Observed arrival · 2026-09-21
CardScope: five versions of the same link
A URL-card diagnostic tool that previews how a link will appear on X, LinkedIn, Slack, Discord, and iMessage.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People shipping pages that need reliable social previews
- Worth noticing
- It separates platform behavior: Slack favors Open Graph, Discord leans on twitter:card, and iMessage collapses without og:image.
Field notes
The tool models client-specific unfurl behavior instead of treating social metadata as one universal preview. Its stated workflow uses a size-capped edge fetch, parses tags in memory, and checks image dimensions without storing page HTML. The page distinguishes short-lived operational data—an IP hash for 48 hours and parsed tags for seven days—from the submitted page itself. A future CI API is explicitly outside the current version.
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