SMTPing Email Verification

io.github.smtping

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

Add to Cursor Add to VS Code Run on PlugMCP

1{2  "mcpServers": {3    "io.github.smtping-smtping-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "@smtping/[email protected]"8      ],9      "env": {10        "SMTPING_API_KEY": "<secret>"11      }12    }13  }14}

.cursor/mcp.jsonMCP server

Transport: stdio
Status: Local

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

npx -y @smtping/[email protected]

Credentials from the publisher

SMTPING_API_KEY — Your SMTPing API key, from https://app.smtping.com

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1SMTPING_API_KEY=<secret> claude mcp add io.github.smtping-smtping-mcp -- npx -y @smtping/mcp@1.0.0

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.github.smtping-smtping-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "@smtping/[email protected]"8      ],9      "env": {10        "SMTPING_API_KEY": "<secret>"11      }12    }13  }14}

claude_desktop_config.json

Local · npmPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 1.0.0
API key: SMTPING_API_KEY
Last checked: 2026-10-27

Stars: —
Tools: —
Uptime: —

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

How do I install SMTPing Email Verification?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does SMTPing Email Verification need an API key?

The publisher lists these environment variables: SMTPING_API_KEY.

What transport does SMTPing Email Verification use?

SMTPing Email Verification runs locally over stdio.

When was SMTPing Email Verification last checked?

Last checked 2026-10-27. Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists.

From the publisher

Documentation

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

SMTPing Email Verification

io.github.smtping

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

Communication

Add to Cursor Add to VS Code Run on PlugMCP

GitHub npm Website

Add to Cursor Add to VS Code Run on PlugMCP

1{2  "mcpServers": {3    "io.github.smtping-smtping-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "@smtping/[email protected]"8      ],9      "env": {10        "SMTPING_API_KEY": "<secret>"11      }12    }13  }14}

.cursor/mcp.jsonMCP server

Transport: stdio
Status: Local

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

npx -y @smtping/[email protected]

Credentials from the publisher

SMTPING_API_KEY — Your SMTPing API key, from https://app.smtping.com

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1SMTPING_API_KEY=<secret> claude mcp add io.github.smtping-smtping-mcp -- npx -y @smtping/mcp@1.0.0

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.github.smtping-smtping-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "@smtping/[email protected]"8      ],9      "env": {10        "SMTPING_API_KEY": "<secret>"11      }12    }13  }14}

claude_desktop_config.json

Local · npmPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 1.0.0
API key: SMTPING_API_KEY
Last checked: 2026-10-27

Stars: —
Tools: —
Uptime: —

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

How do I install SMTPing Email Verification?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does SMTPing Email Verification need an API key?

The publisher lists these environment variables: SMTPING_API_KEY.

What transport does SMTPing Email Verification use?

SMTPing Email Verification runs locally over stdio.

When was SMTPing Email Verification last checked?

Last checked 2026-10-27. Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists.

From the publisher

Documentation

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)

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"].

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" }
}

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