How does PageSourceSearch know what resend.com 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 resend.com 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 resend.com?

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 resend.com?

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

resend.com

Built with gtm, @clerk/ui 1.34.0, @tailwindcss/browser 4.3.3, dashjs 5.2.1, @marimo-team/frontend 0.25.0, tinymce 8.9.2, @inkeep/cxkit-js 0.5.119, @feathery/react 2.98.1, onetrust, stripe-js 9.4.0, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0 and more. 5 pages and 202 stored files, last crawled 2026-10-02.

rank 387,891 50 libraries 0 identifiers 117 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
gtm		2026-10-02
@clerk/ui	1.34.0	2026-10-02
@tailwindcss/browser	4.3.3	2026-10-02
dashjs	5.2.1	2026-10-02
@marimo-team/frontend	0.25.0	2026-10-02
tinymce	8.9.2	2026-10-02
@inkeep/cxkit-js	0.5.119	2026-10-02
@feathery/react	2.98.1	2026-10-02
onetrust		2026-10-02
stripe-js	9.4.0	2026-10-02
@reachfive/identity-core	1.42.0	2026-10-02
@reachfive/identity-ui	2.1.0	2026-10-02
jspdf	4.2.1	2026-10-02
cloudflare-turnstile		2026-10-02
@foxy.io/elements	1.54.0	2026-10-02
spectorjs	0.9.33	2026-10-02
@scalar/api-reference	1.72.1	2026-10-02
@moveo-ai/web-client	0.117.0	2026-10-02
@elevenlabs/convai-widget-embed	0.18.2	2026-10-02
@plattar/plattar-ar-adapter	2.8.1	2026-10-02
@recogito/annotorious	2.7.14	2026-10-02
javascript-obfuscator	5.8.0	2026-10-02
@descope/web-components-ui	3.21.0	2026-10-02
tabularjs	1.0.1	2026-10-02
@talkjs/web-components	0.3.9	2026-10-02
@stlite/browser	1.9.2	2026-10-02
@ant-design/x	2.9.0	2026-10-02
@prefecthq/prefab-ui	0.20.2	2026-10-02
mori-chat-widget	2.0.49	2026-10-02
@tsocial/tvweb-sdk	5.38.6	2026-10-02
@isle-project/dll	0.50.65	2026-10-02
@inkeep/agents-ui-js-cloud	0.17.8	2026-10-02
@formbird/angular-elements	8.5.10	2026-10-02
@joyfill/components	4.0.0-rc26	2026-10-02
prometix	1.7.0	2026-10-02
svgo	4.1.0	2026-10-02
@chainlink/cl-search-frontend	0.13.2	2026-10-02
@limetech/lime-elements	40.5.1	2026-10-02
@redvars/peacock	3.9.1	2026-10-02
@wf-financing/ui	5.5.6	2026-10-02
@pydantic/ai-chat-ui	2.3.0	2026-10-02
amcharts3	3.21.15	2026-10-02
tailwindcss	4.3.3	2026-09-24
prismjs	1.30.0	2026-09-24
gather-vue	8.20.3	2026-09-24
@snowplow/browser-plugin-timezone	4.10.2	2026-09-24
tableexport.jquery.plugin	1.33.0	2026-09-24
markmap-lib	0.18.12	2026-09-24
vue3-sfc-loader	0.9.5	2026-09-24
replaywebpage	2.5.3	2026-09-24

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 resend.com 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
aistudio.google.com	connect	view source
api-eu.mixpanel.com	connect	view source
api-in.mixpanel.com	connect	view source
api.github.com	connect	view source
api.mixpanel.com	connect	view source
app.devin.ai	connect	view source
app.mintlify.com	connect	view source
app.posthog.com	connect	view source
base-ui.com	connect	view source
bastardkb.com	connect	view source
briankerr.co	connect	view source
bukinoshita.com	connect	view source
cafeirmaspereira.com.br	connect	view source
cdn.cookielaw.org	connect	view source
cdn.getkoala.com	connect	view source
cdn.heapanalytics.com	connect	view source
cdn.segment.com	connect	view source
challenges.cloudflare.com	connect	view source
chat-assets.frontapp.com	connect	view source
chat.openai.com	connect	view source
chrispennington.dev	connect	view source
christinacodes.dev	connect	view source
claude.ai	connect	view source
coffeesupreme.com	connect	view source
combi-coffee.com	connect	view source
company.com	connect	view source
d27564856iuh93.cloudfront.net	connect	view source
d3gk2c5xim1je2.cloudfront.net	connect	view source
danilowoz.com	connect	view source
dashboard.mintlify.com	connect	view source
deno.land	connect	view source
discord.com	connect	view source
ergodox-ez.com	connect	view source
example.com	connect	view source
felipevolpone.medium.com	connect	view source
fonts.googleapis.com	stylesheet connect	view source
fonts.gstatic.com	connect	view source
fpnpmcdn.net	connect	view source
github.com	connect	view source
grok.com	connect	view source
html.spec.whatwg.org	connect	view source
imbibe.ie	connect	view source
ineffablecoffee.com	connect	view source
ipinfo.io	connect	view source
jonnilundy.com	connect	view source
jopcmelo.com	connect	view source
jpvalery.me	connect	view source
jpvalery.photo	connect	view source
js.hcaptcha.com	connect	view source
js.stripe.com	connect	view source
json-schema.org	connect	view source
kinesis-ergo.com	connect	view source
lacabra.com	connect	view source
leaves.mintlify.com	connect	view source
linkedin.com	connect	view source
loja.badentorrefacao.com.br	connect	view source
loja.encantosdocafe.com.br	connect	view source
medium.com	connect	view source
mintlify.b-cdn.net	connect	view source
mintlify.com	connect	view source
morrowcoffee.com	connect	view source
mullirivjeter.al	connect	view source
nomadcoffee.es	connect	view source
og.jpvalery.me	connect	view source
opencode.ai	connect	view source
ph.mintlify.com	connect	view source
react.dev	connect	view source
react.email	connect	view source
redrabbitcoffee.co.nz	connect	view source
rehanvdm.com	connect	view source
res.cloudinary.com	connect	view source
resend-status.com	connect	view source
safety-briefing.com	connect	view source
sentry.io	connect	view source
shop.coavacoffee.com	connect	view source
store.steampowered.com	connect	view source
tag.clearbitscripts.com	connect	view source
travis-ci.org	connect	view source
us.app.unleash-hosted.com	connect	view source
us.i.posthog.com	connect	view source
us.posthog.com	connect	view source
vcapretz.com	connect	view source
vercel.live	connect	view source
veroo.com.br	connect	view source
worklouder.cc	connect	view source
www.abuelacafes.com.br	connect	view source
www.allpressespresso.com	connect	view source
www.amazon.com.br	connect	view source
www.apple.com	connect	view source
www.aprilcoffeeroasters.com	connect	view source
www.cafecito.com.br	connect	view source
www.clarity.ms	connect	view source
www.doracoffeeroaster.com	connect	view source
www.gloriousgaming.com	connect	view source
www.goodreads.com	connect	view source
www.googletagmanager.com	connect	view source
www.hpshop.co.za	connect	view source
www.ibm.com	connect	view source
www.jopcmelo.com	connect	view source
www.keychron.com	connect	view source
www.leagueoflegends.com	connect	view source
www.lenhacafe.com.br	connect	view source
www.lucasfcosta.com	connect	view source
www.matakanacoffee.co.nz	connect	view source
www.minecraft.net	connect	view source
www.mintlify.com	connect	view source
www.mokaclube.com.br	connect	view source
www.nintendo.com	connect	view source
www.notion.sosenzucoffee.com	connect	view source
www.paulinechin.com	connect	view source
www.perplexity.ai	connect	view source
www.w3.org	connect	view source
www.williamsonscoffee.com	connect	view source
www.youtube.com	connect	view source
www.zsa.io	connect	view source
yandex.com	connect	view source
zenorocha.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 202) }. 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.

File	Kind	Size	Collected	Versions
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js	js library	not fetched	2026-10-02	current
https://challenges.cloudflare.com/turnstile/v0/api.js?render=explicit	js library	not fetched	2026-10-02	current
https://resend.com/docs/_next/static/chunks/0c3515b173a2f121.js	js	212 B	2026-10-02	2026-10-02
https://www.googletagmanager.com/gtm.js?id=	js library	not fetched	2026-10-02	current
https://resend.com/docs/_next/static/chunks/09810e275d6c2289.js	js	365 B	2026-10-02	2026-10-02
https://resend.com/docs/_next/static/chunks/27157a4e0618b678.js	js	365 B	2026-10-02	2026-10-02
https://resend.com/docs/_next/static/RJajscwELoikxQ4miH90c/_ssgManifest.js	js	858 B	2026-10-02	2026-10-02
https://resend.com/docs/_next/static/RJajscwELoikxQ4miH90c/_buildManifest.js	js	423 B	2026-10-02	2026-10-02
https://resend.com/docs/_next/static/chunks/6d55…pl_44yfLsveaXsAai6bivrio3WJqiuM	js	18.5 KB	2026-10-02	2026-10-02
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https://resend.com/docs/_next/static/chunks/935c…pl_44yfLsveaXsAai6bivrio3WJqiuM	js	273.1 KB	2026-10-02	2026-10-02
https://resend.com/docs/_next/static/chunks/6571…pl_44yfLsveaXsAai6bivrio3WJqiuM	js	23.4 KB	2026-10-02	2026-10-02
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https://resend.com/docs/_next/static/chunks/1274…pl_44yfLsveaXsAai6bivrio3WJqiuM	js	26.3 KB	2026-10-02	2026-10-02
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https://resend.com/docs/_next/static/chunks/1878…pl_44yfLsveaXsAai6bivrio3WJqiuM	js	4.5 KB	2026-10-02	2026-10-02
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https://resend.com/docs/_next/static/chunks/3000…pl_44yfLsveaXsAai6bivrio3WJqiuM	js	483.7 KB	2026-10-02	2026-10-02
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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.

2026-10-02 first crawl

5 pages, 128 files, 11.6 MB; 42 libraries, 0 identifiers, 117 third-party hosts
42 libraries added
- mori-chat-widget 2.0.49
- @inkeep/agents-ui-js-cloud 0.17.8
- @clerk/ui 1.34.0
- @ant-design/x 2.9.0
- @wf-financing/ui 5.5.6
- @pydantic/ai-chat-ui 2.3.0
- @scalar/api-reference 1.72.1
- @feathery/react 2.98.1
- @marimo-team/frontend 0.25.0
- @inkeep/cxkit-js 0.5.119
- @elevenlabs/convai-widget-embed 0.18.2
- @redvars/peacock 3.9.1
- and 30 more
118 third-party hosts added
- fonts.googleapis.com
- yandex.com
- sentry.io
- app.posthog.com
- us.i.posthog.com
- us.posthog.com
- d27564856iuh93.cloudfront.net
- react.dev
- json-schema.org
- www.w3.org
- vercel.live
- base-ui.com
- and 106 more
128 files added

Questions about resend.com

How does PageSourceSearch know what resend.com 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 resend.com 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 resend.com?: 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 resend.com?: 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.