"USPS" 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

Prepare USPS Certified Mail letters from any AI assistant; a person reviews, pays and authorizes.

Print and mail physical documents in the US via USPS, with quotes, agent payment and tracking.