smails

MCP server · npm · ★ 39 · graded 2026-10-24Source linked

Agent-native disposable email — Cloudflare Workers + Durable Objects, with CLI & MCP. https://smails.dev

No outside reports on file

smails 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 24, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

Local filesNo local folder access notedLOW
Command executionNo shell command runner notedLOW
Network reachConnects to outside service APINOTED
CredentialsRequires API key or tokenREVIEW
Package sourcenpm (@smails/cli)PUBLIC

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

Install

npx -y @smails/cli

All setup options ↓

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About Smails

Smails is an MCP server focused on Developer tools and Communication: Agent-native disposable email — Cloudflare Workers + Durable Objects, with CLI & MCP. https://smails.dev (opens external site).

It is published on npm as @smails/cli and hosted on GitHub at pexni/smails (39 GitHub stars). Based on its public metadata, its operational scope includes: connects to outside service api.

Setup

Check these steps against the project’s own instructions before running anything.

Run @smails/cli with --ignore-scripts in claude_desktop_config.json or .cursor/mcp.json:

json

{
  "mcpServers": {
    "cli": {
      "command": "npx",
      "args": ["-y", "--ignore-scripts", "@smails/cli"]
    }
  }
}

Why this grade

CC — Moderate risk signals

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

Popularity and upkeep

27/100

GitHub stars: 39
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 2026-10-29).

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 (@smails/cli). 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 Smails?

Run npx -y @smails/cli 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/pexni/smails.

Are there security reports about Smails?

No reports found for this package in our research (last checked 2026-10-29). Smails currently holds Grade C (Moderate risk signals) based on public adoption and transparency signals. Key risk areas to watch include external api & account scope:, dependency & version pinning:.

Is Smails actively maintained?

Smails has 39 GitHub stars. Our directory data was last refreshed on 2026-10-29. Check recent commit activity, release tags, and open issues at github.com/pexni/smails before pinning it in production.

What are alternatives to Smails?

Compare Smails 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 Smails? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

GitHub README Markdown:

markdown

[![AgentArmorHQ Risk Grade for Smails](https://agentarmorhq.com/api/badge/pexni-smails)](https://agentarmorhq.com/skills/pexni-smails)

HTML embed:

html

<a href="https://agentarmorhq.com/skills/pexni-smails"><img src="https://agentarmorhq.com/api/badge/pexni-smails" alt="AgentArmorHQ Risk Grade for Smails" height="20" /></a>

Terminal check:

terminal

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

Share with your security lead

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

### AgentArmorHQ Security Review Memo: smails
- **Listing URL:** https://agentarmorhq.com/skills/pexni-smails
- **Type:** App connector
- **Risk Grade:** Grade C (Moderate risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 39 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:** Requires API key or token
- **Package source:** npm (@smails/cli)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts @smails/cli`
- **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 24, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type: App connector
Publisher: pexni
Source code: github.com/pexni/smails
Install command: npm install @smails/cli
Est. context load: ~550 tokens / turn (~3 tool schemas, 0.27% of 200k context)
Popularity: 39 GitHub stars
Last updated: 2026-10-29
Last graded: 2026-10-24

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