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VC Intelligence Report

masterJS

Education — A curated collection of free resources and learning materials for mastering JavaScript and web d…
Educationopen-source
● Verified live
Verdict from HTTP liveness real
last probed Aug 24, 2026
Pulse 40.0 · 1/4
40.0
Pulse Index
1/4 families · real
0.0
30-day Δ
pulse momentum · real
17
HTTP probes
liveness history · real
6
Functional tags
observed attributes · real
Risk read derived from observed signals

Verified live by HTTP probe across 17 observations. Pulse has been flat over the last 30 days. Observation is liveness-only: no tracked press, repository, or traffic rank — existence is confirmed, momentum is unobserved.

HTTP liveness

real
17 probes · Jun 16, 2026Aug 24, 2026aliveredirecteddeadunverified

Signal telemetry

4 families · 1 observed · observed only
Liveness probereal
alive in 100% of 17 probesavg response 874 ms
Developer tractionchecked · none
No public repository linked — GitHub signals are not tracked for this product.
Press & sentimentchecked · none
No coverage found in the tracked press corpus. Absence of press is itself a signal at this stage.
Web footprintreal
resolved host
masterjs.vercel.app
edge
direct origin
server
Vercel
Tranco rank
unranked
Domain age & certificate data not yet collected

Analyst read

generated from the observed metrics above · no external narrative

masterJS's listed site resolved live when we last probed it on Aug 24, 2026, so we mark it verified alive. It has fewer than two observed signal families, so no Pulse Index is composed — the evidence strip shows what is and isn’t present. Observed footprint: 6 functional tags. It has no curated competitive-alternative edges yet, so the comparable set below is functional tag-similarity — read it with the confidence flags.

Comparable set

curated alternatives → functional tag-similarity
CompanyBasisOverlapPulse30d ΔStatus
Open Source Galleryeducationsimilar86%40.0+24.0● live
Gitfoliodev-toolstag-overlap83%0.00.0■ inactive
JS.org Sub-Domains for GitHub Pagesdev-toolstag-overlap83%8.0-8.0— unverified
Hire Juniorseducationsimilar71%40.00.0● live
Gitignore.iodev-toolstag-overlap71%19.70.0→ redirected
FreeCourseseducationsimilar71%40.00.0● live
Request for maintainersdev-toolstag-overlap71%40.00.0● live
Bitcoin Dev Listfinancetag-overlap71%40.00.0● live

Confidence reflects source and category coherence: curated = an editorially linked alternative; similar = strong functional tag-overlap in the same category; tag-overlap = shared tags only and may be noisy. Overlap is the shared functional-tag ratio (Jaccard) for tag-matched rows. Pulse is the observed-activity index real and 30d Δ its signed month change; a dash means insufficient observed history, never zero.

Structure

observed attributes
Business modelopen-source
Liveness tierquiet
Competitive alternativesnone linked
Open sourceNo
Public APINo
Free tierNo
Enterprise tierNo

Funding & team

not in source

No disclosed funding in our sources. Funding data covers only ~1% of the corpus (462 rounds across 79K products), so absence here is unknown, not zero— we don't estimate a number we can't source.

RAW TELEMETRY last 14 probes
PROBEDHTTPORIGIN → RESOLVEDSERVERMSVERDICT
2026-08-24 12:46Z200masterjs.vercel.appVercel546alive
2026-08-11 14:54Z200masterjs.vercel.appVercel216alive
2026-08-11 14:54Z200masterjs.vercel.appVercel688alive
2026-08-09 00:36Z200masterjs.vercel.appVercel2119alive
2026-08-06 12:17Z200masterjs.vercel.appVercel1034alive
2026-07-30 19:43Z200masterjs.vercel.appVercel723alive
2026-07-26 16:24Z200masterjs.vercel.appVercel1423alive
2026-07-18 13:09Z200masterjs.vercel.appVercel2448alive
2026-07-13 10:48Z200masterjs.vercel.appVercel390alive
2026-07-04 15:03Z200masterjs.vercel.appVercel667alive
2026-06-23 15:55Z200masterjs.vercel.appVercel655alive
2026-06-21 18:56Z200masterjs.vercel.appVercel180alive
2026-06-21 18:56Z200masterjs.vercel.appVercel655alive
2026-06-20 09:46Z200masterjs.vercel.appVercel495alive
Full redirect chains, response headers, and DNS records are not captured by the current probe.
Launch Sentinel tear sheet · masterJS · as of 2026-08-28 · launchsentinel.com/reports/masterjs · liveness, pulse and press figures are observed data with provenance shown per panel.