Install MailboxValidator in Claude Code
claude mcp add mailboxvalidator -e MAILBOXVALIDATOR_API_KEY=... -- npx -y mcp-mailboxvalidator{
"mcpServers": {
"mailboxvalidator": {
"command": "npx",
"args": [
"-y",
"mcp-mailboxvalidator"
],
"env": {
"MAILBOXVALIDATOR_API_KEY": "..."
}
}
}
}Replace each ... with your own value.
Frequently asked questions
What does the MailboxValidator MCP server do?
Validates email addresses to reduce bounces in marketing campaigns.
Is the MailboxValidator MCP server free?
The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.
Does MailboxValidator run locally or remotely?
Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.
How do I add MailboxValidator to Claude Code?
Run: claude mcp add mailboxvalidator -e MAILBOXVALIDATOR_API_KEY=... -- npx -y mcp-mailboxvalidator
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