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Mailzzy MCP Server

answering

Mailzzy is answering right now. Last checked 12 min ago. Last commit 8 Oct 2026.

Email marketing: campaigns, audiences, contacts, segments, templates and reports.

Uptime history 5 days of history · worst day 96%
5 days agonow
100.0%
Uptime 24h
91 of 91 checks
—
Tools
hidden behind auth
482 ms
Response time
average over 24h
0
Stars
last commit 8 Oct 2026

Mailzzy does not always answer

Over the last week it answered 98.9% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add mcp --transport http https://api.mailzzy.com/crm/mcp/
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://api.mailzzy.com/crm/mcp/"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mcp]
url = "https://api.mailzzy.com/crm/mcp/"
.cursor/mcp.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://api.mailzzy.com/crm/mcp/"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://api.mailzzy.com/crm/mcp/"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URLTransportStateLatencyChecked
https://api.mailzzy.com/crm/mcp/ streamable-http sign-in 562 ms 12 min ago

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Mailzzy — questions

Answers built from our own checks of this server.

Why is there no tool list for Mailzzy?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.
Is Mailzzy working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 482 ms. The bar chart above shows every period we have measured.
How do I connect Mailzzy?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.
How do you sign in to Mailzzy?
No API key is involved. Mailzzy answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.
How fast is Mailzzy?
It answers our handshake in 482 ms on average, which is faster than 27% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Mailzzy open source?
We cannot say either way: 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.