"Proton Mail" matching MCP servers:

MCP server that lets AI agents create reviewable physical mail drafts, validate quotes, and pay for postage via MPP or x402 protocols.

A Model Context Protocol server that enables LLMs to interact with the Lob.com API for address verification and sending physical mail. It provides 76 tools across 12 resource groups including postcards, letters, checks, and templates with built-in safety features for production use.

Enables sending letters and MICR-encoded checks, managing contacts and templates, and verifying US/Canadian addresses via the PostGrid Print & Mail and Address Verification APIs from Claude.

MCP server for MAIB e-commerce payments (Moldova). Supports payments, refunds, recurring billing, one-click payments, and transaction status via OAuth 2.0.

Enables AI agents to manage MONA Cloud resources such as VPS and databases, use a shared VND wallet, integrate MONA Pay payments, and send transactional email via MONA Mail, all through natural language in MCP-compatible clients.

Enables sending transactional emails with text or HTML body, delivery status, and message ID via Resend. Pay-per-call using x402 micropayments (USDC on Base L2), no API key or signup required.

An open-source MCP server for sending physical mail (letters, postcards, certified mail) directly from AI agents, with per-piece payment and no account signup needed.

Enables AI agents to purchase UK shipping labels (Royal Mail Tracked 24/48 and more) via Shippo API, with automatic cheapest-rate selection, tracking, and refunds—no Royal Mail contract required.

Enables AI agents to create and manage kankan.email mailboxes, send and receive emails, renew mailboxes, and handle order payments and status queries through MCP tools.