Courio
Integrations · reviewed listing
Courio prints a PDF (or plain/markdown text) and mails it as a real postal letter: standard, tracked, registered, or registered with proof of delivery, to supported countries worldwide. No account and no API key. The agent gets a free quote, creates the letter, and shows the human a Stripe Checkout link to pay; the letter is mailed right after payment. Tools: get_coverage, quote_letter, send_letter, get_letter_status.
Integrations reviewed 3 opens
Listing owners: outbound opens and referrers are on your private submission status bookmark (the thank-you / status link you saved when you submitted) — open the Analytics tab. That dashboard is only yours; the public page only shows the open count badge.