"Have I Been Pwned" matching MCP connectors:

Emailable MCP — wraps the Emailable email verification API (emailable.com)

send-that-email MCP — wraps StupidAPIs (requires X-API-Key)

Findymail MCP — B2B email finder & reverse-email lookup (findymail.com)

Klaviyo MCP Pack — wraps the Klaviyo API for email marketing

could-have-been-email MCP — wraps StupidAPIs (requires X-API-Key)

ActiveCampaign MCP Pack — email marketing + CRM (API v3).

Mailchimp MCP Pack — manage audiences, campaigns, and members via Mailchimp Marketing API.

Gmail MCP Pack

Postmark MCP.

Hunter.io MCP — wraps the Hunter.io email finder & verification API (hunter.io)

Outlook Mail (Microsoft 365) MCP Pack

Microsoft Exchange MCP server - hosted, multi-user, incl. Exchange on-prem & hybrid (EWS)

Authenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM verified.

Authenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM verified.

MCP server for e-mail testing: create disposable inboxes, wait for delivery, and extract e-mail content or links - all from your AI agent or test automation workflow. Get a free API key on https://app.zyntra.app/

AI email automation, follow-ups, training, previews, and mailbox troubleshooting.

Disposable inboxes for AI agents: create, wait for delivery, and extract email content or links.

AI sales automation for toflow.ai — prospect, enrich, sequence across email, LinkedIn, WhatsApp.