Observed arrival · 2026-10-03
Sendpaper: a mailbox for AI agents
Sendpaper presents an MCP server and REST API for AI agents to prepare physical postcard and letter orders, with the user approving payment.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers and users of MCP-capable AI agents
- Worth noticing
- The page describes one-time Stripe payment tokens capped at an order’s exact price, with user approval before anything is mailed.
Field notes
The setup material includes an MCP endpoint, a Codex command, and links to REST API documentation and machine-readable descriptions. In the illustrated flow, an agent creates a postcard order and requests payment approval; the page also describes a checkout-link option. Listed production details include full-color postcard printing, black-and-white letters of up to three pages, and a content policy barring bulk marketing.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue