Observed arrival · 2026-09-28
Zerowhen lets a watcher sleep between events
A developer service for running small shell-script watchers that wait for a change, then act or notify.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers automating event-triggered checks
- Worth noticing
- A parked watcher is described as using about 100 KiB, with no process, thread, or socket while waiting.
Field notes
The page lists command line, HTTPS API, and MCP as deployment routes. It says a watcher sees only its URL, selector, condition, and fetched pages; an AI check sees only what changed, and its model gets no tools. Zerowhen describes the service as in private testing.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
⊠LoginAccess appeared gated
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue