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MepMail MCP Server

answering

MepMail is answering right now. Last checked 9 min ago. 383 installs a week from npm. Last commit 11 Oct 2026.

Transactional email and agent mailboxes: send, broadcasts, domains, Correio inboxes.

Installs per day peak 298 · avg 30 · +71% w/w
a month agotoday
Uptime history 14 days of history · worst day 98%
14 days agonow
100.0%
Uptime 24h
276 of 276 checks
—
Tools
hidden behind auth
217 ms
Response time
average over 24h
383
Installs / week
npm and PyPI

What the code does

We read the source, 3 h ago · rules ccca72095570

Evidence

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

Decodes a string and executes it apps/web/src/server/mailbox-content.ts:554
    /^([0-9]{1,17})\.([0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})$/.exec(
      Buffer.from(cursor, "base64url").toString("utf8"),
Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

  const relative = RELATIVE_RE.exec(input.trim());
Sends data to a third-party sink packages/core/src/webhook-channels.ts:28
  if (host === "hooks.slack.com") return "slack";

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

We found things in this code

Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch MepMail and you get told the day something new turns up.

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 9 min ago.

run in your terminal
claude mcp add mepmail --transport http https://api-mepmail.je4ndev.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mepmail": {
      "url": "https://api-mepmail.je4ndev.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mepmail]
url = "https://api-mepmail.je4ndev.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mepmail": {
      "url": "https://api-mepmail.je4ndev.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mepmail": {
      "url": "https://api-mepmail.je4ndev.com/mcp"
    }
  }
}

This one needs environment variables set before it will start: MEPMAIL_API_KEY (MepMail API key, for sending email (optional when only Correio is used)), MEPMAIL_MAIL_TOKEN (Correio agent key (mmb_ or mmt_), for mailboxes (optional when only sending)). The author declared them in the registry entry; get the values from the project itself.

This endpoint answered with an authorization challenge. The server is running, but you need an API key from its owner to call it.

This server publishes 2 more addresses. The block above uses the one we reach during checks; the full list is under Endpoints below, and the author may intend a particular one for your client.

Endpoints

URLTransportStateLatencyChecked
https://api-mepmail.je4ndev.com/mcp streamable-http sign-in 268 ms 9 min ago
https://api.mepmail.dev/mcp streamable-http sign-in 243 ms 9 min ago
https://api.mepmail.dev/mcp/correio streamable-http needs key 172 ms 9 min ago

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MepMail — questions

Answers built from our own checks of this server.

Why is there no tool list for MepMail?
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 MepMail working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 276 of 276 checks got a reply (100.0%), average response time 217 ms. The bar chart above shows every period we have measured.
How do I connect MepMail?
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 will need your own key: it refuses anonymous clients.
Does MepMail need an API key?
Yes. Every time we knock, MepMail answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.
How fast is MepMail?
It answers our handshake in 217 ms on average, which is faster than 60% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use MepMail?
The npm package @mepmail/mcp was installed 383 times in the last week. Week over week that is +71%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is MepMail open source?
Yes — it is published under the MIT licence, written in TypeScript, 0 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.