Observed arrival · 2026-10-25
notecardHQ turns API events into real-pen mail
An API and portal for turning product events into handwritten cards mailed to their recipients.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Product teams automating customer milestones and thank-yous
- Worth noticing
- The page says messages are limited to 500 characters; US addresses are checked, while international addresses are mailed as submitted.
Field notes
The documented flow accepts recipient details and a message through a POST endpoint; teams can also queue notes in a portal. Messages become pen strokes, then undergo OCR readback: digits must match exactly, and unclear words are redrawn before a robot writes the card. The page says US addresses are checked before acceptance, while international addresses are mailed as submitted. Each note is trackable from queued through mailed, and the stated message limit is 500 characters.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
⊠LoginAccess appeared gated
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue