sendmux-sdk

MCP server · npm · ★ 65 · graded 2026-10-19Source linked

Official monorepo of SDKs, CLI, and MCP servers for Sendmux email APIs across TypeScript, Python, Go, PHP, Rust, and Ruby.

No outside reports on file

sendmux-sdk connects to external service APIs; restrict its folder reach, network access, and credentials before installing.

Based on public adoption and transparency signals as of Oct 19, 2026. Our opinion, not a code audit or security guarantee.

Was this verdict for Sendmux Sdk helpful?

What it can access

Local filesNo local folder access notedLOW
Command executionNo shell command runner notedLOW
Network reachConnects to outside service APINOTED
CredentialsNo API token requiredLOW
Package sourcenpm (sendmux-mcp)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

npx -y sendmux-mcp

All setup options ↓

Check this skill Watch it in my stack Compare Add to allowlist README badge View project

About Sendmux Sdk

Sendmux Sdk is an MCP server focused on Developer tools and Communication: Official monorepo of SDKs, CLI, and MCP servers for Sendmux email APIs across TypeScript, Python, Go, PHP, Rust, and Ruby.

It is published on npm as sendmux-mcp and published on PyPI as sendmux-mcp and hosted on GitHub at Sendmux/sendmux-sdk (65 GitHub stars). Based on its public metadata, its operational scope includes: connects to outside service api.

Setup

These use the package this listing points to. Check the project’s own instructions before running anything.

npm command

npx -y sendmux-mcp

PyPI command

uvx sendmux-mcp

PyPI (pip) command

pip install sendmux-mcp

MCP client config

For Claude Desktop (claude_desktop_config.json) or Cursor (.cursor/mcp.json).

json

{
  "mcpServers": {
    "sendmux-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "sendmux-mcp"
      ]
    }
  }
}

Why this grade

CC — Moderate risk signals

Signal-based grade (2/7 points): public source code. This reflects adoption and transparency, not a code review.

Popularity and upkeep

26/100

GitHub stars: 65
Listing last refreshed: 2026-10-29

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Security reports

No reports found for this package in our research (last checked 2026-10-30).

Check a specific version →

Risks to watch for

External API & account scope: Connects to third-party service APIs. Use a dedicated, least-privilege token scoped only to the workspaces or repositories this tool needs.
Dependency & version pinning: Distributed via npm (sendmux-mcp). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.

How to lower the risk

Least-privilege permissions

Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.

Network isolation

Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
If your IT team can, limit which websites and services it is allowed to contact.

Monitoring

Check its activity history or logs weekly at first, and look at what it changed or sent.
Turn on alerts for new logins or unusual usage on any account it connects to.

Red flags to watch for

It asks for more access than its job requires, or prompts you to paste passwords.
It suddenly updates with new owners, or starts contacting unfamiliar websites.

Questions

How do I install Sendmux Sdk?

Run npx -y sendmux-mcp (or uvx sendmux-mcp) in your terminal, or add the server entry to your claude_desktop_config.json or .cursor/mcp.json as shown in the Setup section on this page. Full setup docs and environment variables are in github.com/Sendmux/sendmux-sdk.

Are there security reports about Sendmux Sdk?

No reports found for this package in our research (last checked 2026-10-30). Sendmux Sdk currently holds Grade C (Moderate risk signals) based on public adoption and transparency signals. Review the permissions and source repository before granting access to local files, shell commands, or API keys.

Is Sendmux Sdk actively maintained?

Sendmux Sdk has 65 GitHub stars. Our directory data was last refreshed on 2026-10-29. Check recent commit activity, release tags, and open issues at github.com/Sendmux/sendmux-sdk before pinning it in production.

What are alternatives to Sendmux Sdk?

Compare Sendmux Sdk side by side with similar MCP servers in the Related tools section on this page, or browse all MCP servers on AgentArmorHQ.

Maintain or use Sendmux Sdk? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

AgentArmorHQ Risk Grade C for Sendmux Sdk

GitHub README Markdown:

markdown

[![AgentArmorHQ Risk Grade for Sendmux Sdk](https://agentarmorhq.com/api/badge/sendmux-sendmux-sdk)](https://agentarmorhq.com/skills/sendmux-sendmux-sdk)

HTML embed:

html

<a href="https://agentarmorhq.com/skills/sendmux-sendmux-sdk"><img src="https://agentarmorhq.com/api/badge/sendmux-sendmux-sdk" alt="AgentArmorHQ Risk Grade for Sendmux Sdk" height="20" /></a>

Terminal check:

terminal

curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "sendmux-sendmux-sdk"

Share with your security lead

Need sign-off to use sendmux-sdk? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: sendmux-sdk
- **Listing URL:** https://agentarmorhq.com/skills/sendmux-sendmux-sdk
- **Type:** App connector
- **Risk Grade:** Grade C (Moderate risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 65 GitHub stars

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Connects to outside service API
- **Credentials:** No API token required
- **Package source:** npm (sendmux-mcp)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts sendmux-mcp`
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 19, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type: App connector
Publisher: Sendmux
Source code: github.com/Sendmux/sendmux-sdk
Install command: npm install sendmux-mcp
Est. context load: ~850 tokens / turn (~5 tool schemas, 0.43% of 200k context)
Popularity: 65 GitHub stars
Last updated: 2026-10-29
Last graded: 2026-10-19

Community

Discussions for Sendmux Sdk

Ask questions or share configuration tips. Governed by our Community Rules & Terms.

No posts match this filter yet.

Be the first to ask a question or share a working tip.

Was this listing for Sendmux Sdk helpful?

Check before you install, in Claude

Your assistant answers Block, Review or No known issues for any package before it installs it.

Get this check inside Claude