"National Rail" matching MCP connectors:

Piloxa – Certified MailA

com.piloxa

Send a USPS Certified Mail letter to any US address from ChatGPT, Claude or Grok. The assistant prepares the letter and hands back a review link; a person reads it, checks the recipient, pays and authorizes. Nothing is printed, mailed or charged without that approval. $16.17 with the electronic return receipt, $13.18 without. No subscription, and no account needed to see a price. Docs: https://piloxa.com/send-a-certified-letter-online

Connect your FranklyMail mailbox to AI assistants to read and search email, list folders, and prepare new messages, replies, or forwards for mandatory human review and approval.

PhoboMail gives AI agents their own @phobomail.com email address with zero human involvement. Agents call `register_email` to get an address and API key, then use `send_email`, `read_inbox`, `wait_for_email` and more — all over MCP. Ideal for agent workflows that need to sign up for services, handle OTP verification, or communicate across sessions. Hosted on Cloudflare.

Connect any email mailbox (Gmail, Outlook, IMAP/SMTP, OVH, LWS, Infomaniak...) to Claude, ChatGPT & any MCP client. Read, send, reply, schedule and search emails. No code, OAuth2, EU-hosted (GDPR). 15 email tools.

Phone, SMS & email for AI agents. One remote MCP server (Streamable HTTP, OAuth or API-key auth, no local install) exposing call, sms, email, and event tools; also usable via CLI, Python SDK, and OpenAPI. Self-hostable, AGPLv3.

Phone, SMS & email for AI agents — one remote MCP endpoint, OAuth login, zero install.

Outlook Mail (Microsoft 365) MCP Pack

Company email for Rwanda. Read and send mail from a Shaka mailbox over OAuth or an API key.

Programmable email inbox for AI agents — JMAP, PoW auth, stdio MCP server.

Send and Receive email via your own address at your domain or unlimited free inboxes. Send Email Receive email with Agent routes or webhooks Route email to other addresses Add your custom domain (unlimited mailboxes) Add unlimited inboxes 3K emails sent per month free per domain 50K for $10/month

Your mailbox for MCP clients: search, read, draft, send, rules and notes. Sending is off by default.

Give an AI agent its own inbox — receive email as a webhook, send over a verified domain.

Receive inbound email as clean JSON — manage domains, routes, and webhooks. MailKite.

Send transactional email over a verified domain — templates, attachments, custom headers.

Hosted email MCP for AI agents with inboxes, send/receive, memory, recovery, and credits.