How does PageSourceSearch know what four-leaf.ai is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of four-leaf.ai go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from four-leaf.ai?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as four-leaf.ai?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

four-leaf.ai

Built with @clerk/clerk-js 6.33.0, @clerk/ui 1.34.0, dashjs 5.2.1, posthog-js 1.434.12, @marimo-team/frontend 0.25.0, @inkeep/cxkit-js 0.5.119, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0, jspdf 4.2.1, pdf-lib 1.17.1, cloudflare-insights, pdfmake 0.3.11 and more. 5 pages and 201 stored files, last crawled 2026-10-05.

rank 49,961,139 36 libraries 0 identifiers 35 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
@clerk/clerk-js	6.33.0	2026-10-05
@clerk/ui	1.34.0	2026-10-05
dashjs	5.2.1	2026-10-05
posthog-js	1.434.12	2026-10-05
@marimo-team/frontend	0.25.0	2026-10-05
@inkeep/cxkit-js	0.5.119	2026-10-05
@reachfive/identity-core	1.42.0	2026-10-05
@reachfive/identity-ui	2.1.0	2026-10-05
jspdf	4.2.1	2026-10-05
pdf-lib	1.17.1	2026-10-05
cloudflare-insights		2026-10-05
pdfmake	0.3.11	2026-10-05
cloudflare-email-decode		2026-10-05
spectorjs	0.9.33	2026-10-05
@moveo-ai/web-client	0.117.0	2026-10-05
@elevenlabs/convai-widget-embed	0.18.2	2026-10-05
ovenplayer	0.10.54	2026-10-05
graphql-playground-react	1.7.28	2026-10-05
@recogito/annotorious	2.7.14	2026-10-05
pdfmake-rtl	2.1.2	2026-10-05
tailwind-merge	3.7.0	2026-10-05
@shikijs/langs	4.4.3	2026-10-05
@teipublisher/pb-components	3.6.8	2026-10-05
dmn-js	17.12.0	2026-10-05
@ant-design/x	2.9.0	2026-10-05
@pierre/diffs	1.5.1	2026-10-05
mori-chat-widget	2.0.49	2026-10-05
@waniwani/sdk	0.21.3	2026-10-05
@formbird/angular-elements	8.5.10	2026-10-05
wonder-image	2.1.2-alpha.4	2026-10-05
@joyfill/components	4.0.0-rc26	2026-10-05
@grapecity/spread-sheets-pdf	18.2.5	2026-10-05
devexpress-richedit	26.1.5	2026-10-05
sonner	2.0.8	2026-10-05
@pydantic/ai-chat-ui	2.3.0	2026-10-05
amcharts3	3.21.15	2026-10-05

Tracking, tag and verification IDs

No analytics property, tag manager container, pixel or site-verification token was found in the stored source.

Third-party hosts

Hosts outside four-leaf.ai that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
api.producthunt.com	connect	view source
app.posthog.com	connect	view source
bsky.app	connect	view source
github.com	connect	view source
i.ytimg.com	connect	view source
media.theresanaiforthat.com	connect	view source
ns.adobe.com	connect	view source
purl.org	connect	view source
qebbwvphiwynwiceimow.supabase.co	connect	view source
react.dev	connect	view source
sentry.io	connect	view source
static.cloudflareinsights.com	script	view source
submitaitools.org	connect	view source
substack.com	connect	view source
theresanaiforthat.com	connect	view source
tools.cafe	connect	view source
us.i.posthog.com	connect	view source
us.posthog.com	connect	view source
vercel.live	connect	view source
www.aiim.org	connect	view source
www.capterra.com	connect	view source
www.facebook.com	connect	view source
www.googletagmanager.com	connect	view source
www.instagram.com	connect	view source
www.linkedin.com	connect	view source
www.listbulb.com	connect	view source
www.producthunt.com	connect	view source
www.reddit.com	connect	view source
www.threads.com	connect	view source
www.tiktok.com	connect	view source
www.trustpilot.com	connect	view source
www.w3.org	connect	view source
www.youtube-nocookie.com	connect	view source
www.youtube.com	connect	view source
yandex.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 201) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

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Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-05 first crawl

5 pages, 201 files, 11.2 MB; 36 libraries, 0 identifiers, 35 third-party hosts
36 libraries added
- cloudflare-email-decode
- @ant-design/x 2.9.0
- @inkeep/cxkit-js 0.5.119
- @clerk/ui 1.34.0
- @moveo-ai/web-client 0.117.0
- @joyfill/components 4.0.0-rc26
- mori-chat-widget 2.0.49
- spectorjs 0.9.33
- posthog-js 1.434.12
- tailwind-merge 3.7.0
- @marimo-team/frontend 0.25.0
- sonner 2.0.8
- and 24 more
35 third-party hosts added
201 files added

Questions about four-leaf.ai

How does PageSourceSearch know what four-leaf.ai is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of four-leaf.ai go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from four-leaf.ai?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as four-leaf.ai?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.