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mcp/harbor
Claude Code

MailboxValidator for Claude Code

io.github.mailboxvalidator/mcp-mailboxvalidator

Email validation MCP server using the MailboxValidator API. It can validate email addresses.

client:Claude Code transport:stdio runtime:npm

Install MailboxValidator in Claude Code

run in your project directory

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

claude mcp add mcp-mailboxvalidator -e MAILBOXVALIDATOR_API_KEY=<MAILBOXVALIDATOR_API_KEY> -- npx -y mcp-mailboxvalidator

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

MailboxValidator in other clients

MailboxValidator MCP server