"Proton Mail" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Prepare physical mail and fax quotes, review before payment, and track orders with OAuth.
The agentic layer of letters. Agents send real printed mail worldwide, German compliance built in.
Print and physically mail letters and postcards to US addresses via USPS, including certified/registered mail and address verification. Paid per call in USDC on Base via the x402 protocol, no signup.
Print and mail physical letters and postcards to US postal addresses, plus address verification. Upload PDF/HTML/Markdown/text/DOCX/image documents, get a quote, and pay per call with x402 USDC on Base mainnet or credit card. Supports certified/registered mail with proof of delivery and mail-merge templates.
Multi-rail settlement binder MCP. binder_verify proves integrity only — not settlement.
Validates email syntax and MX records. x402 payment required (testnet USDC).
Print & mail PDF/HTML/Markdown/text/DOCX/images to US addresses; pay per call in x402 USDC on Base.
PaymentOracle — ES256K-signed receipts for x402 payments on USDC+EURC (Base) and XRP+RLUSD (XRPL).
