← Analyze a URL · Tested sites

www.quizlet.com

Report from 8/8/2026, 10:52:16 AM https://www.quizlet.com
Latest run · lab, cold cache
27
8/8/2026
28-day score · p75 · the standard
29
14 runs
CRR6%latest
SSD44%latest
TC200 toklatest
TTFUT15 ms28-day p75

Scored by v3 · source-of-truth hashes: score db860d6ac94e · thresholds e94f8b33e500 — verifiable against the canonical scorer.

The 28-day score is the p75 of nightly runs — the stable number to cite. Deterministic metrics (CRR/SSD/TC) show their latest value (they move only when the site changes); timing (TTFUT) and answer-fidelity (AF) are smoothed by 28-day p75 — the same lab-vs-field split Core Web Vitals uses. Synthetic daily measurement, not real-user field data.

Core Agent Vitals badge  Embed this badge

Show your agent-readiness score anywhere — it links back to this report.

[![Core Agent Vitals](https://agentvitals.dev/badge/quizlet.com.svg)](https://agentvitals.dev/results?url=https%3A%2F%2Fwww.quizlet.com)
<a href="https://agentvitals.dev/results?url=https%3A%2F%2Fwww.quizlet.com"><img src="https://agentvitals.dev/badge/quizlet.com.svg" alt="Core Agent Vitals" height="20"></a>
What AI tells your customers about youAgent confidence: LOW
🟡Business nameCaptcha Challenge… · guessed from page text (no structured data)
❌Categorynot found
➖Pricenot applicable · not applicable to this page type
➖Locationnot applicable · not applicable to this page type
➖Hoursnot applicable · not applicable to this page type
➖Productsnot applicable · not applicable to this page type
❌Descriptionnot found

An agent is likely to fabricate missing details rather than say “I don’t know”. 0/3 applicable facts come from machine-readable structured data.

DesktopMobile
27
Overall score
weighted CAV (0–100)
FAIL
0–4950–8990–100

Metrics

6%
CRR Content Recovery Poor
0.44
SSD Semantic Signal Density Needs work
200 tok
TC Token Cost Good
10 ms
TTFUT Time to First Useful Token N/A

Token Cost breakdown

Where the page's tokens go (≈2,329 across regions). 67% is non-content — chrome and boilerplate an agent pays for. Add landmark roles (main/nav/header/footer) so agents can skip it.

Content
32.9% · 766
Chrome (nav / header / footer)
52.1% · 1,213
Boilerplate (cookie / ad)
4.8% · 112
Other
10.2% · 238

Final screenshot

Final screenshot of https://www.quizlet.com

Diagnostics

high CRR Content is hidden behind JavaScript

pre-JS raw HTML

Evidence94% of content requires JS · 6% of rendered content recovered (rest is placeholder/wrong)
ImpactA non-rendering agent never sees the JS-injected content.
Effort1–4 h

Fix: Server-render or statically generate the main content so a non-JS agent still receives it; make client rendering a progressive enhancement, not the source of truth.

high TC 67.1% of tokens are non-content (boilerplate/chrome)

agent representation — token decomposition

EvidenceToken decomposition: content 32.9%, chrome 52.1%, boilerplate 4.8%, other 10.2%. Only 32.900000000000006% of the agent's tokens are real content.
ImpactAn agent pays for boilerplate on every request and has less context left for the real content.
Effort30–90 min

Fix: Strip repeated nav/header/footer/cookie chrome from the agent-visible output; wrap content in <main>/<article> so the extractor keeps signal and drops boilerplate.

medium SSD Low signal-to-noise for agents

content vs chrome/boilerplate

Evidencesignal 0.33 · website JSON-LD 1/2 · missing: name
ImpactAgent spends tokens parsing nav/boilerplate instead of content.
Effort30–90 min

Fix: Wrap the real content in <main>/<article>, cut repeated nav/boilerplate, and keep the primary content dense and early in the DOM.

Rendered profile: headless

Agent Discoverability 52/100 · Needs Work

Access & discovery checks — separate from the gated CAV metrics above. Click an issue for business impact, what we measured, and how to fix. · Take the Agent Readiness course →

Agent files & endpoints

✗ llms.txt Absent at /llms.txt and /.well-known/llms.txt Learn →
✓ robots.txt (AI bots) No robots.txt → nothing blocked Learn →
✗ sitemap.xml No /sitemap.xml Learn →
✗ JSON-LD structured data No JSON-LD found Learn →
~ agents.json Absent (emerging standard) Learn →
~ WebMCP endpoint Absent (emerging standard) Learn →
~ OpenAPI / API docs No OpenAPI/Swagger found Learn →

Issues (7)

✗ llms.txt present high impact Absent at /llms.txt and /.well-known/llms.txt

Business impact llms.txt is the robots.txt for AI: it tells agents what your site is, what matters, and where to find it. Without it AI guesses — and guessing means inaccurate recommendations and lost visibility.

What we measured We fetch /llms.txt and /.well-known/llms.txt and validate the spec (H1 title + a one-line blockquote summary). We also note /llms-full.txt (your full content as Markdown).

How to fix Create /llms.txt with a short summary + key pages; optionally /llms-full.txt with full content in Markdown.

Learn how to implement →

# Your Site
> One-line description for AI agents.

## Key pages
- /products — catalog
- /pricing — plans
- /docs — documentation

Spec: https://llmstxt.org

✗ No login wall on public content high impact HTTP 403

Business impact Public content behind authentication is unreachable to agents (they have no account). Gate only genuinely private material.

What we measured We follow redirects and detect 401/403 and login-form signals on content pages.

How to fix Separate public marketing/docs from authenticated areas; keep public pages reachable without login.

Spec: https://llmstxt.org

✗ Structured data (JSON-LD) medium impact No JSON-LD found

Business impact Schema.org JSON-LD tells agents what a page IS (product, article, business) with typed fields (price, rating, hours). Without it agents extract less reliably.

What we measured We parse <script type=application/ld+json>, validate it, and check for populated @type fields.

How to fix Add JSON-LD: Organization/LocalBusiness on the homepage, Product on product pages, Article on posts.

Learn how to implement →

<script type="application/ld+json">{"@context":"https://schema.org","@type":"Organization","name":"Your Co","url":"https://example.com"}</script>

Spec: https://schema.org/

✗ XML sitemap present medium impact No /sitemap.xml

Business impact A sitemap is your table of contents for AI crawlers. Without it agents follow homepage links and miss deep pages (products, docs, pricing) — shrinking what they can recommend.

What we measured We fetch /sitemap.xml (and /sitemap_index.xml), confirm valid XML with <loc> entries, and check <lastmod> freshness.

How to fix Generate an XML sitemap of all public pages with current lastmod dates and reference it in robots.txt.

Learn how to implement →

# robots.txt
Sitemap: https://example.com/sitemap.xml

Spec: https://www.sitemaps.org/

~ agents.json discovery low impact Absent (emerging standard)

Business impact agents.json describes what your site can DO for agents (services, endpoints, capabilities) — an emerging discovery standard. Early adopters get native agent integration.

What we measured We check /agents.json and /.well-known/agents.json for a valid configuration.

How to fix Publish /agents.json describing your site's capabilities and actions.

Learn how to implement →

Spec: https://github.com/wild-card-ai/agents-json

~ WebMCP endpoint low impact Absent (emerging standard)

Business impact WebMCP lets agents call actions on your site directly (book, buy, query) instead of scraping the DOM. Early adopters get native AI-agent interoperability.

What we measured We check /.well-known/webmcp and /webmcp.json for a valid actions array.

How to fix Add a WebMCP endpoint exposing your key actions to agents.

Learn how to implement →

Spec: https://webmcp.org

~ API documentation low impact No OpenAPI/Swagger found

Business impact Programmatic agents prefer a typed API. An OpenAPI/Swagger spec lets them integrate without scraping.

What we measured We probe /openapi.json, /swagger.json, /api-docs and /.well-known/openapi.json.

How to fix Publish an OpenAPI spec at a well-known path.

Learn how to implement →

Spec: https://www.openapis.org/

Passed audits (4)

✓ robots.txt allows AI bots✓ No CAPTCHA wall✓ No content-blocking cookie wall✓ Server response (TTFB)

Transport & Trust (SEC 1.0.0)

HTTPS, HSTS, CSP, sniffing, referrer and CORS posture. Diagnostic only — this does not affect the CAV score. A security header does not make a page more legible to an agent, so scoring it would reward a CDN toggle that changes nothing an agent can recover. We measure it and say so.

56Transport posture (0–100, unscored)
3pass
0warn
2fail
Per-header findings (6)
HeaderEvidence
✅ HTTPSserved over HTTPS
❌ HSTSno strict-transport-security header
❌ Content-Security-Policyno content-security-policy header
✅ X-Content-Type-Optionsnosniff
✅ Referrer-Policysame-origin
➖ CORS exposureno CORS headers on the document (normal for an HTML page)
Full profile — how to improve · unused JS · network · timing

How to improve

highProfile reflects a block/challenge page — not your contenthighest leverage

whole profile

EvidenceMeasured against a block/challenge page (a bot-wall/CAPTCHA was served (cdnjs.cloudflare.com)); every number here describes the wall, not your site.
ImpactAn AI agent hits the same wall and recovers none of your content — fix the block before optimizing anything else.
FixAllowlist legitimate agent user-agents / IP ranges in your WAF or bot-management and serve real content (not a challenge), then re-run.

Third-party impact

96 third-party requests · 3337 KiB (75% of transfer) · 187 ms main-thread — code an agent must also fetch/run before your content settles. Fewer, lazier third-parties = faster, cheaper agent reads.

Third-party domainReqsTransferMain-thread
prismic.io101290 KiB—
googletagmanager.com5851 KiB123 ms
ketchjs.com1325 KiB64 ms
facebook.net2220 KiB—
tiktok.com6161 KiB—
ketchcdn.com9123 KiB—
px-cloud.net5104 KiB—
google.com1098 KiB—
sc-static.net125 KiB—
cloudflare.com121 KiB—
google-analytics.com221 KiB—
redditstatic.com120 KiB—

Wasted JavaScript (by bundle)

Transfer-accurate — each bundle's transfer size × its unused %, ranked by wasted bytes (the biggest code-splitting wins). Unused JS also inflates Token Cost (TC).

BundleTransferUnusedWasted
https://assets.quizlet.com/_next/static/chunks/pages/_app-4a007b0981c86a8e.js606 KiB48.9%297 KiB
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js 3P325 KiB43.3%141 KiB
https://www.googletagmanager.com/gtag/js?id=G-BGGDEZ0S21&cx=c&gtm=4e6852 3P184 KiB49.5%91 KiB
https://www.googletagmanager.com/gtag/js?id=G-VG8TWT63ZN&cx=c&gtm=4e6852 3P183 KiB48.7%89 KiB
https://accounts.google.com/gsi/client 3P97 KiB80.2%78 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230862&cx=c&gtm=4e6852 3P155 KiB49.9%77 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-5GTSWTM 3P186 KiB41%76 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230863&cx=c&gtm=4e6852 3P144 KiB52.7%76 KiB
https://assets.quizlet.com/_next/static/chunks/framework-8a24182eaa4970de.js93 KiB80.8%75 KiB
https://analytics.tiktok.com/i18n/pixel/static/main.MWQwZTMxZTQ3MQ.js 3P115 KiB58.9%68 KiB
https://client.px-cloud.net/PXVlUfj7uV/main.min.js 3P99 KiB47.9%48 KiB
https://connect.facebook.net/en_US/fbevents.js 3P105 KiB42.8%45 KiB
https://connect.facebook.net/signals/config/1745833195445450?v=2.9.373&r=stable&domain=quizlet.com&hme=6d1ed5deee7eafc01c53d9e9fc3c4e10db50c3d28237bc4932686777e5c3969a&ex_m=111%2C215%2C163%2C23%2C76%2C77%2C154%2C72%2C71%2C11%2C172%2C96%2C17%2C146%2C134%2C41%2C79%2C84%2C142%2C168%2C174%2C27%2C15%2C28%2C29%2C30%2C32%2C50%2C155%2C81%2C119%2C19%2C21%2C46%2C42%2C44%2C43%2C89%2C98%2C102%2C117%2C153%2C156%2C48%2C118%2C25%2C22%2C126%2C73%2C38%2C158%2C157%2C159%2C150%2C148%2C26%2C37%2C61%2C116%2C170%2C74%2C18%2C161%2C121%2C87%2C70%2C20%2C91%2C92%2C123%2C90%2C144%2C143%2C147%2C103%2C169%2C36%2C51%2C120%2C49%2C8%2C4%2C5%2C7%2C6%2C3%2C97%2C108%2C175%2C182%2C229%2C78%2C242%2C241%2C240%2C24%2C35%2C57%2C110%2C63%2C10%2C67%2C104%2C105%2C106%2C112%2C137%2C33%2C31%2C139%2C140%2C141%2C136%2C135%2C164%2C80%2C167%2C165%2C166%2C52%2C62%2C130%2C16%2C171%2C47%2C286%2C287%2C285%2C300%2C318%2C222%2C211%2C64%2C212%2C210%2C321%2C312%2C54%2C223%2C114%2C138%2C86%2C128%2C56%2C127%2C133%2C132%2C60%2C68%2C66%2C160%2C82%2C83%2C122%2C39%2C34%2C55%2C58%2C107%2C173%2C1%2C131%2C14%2C129%2C12%2C2%2C59%2C99%2C69%2C65%2C125%2C95%2C94%2C176%2C177%2C100%2C101%2C9%2C109%2C53%2C151%2C93%2C85%2C75%2C124%2C113%2C45%2C152%2C0%2C88%2C145%2C149%2C162%2C40%2C115%2C13%2C178 3P115 KiB31.8%37 KiB
https://assets.quizlet.com/_next/static/chunks/main-c13aecbfa8b4b2f8.js43 KiB61%26 KiB
https://assets.quizlet.com/static/qw5r9bny.4.6.5.min.js25 KiB61.4%16 KiB

Network

144Requests
4449 KiBTransferred
46Scripts
75%3rd-party
5Long tasks
Script (46)
2775 KiB
Image (20)
1289 KiB
Fetch (26)
121 KiB
Font (6)
108 KiB
Document (6)
94 KiB
Stylesheet (7)
48 KiB
XHR (10)
8 KiB
Ping (9)
5 KiB
Manifest (1)
1 KiB
Other (13)
0 KiB
Heaviest requests (30)
URLTypeStatusTransfer
https://images.prismic.io/quizlet-web/jg49ofYHZKdPLZhK_Slice2.gif?auto=format,compressImage200887 KiB
https://assets.quizlet.com/_next/static/chunks/pages/_app-4a007b0981c86a8e.jsScript200606 KiB
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.jsScript200325 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-5GTSWTMScript200186 KiB
https://www.googletagmanager.com/gtag/js?id=G-BGGDEZ0S21&cx=c&gtm=4e6852Script200184 KiB
https://www.googletagmanager.com/gtag/js?id=G-VG8TWT63ZN&cx=c&gtm=4e6852Script200183 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230862&cx=c&gtm=4e6852Script200155 KiB
https://images.prismic.io/quizlet-web/ZpFqjB5LeNNTxHvk_teacher-image-LOH.png?auto=format,compressImage200150 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230863&cx=c&gtm=4e6852Script200144 KiB
https://connect.facebook.net/signals/config/1745833195445450?v=2.9.373&r=stable&domain=quizlet.com&hme=6d1ed5deee7eafc01c53d9e9fc3c4e10db50c3d28237bc4932686777e5c3969a&ex_m=111%2C215%2C163%2C23%2C76%2C77%2C154%2C72%2C71%2C11%2C172%2C96%2C17%2C146%2C134%2C41%2C79%2C84%2C142%2C168%2C174%2C27%2C15%2C28%2C29%2C30%2C32%2C50%2C155%2C81%2C119%2C19%2C21%2C46%2C42%2C44%2C43%2C89%2C98%2C102%2C117%2C153%2C156%2C48%2C118%2C25%2C22%2C126%2C73%2C38%2C158%2C157%2C159%2C150%2C148%2C26%2C37%2C61%2C116%2C170%2C74%2C18%2C161%2C121%2C87%2C70%2C20%2C91%2C92%2C123%2C90%2C144%2C143%2C147%2C103%2C169%2C36%2C51%2C120%2C49%2C8%2C4%2C5%2C7%2C6%2C3%2C97%2C108%2C175%2C182%2C229%2C78%2C242%2C241%2C240%2C24%2C35%2C57%2C110%2C63%2C10%2C67%2C104%2C105%2C106%2C112%2C137%2C33%2C31%2C139%2C140%2C141%2C136%2C135%2C164%2C80%2C167%2C165%2C166%2C52%2C62%2C130%2C16%2C171%2C47%2C286%2C287%2C285%2C300%2C318%2C222%2C211%2C64%2C212%2C210%2C321%2C312%2C54%2C223%2C114%2C138%2C86%2C128%2C56%2C127%2C133%2C132%2C60%2C68%2C66%2C160%2C82%2C83%2C122%2C39%2C34%2C55%2C58%2C107%2C173%2C1%2C131%2C14%2C129%2C12%2C2%2C59%2C99%2C69%2C65%2C125%2C95%2C94%2C176%2C177%2C100%2C101%2C9%2C109%2C53%2C151%2C93%2C85%2C75%2C124%2C113%2C45%2C152%2C0%2C88%2C145%2C149%2C162%2C40%2C115%2C13%2C178Script200115 KiB
https://analytics.tiktok.com/i18n/pixel/static/main.MWQwZTMxZTQ3MQ.jsScript200115 KiB
https://connect.facebook.net/en_US/fbevents.jsScript200105 KiB
https://client.px-cloud.net/PXVlUfj7uV/main.min.jsScript20099 KiB
https://accounts.google.com/gsi/clientScript20097 KiB
https://quizlet.com/Document20094 KiB
https://assets.quizlet.com/_next/static/chunks/framework-8a24182eaa4970de.jsScript20093 KiB
https://global.ketchcdn.com/gvl/eu/vendor-list.jsonFetch20092 KiB
https://images.prismic.io/quizlet-web/holUlUQfwYsqOq44_02ImageforTextCallout.png?auto=format,compressImage20066 KiB
https://images.prismic.io/quizlet-web/2lU_OixXN6udYJ4H_03ImageforTextCallout.png?auto=format,compressImage20047 KiB
https://assets.quizlet.com/_next/static/css/5b6415d9947d80c6.cssStylesheet20044 KiB
https://assets.quizlet.com/_next/static/chunks/main-c13aecbfa8b4b2f8.jsScript20043 KiB
https://images.prismic.io/quizlet-web/-gIyHFO_YktNuHtW_03Flashcards%402x.png?auto=format,compressImage20040 KiB
https://analytics.tiktok.com/i18n/pixel/static/identify_ea043f1c.jsScript20040 KiB
https://images.prismic.io/quizlet-web/B38ivIc3VV_b6T_F_01RecordNotes%402x.png?auto=format,compressImage20037 KiB
https://images.prismic.io/quizlet-web/hAEsq4zzZA69ezrZ_02StudyGuides%402x.png?auto=format,compressImage20029 KiB
https://assets.quizlet.com/static/qw5r9bny.4.6.5.min.jsScript20025 KiB
https://sc-static.net/scevent.min.jsScript20025 KiB
https://images.prismic.io/quizlet-web/_V4XnMddP-dw6fk2_04Games%402x.png?auto=format,compressImage20025 KiB
https://global.ketchcdn.com/web/v3/config/quizlet/website_smart_tag/production/pipeda/en-US/config.json?hash=17894307758236416083Fetch20022 KiB
https://cdnjs.cloudflare.com/ajax/libs/rollbar.js/2.26.1/rollbar.min.jsScript20021 KiB

Long tasks (>50 ms)

StartDuration
515 ms110 ms
644 ms104 ms
995 ms66 ms
915 ms63 ms
843 ms56 ms
Analyzing…
running mobile + desktop · ~30s