MailTester Email Verification for Claude.ai

com.mailtester/email-verification

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.

client:Claude.ai transport:streamable-http tools:9

Install MailTester Email Verification in Claude.ai

Settings → Connectors → Add custom connector

https://app.mailtester.com/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

get_api_key
get_credit_balance
list_lists
get_list
explain_result
verify_email
verify_batch
estimate_cost
get_batch_status

MailTester Email Verification in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

MailTester Email Verification MCP server