Is io.github.smtping/smtping-mcp safe to use?

io.github.smtping/smtping-mcp has no known CVEs as of the latest MCPpedia security scan. It requires authentication to connect, which limits unauthorized access. Licensed under MIT.

How do I install io.github.smtping/smtping-mcp?

io.github.smtping/smtping-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.smtping/smtping-mcp do?

io.github.smtping/smtping-mcp provides 6 tools: Tools, Setup, Cursor, Windows, Privacy and 1 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.smtping/smtping-mcp?

io.github.smtping/smtping-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is io.github.smtping/smtping-mcp actively maintained?

io.github.smtping/smtping-mcp is actively maintained - last commit was 17 days ago. It has 2 GitHub stars.

io.github.smtping/smtping-mcp

@smtping/mcp

Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists.

2 51/wk 6 tools GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 17d ago

Works with most clients

Transport: stdio, sse, http

6 tools · ~248 tok

Grade A · 0.1% of 200K ctx

MCPpedia last refreshed this data 1d ago

Edit this pageView history

io.github.smtping/smtping-mcp is an MCP server that verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 85/100 on MCPpedia's security, maintenance and efficiency rubric.

Communication

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "smtping": {
      "env": {
        "SMTPING_API_KEY": "sk_live_your_key_here"
      },
      "args": [
        "-y",
        "@smtping/mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

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[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-smtping-smtping-mcp)](https://mcppedia.org/s/io-github-smtping-smtping-mcp)

Read me

What io.github.smtping/smtping-mcp does

Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @smtping/mcp against OSV.dev.

Inventory

Tools (6)

Click any tool to inspect its schema.

~248 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.smtping/smtping-mcp safe to use?: io.github.smtping/smtping-mcp has no known CVEs as of the latest MCPpedia security scan. It requires authentication to connect, which limits unauthorized access. Licensed under MIT.
How do I install io.github.smtping/smtping-mcp?: io.github.smtping/smtping-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.smtping/smtping-mcp do?: io.github.smtping/smtping-mcp provides 6 tools: Tools, Setup, Cursor, Windows, Privacy and 1 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.smtping/smtping-mcp?: io.github.smtping/smtping-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.smtping/smtping-mcp actively maintained?: io.github.smtping/smtping-mcp is actively maintained - last commit was 17 days ago. It has 2 GitHub stars.

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Community

Discussion

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Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Communication

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "smtping": {
      "env": {
        "SMTPING_API_KEY": "sk_live_your_key_here"
      },
      "args": [
        "-y",
        "@smtping/mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-smtping-smtping-mcp)](https://mcppedia.org/s/io-github-smtping-smtping-mcp)

Read me

What io.github.smtping/smtping-mcp does

Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

README

SMTPing MCP server

Official Model Context Protocol server for SMTPing. It lets Claude, Cursor, VS Code, Windsurf and any MCP client verify email addresses in a conversation.

"Verify these 40 leads and tell me which ones are safe to email."

Remote server (no install)

Prefer not to run Node? Add https://mcp.smtping.com/mcp as a custom connector in Claude (Settings > Connectors) or ChatGPT, then sign in with your SMTPing API key. Same 5 tools, OAuth 2.1, nothing stored on the server. Source: smtping/smtping-mcp-remote.

Tools

tool	what it does	credits
`verify_email`	Verifies one address: status plus band (safe, avoid, judgement)	1
`verify_list`	Verifies a list as one bulk job (up to 100,000), waits for results	1 per unique address
`get_bulk_job`	Progress and results of a bulk job	0
`check_threat`	Looks up one address in the spamtrap, disposable, spambot or complainer list	1
`get_credits`	Remaining credits and plan	0

Setup

Create an API key in the SMTPing dashboard, then add the server to your client. Node 18 or later is required.

Claude Desktop

Settings > Developer > Edit Config, then add to claude_desktop_config.json:

{
  "mcpServers": {
    "smtping": {
      "command": "npx",
      "args": ["-y", "@smtping/mcp"],
      "env": { "SMTPING_API_KEY": "sk_live_your_key_here" }
    }
  }
}

Restart Claude Desktop.

Claude Code

claude mcp add smtping -e SMTPING_API_KEY=sk_live_your_key_here -- npx -y @smtping/mcp

Cursor

~/.cursor/mcp.json (or .cursor/mcp.json in a project): same JSON block as Claude Desktop.

VS Code

.vscode/mcp.json:

{
  "servers": {
    "smtping": {
      "command": "npx",
      "args": ["-y", "@smtping/mcp"],
      "env": { "SMTPING_API_KEY": "sk_live_your_key_here" }
    }
  }
}

Windows troubleshooting

npx is not found: use "command": "cmd" and "args": ["/c", "npx", "-y", "@smtping/mcp"].

"Request timed out" or "Server disconnected" on first start: the first npx run downloads the package and can take longer than the client's 60 second startup limit. Install the server once, then point the client to it:

In a terminal: npm install -g @smtping/mcp
Replace the smtping block with:

"smtping": {
  "command": "node",
  "args": ["C:\\Users\\YOUR_NAME\\AppData\\Roaming\\npm\\node_modules\\@smtping\\mcp\\index.js"],
  "env": { "SMTPING_API_KEY": "sk_live_your_key_here" }
}

Replace YOUR_NAME with your Windows user folder (spaces are fine) and use double backslashes. Run echo %APPDATA% to see the exact path. This form also avoids issues with .cmd launchers when the user folder contains a space.

Quit the client completely (tray icon > Quit) and reopen it.

To update later: npm install -g @smtping/mcp@latest.

Logs: Claude Desktop writes them to %APPDATA%\Claude\logs\mcp-server-smtping.log.

Privacy

Addresses are sent to the SMTPing API only when a tool is called. See the privacy policy.

Links

MIT License

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @smtping/mcp against OSV.dev.

Inventory

Tools (6)

Click any tool to inspect its schema.

~248 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.smtping/smtping-mcp safe to use?: io.github.smtping/smtping-mcp has no known CVEs as of the latest MCPpedia security scan. It requires authentication to connect, which limits unauthorized access. Licensed under MIT.
How do I install io.github.smtping/smtping-mcp?: io.github.smtping/smtping-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.smtping/smtping-mcp do?: io.github.smtping/smtping-mcp provides 6 tools: Tools, Setup, Cursor, Windows, Privacy and 1 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.smtping/smtping-mcp?: io.github.smtping/smtping-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.smtping/smtping-mcp actively maintained?: io.github.smtping/smtping-mcp is actively maintained - last commit was 17 days ago. It has 2 GitHub stars.

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MCP Security Weekly

Get CVE alerts and security updates for io.github.smtping/smtping-mcp and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?