Official SMTPing Email Verification MCP server: let Claude, Cursor, VS Code and other AI assistants verify email addresses and clean lists.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add smtping-email-verification --env SMTPING_API_KEY='<SMTPING_API_KEY>' -- npx -y @smtping/mcp~/.codex/config.toml
[mcp_servers.smtping-email-verification]
command = "npx"
args = ["-y", "@smtping/mcp"]
env = { SMTPING_API_KEY = "<SMTPING_API_KEY>" }
# codex mcp add smtping-email-verification --env SMTPING_API_KEY='<SMTPING_API_KEY>' -- npx -y @smtping/mcp~/.cursor/mcp.json
{
"mcpServers": {
"smtping-email-verification": {
"command": "npx",
"args": [
"-y",
"@smtping/mcp"
],
"env": {
"SMTPING_API_KEY": "<SMTPING_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"smtping-email-verification": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@smtping/mcp"
],
"env": {
"SMTPING_API_KEY": "<SMTPING_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"smtping-email-verification": {
"command": "npx",
"args": [
"-y",
"@smtping/mcp"
],
"env": {
"SMTPING_API_KEY": "<SMTPING_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"smtping-email-verification": {
"command": "npx",
"args": [
"-y",
"@smtping/mcp"
],
"env": {
"SMTPING_API_KEY": "<SMTPING_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"smtping-email-verification": {
"command": "npx",
"args": [
"-y",
"@smtping/mcp"
],
"env": {
"SMTPING_API_KEY": "<SMTPING_API_KEY>"
}
}
}
}Environment variables
SMTPING_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.