mcpbeat

Email Inbox API + Sending by Sendmux MCP Server

io.github.Sendmux/sendmux-mcp
answering

Email Inbox API + Sending by Sendmux is answering right now. Last checked 1 min ago. 319 installs a week from pypi. Last commit 30 Jul 2026.

AI email inbox and sending tools with attachments, search, live events, and webhooks.

Installs per day peak 559 · avg 72 · -28% w/w
a month agotoday
Uptime history 41 hours of history
41 hours agonow
100.0%
Uptime 24h
92 of 92 checks
—
Tools
hidden behind auth
144 ms
Response time
average over 24h
319
Installs / week
npm and PyPI

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

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

This endpoint answered with an authorization challenge — the server is running, but you need an API key or OAuth to use it.

Endpoints

URLTransportStateLatencyChecked
https://mcp.sendmux.ai/mcp streamable-http needs key 146 ms 1 min ago

Email Inbox API + Sending by Sendmux — questions

Answers built from our own checks of this server.

Why is there no tool list for Email Inbox API + Sending by Sendmux?
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 Email Inbox API + Sending by Sendmux working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 144 ms. The bar chart above shows every period we have measured.
How do I connect Email Inbox API + Sending by Sendmux?
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 or an OAuth login: it refuses anonymous clients.
Does Email Inbox API + Sending by Sendmux need an API key?
Yes. Every time we knock, Email Inbox API + Sending by Sendmux 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 Email Inbox API + Sending by Sendmux?
It answers our handshake in 144 ms on average, which is faster than 75% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Email Inbox API + Sending by Sendmux?
The pypi package sendmux-mcp was installed 319 times in the last week. Week over week that is -28%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Email Inbox API + Sending by Sendmux open source?
Yes — it is published under the MIT licence, written in PHP, 86 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.