bouncing most this month?"

Listings

Official MCP Registry as com.mailzzy/mcp
Smithery
Glama

Connect your client

Claude (claude.ai, desktop and mobile)

Settings > Connectors > Add custom connector, paste https://api.mailzzy.com/crm/mcp/, then Connect and sign in.

Claude Code

bash

claude mcp add --transport http mailzzy https://api.mailzzy.com/crm/mcp/

Then run /mcp inside Claude Code and choose Authenticate.

ChatGPT

Settings > Apps and Connectors > Advanced > turn on Developer mode, then Create a connector with the URL https://api.mailzzy.com/crm/mcp/ and authentication OAuth.

Cursor

~/.cursor/mcp.json:

json

{
  "mcpServers": {
    "mailzzy": {
      "url": "https://api.mailzzy.com/crm/mcp/"
    }
  }
}

VS Code (GitHub Copilot agent mode)

.vscode/mcp.json:

json

{
  "servers": {
    "mailzzy": {
      "type": "http",
      "url": "https://api.mailzzy.com/crm/mcp/"
    }
  }
}

Any other MCP client

Use the URL with Streamable HTTP transport. The server answers unauthenticated requests with 401 and a WWW-Authenticate header pointing at its protected resource metadata, so any client that follows the MCP authorization spec can discover the authorization server and register itself.

Authentication and permissions

You sign in on Mailzzy's own login page. Your password is never shared with the AI client.
The client receives a short-lived access token scoped to your account. Every tool call acts as you and can only see your own account's data.
Scopes advertised: mcp:read, mcp:write, mcp:send.
Every tool carries MCP annotations. Read tools are marked read-only. Sending a campaign or transactional email, deleting a contact, and cancelling a campaign are marked destructive, so well-behaved clients ask you to confirm before running them.
To disconnect, remove the connector in your client.