"An MCP server with MCP apps (UI) resources for host testing" matching MCP connectors:

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links.

Email for AI agents: read, search, send, organize, and schedule across your inboxes.

Your unified inbox — everything that reaches you, understood and actionable from your AI assistant.

Teaches AI to write HTML email that renders in Outlook, Gmail, and Apple Mail. 19 rules, 6 comps.

DMARC analytics for AI assistants — domain health, SPF/DKIM records, compliance stats, anomalies.

Agent-run cold-email infra: 21 MCP tools, live sending, free sandbox. $99/mo, concierge go-live.

Let ChatGPT, Claude & Cursor use your Mac: email, calendar, iMessage, Teams, files. Local, free.

DNS and email security scanner with 80 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.

Keyless email checks: disposable, role, and free-provider detection, MX, and typo suggestions.

Email verification for AI agents — verify, clean & validate emails; self-onboard + crypto pay

Email compatibility analysis across 15 clients — preview, audit, fix, diff, deliverability.

Domain intel for AI agents: RDAP registration, DNS, email deliverability, tech stack.

Internet identity for AI agents: register or broker domains, email, DNS - pay by card or USDC.

Check email deliverability for a domain: MX, SPF, DKIM, DMARC, blacklists. Graded, no key.

Cameron Rye's blog, projects, resume, and live site stats, plus contact and newsletter tools.

Email for AI agents: send mail, manage contacts, automations & webhooks. Zero-DNS first send.

PDF, photo, email, and file comparison evidence checks with plain-language reports.

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

Email OS for agents - real-inbox search, triage, commitments, and a verifiable BEC hard-stop.

Hosted email for AI agents: create inboxes, send, receive, and reply over MCP with scoped API keys