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."
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
If npx is not found, use "command": "cmd" and "args": ["/c", "npx", "-y", "@smtping/mcp"].
Privacy
Addresses are sent to the SMTPing API only when a tool is called. See the privacy policy.
Links
MIT License
