sendmux-sdk

by Sendmux · Productivity · ★ 62

sendmux-sdk is an MCP server by Sendmux. Official monorepo of SDKs, CLI, and MCP servers for Sendmux email APIs across TypeScript, Python, Go, PHP, Rust, and Ruby. It has 62 GitHub stars and ranks #316 of 1809 in Productivity by stars.

Category: Productivity
Author: Sendmux
GitHub stars: 62
This week: Tracking since 18 Oct 2026
Language: PHP
License: MIT (open source)
Last update: 2026-10-14 (10 days ago)
Links: Source Website PyPI

cli
cli-tool
email
email-automation
email-marketing
inbox
inbox-automation
mcp
mcp-server
mcp-tools
sdk
sdk-go
+3 more

How to install sendmux-sdk

sendmux-sdk is published on PyPI as sendmux-mcp, and it is listed in the official MCP Registry. These steps assume it runs as a local stdio server, which is the usual setup.

Check the README. Confirm the start command and note any API keys or environment variables it needs (pass them with -e KEY=value or an env block). You need uv for uvx.

Add it to Claude Code from a terminal:

claude mcp add sendmux-sdk -- uvx sendmux-mcp

Or add it to Cursor or Claude Desktop in .cursor/mcp.json or claude_desktop_config.json:

{
  "mcpServers": {
    "sendmux-sdk": {
      "command": "uvx",
      "args": [
        "sendmux-mcp"
      ]
    }
  }
}

Restart the client and check it. Run claude mcp list, or open the client's MCP settings, and confirm sendmux-sdk and its tools are listed. The install guide covers VS Code and Codex.

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Maintain this project? Get it featured ($99/mo, pinned at the top of Productivity) or see what featuring includes.

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Frequently asked questions

What is sendmux-sdk?

sendmux-sdk is an MCP server by Sendmux in the Productivity category. Official monorepo of SDKs, CLI, and MCP servers for Sendmux email APIs across TypeScript, Python, Go, PHP, Rust, and Ruby. It has 62 GitHub stars and ranks #316 of 1809 in Productivity by stars. It is written in PHP. It is licensed under MIT. It was last updated 10 days ago.

Is sendmux-sdk free and open source?

Yes. sendmux-sdk is published under the MIT license, so you can run, modify and self-host it at no cost. If it connects to a paid service, that service's own pricing and API terms still apply. Check the repository for the exact license text before using it commercially.

What are the alternatives to sendmux-sdk?

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