← Analyze a URL · Tested sites

www.quizlet.com

Report from 9/19/2026, 11:04:30 AM https://www.quizlet.com
Latest run · lab, cold cache
27
9/19/2026
28-day score · p75 · the standard
—
4/7 runs — building history (nightly)

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
202 tok
TC Token Cost Good
14 ms
TTFUT Time to First Useful Token N/A

Token Cost breakdown

Where the page's tokens go (≈2,621 across regions). 65% is non-content — chrome and boilerplate an agent pays for. Add landmark roles (main/nav/header/footer) so agents can skip it.

Content
35.1% · 919
Chrome (nav / header / footer)
46.9% · 1,229
Boilerplate (cookie / ad)
4.3% · 112
Other
13.8% · 361

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 64.9% of tokens are non-content (boilerplate/chrome)

agent representation — token decomposition

EvidenceToken decomposition: content 35.1%, chrome 46.9%, boilerplate 4.3%, other 13.8%. Only 35.099999999999994% 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 0.32 · 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

105 third-party requests · 3324 KiB (72.1% of transfer) · 407 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.io101161 KiB—
googletagmanager.com5875 KiB209 ms
ketchjs.com1328 KiB117 ms
px-cloud.net8251 KiB—
facebook.net2245 KiB81 ms
tiktok.com6161 KiB—
google.com12100 KiB—
ketchcdn.com835 KiB—
sc-static.net125 KiB—
cloudflare.com121 KiB—
google-analytics.com221 KiB—
redditstatic.com121 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-72c45f1ef9057c1a.js672 KiB50.8%341 KiB
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js 3P328 KiB43.5%143 KiB
https://www.googletagmanager.com/gtag/js?id=G-BGGDEZ0S21&cx=c&gtm=4e69g1 3P188 KiB50.2%95 KiB
https://www.googletagmanager.com/gtag/js?id=G-VG8TWT63ZN&cx=c&gtm=4e69g1 3P187 KiB49%92 KiB
https://accounts.google.com/gsi/client 3P99 KiB80.4%80 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230862&cx=c&gtm=4e69g1 3P161 KiB48.1%78 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-5GTSWTM 3P192 KiB40.3%78 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230863&cx=c&gtm=4e69g1 3P146 KiB53%77 KiB
https://assets.quizlet.com/_next/static/chunks/framework-9f721bd49461e8d1.js94 KiB81.2%76 KiB
https://analytics.tiktok.com/i18n/pixel/static/main.MWU2MzIzODM0MQ.js 3P115 KiB58.4%67 KiB
https://connect.facebook.net/signals/config/1745833195445450?v=2.9.403&r=stable&domain=quizlet.com&hme=ecef7557496abce7ebfd30d9fec7f02b78383ffbf3f454783aea671f0dea1dfc&ex_m=117%2C234%2C168%2C27%2C81%2C82%2C160%2C77%2C76%2C11%2C178%2C101%2C20%2C152%2C140%2C46%2C84%2C89%2C148%2C173%2C180%2C8%2C4%2C5%2C7%2C6%2C3%2C102%2C114%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C161%2C86%2C125%2C22%2C24%2C51%2C47%2C49%2C48%2C94%2C103%2C107%2C123%2C159%2C162%2C53%2C124%2C29%2C26%2C132%2C78%2C43%2C164%2C163%2C165%2C156%2C154%2C30%2C42%2C66%2C122%2C175%2C79%2C21%2C127%2C92%2C75%2C23%2C96%2C97%2C129%2C95%2C150%2C149%2C153%2C108%2C174%2C177%2C41%2C56%2C126%2C54%2C182%2C109%2C181%2C201%2C248%2C83%2C262%2C261%2C260%2C14%2C25%2C28%2C40%2C62%2C116%2C68%2C10%2C72%2C110%2C111%2C112%2C118%2C143%2C38%2C36%2C145%2C146%2C147%2C142%2C141%2C169%2C85%2C172%2C170%2C171%2C57%2C67%2C136%2C19%2C176%2C52%2C311%2C312%2C313%2C310%2C326%2C351%2C241%2C230%2C69%2C231%2C229%2C354%2C345%2C59%2C242%2C120%2C144%2C91%2C134%2C61%2C133%2C139%2C138%2C65%2C73%2C71%2C166%2C87%2C88%2C128%2C44%2C39%2C60%2C63%2C113%2C179%2C1%2C137%2C16%2C135%2C12%2C2%2C64%2C104%2C15%2C74%2C70%2C131%2C100%2C99%2C184%2C185%2C105%2C106%2C9%2C115%2C183%2C58%2C157%2C98%2C90%2C80%2C130%2C119%2C50%2C158%2C0%2C93%2C151%2C155%2C167%2C45%2C121%2C13%2C186 3P137 KiB34.1%47 KiB
https://connect.facebook.net/en_US/fbevents.js 3P108 KiB42.4%46 KiB
https://assets.quizlet.com/_next/static/chunks/main-0712e7cc4d79c47f.js43 KiB61.1%26 KiB
https://ri.px-cloud.net/index.js?v=10cd8fbe-b41a-11f1-979f-200b8586c60b&a=PXVlUfj7uV 3P144 KiB11.1%16 KiB
https://assets.quizlet.com/static/qw5r9bny.4.6.5.min.js25 KiB61.4%16 KiB

Network

156Requests
4610 KiBTransferred
47Scripts
72.1%3rd-party
8Long tasks
Script (47)
3049 KiB
Image (21)
1156 KiB
Other (15)
114 KiB
Font (6)
108 KiB
Document (6)
88 KiB
Stylesheet (7)
48 KiB
Fetch (32)
33 KiB
XHR (12)
9 KiB
Ping (9)
5 KiB
Manifest (1)
1 KiB
Heaviest requests (30)
URLTypeStatusTransfer
https://images.prismic.io/quizlet-web/jg49ofYHZKdPLZhK_Slice2.gif?auto=format,compressImage200928 KiB
https://assets.quizlet.com/_next/static/chunks/pages/_app-72c45f1ef9057c1a.jsScript200672 KiB
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.jsScript200328 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-5GTSWTMScript200192 KiB
https://www.googletagmanager.com/gtag/js?id=G-BGGDEZ0S21&cx=c&gtm=4e69g1Script200188 KiB
https://www.googletagmanager.com/gtag/js?id=G-VG8TWT63ZN&cx=c&gtm=4e69g1Script200187 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230862&cx=c&gtm=4e69g1Script200161 KiB
https://www.googletagmanager.com/gtag/js?id=AW-943230863&cx=c&gtm=4e69g1Script200146 KiB
https://ri.px-cloud.net/index.js?v=10cd8fbe-b41a-11f1-979f-200b8586c60b&a=PXVlUfj7uVScript200144 KiB
https://connect.facebook.net/signals/config/1745833195445450?v=2.9.403&r=stable&domain=quizlet.com&hme=ecef7557496abce7ebfd30d9fec7f02b78383ffbf3f454783aea671f0dea1dfc&ex_m=117%2C234%2C168%2C27%2C81%2C82%2C160%2C77%2C76%2C11%2C178%2C101%2C20%2C152%2C140%2C46%2C84%2C89%2C148%2C173%2C180%2C8%2C4%2C5%2C7%2C6%2C3%2C102%2C114%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C161%2C86%2C125%2C22%2C24%2C51%2C47%2C49%2C48%2C94%2C103%2C107%2C123%2C159%2C162%2C53%2C124%2C29%2C26%2C132%2C78%2C43%2C164%2C163%2C165%2C156%2C154%2C30%2C42%2C66%2C122%2C175%2C79%2C21%2C127%2C92%2C75%2C23%2C96%2C97%2C129%2C95%2C150%2C149%2C153%2C108%2C174%2C177%2C41%2C56%2C126%2C54%2C182%2C109%2C181%2C201%2C248%2C83%2C262%2C261%2C260%2C14%2C25%2C28%2C40%2C62%2C116%2C68%2C10%2C72%2C110%2C111%2C112%2C118%2C143%2C38%2C36%2C145%2C146%2C147%2C142%2C141%2C169%2C85%2C172%2C170%2C171%2C57%2C67%2C136%2C19%2C176%2C52%2C311%2C312%2C313%2C310%2C326%2C351%2C241%2C230%2C69%2C231%2C229%2C354%2C345%2C59%2C242%2C120%2C144%2C91%2C134%2C61%2C133%2C139%2C138%2C65%2C73%2C71%2C166%2C87%2C88%2C128%2C44%2C39%2C60%2C63%2C113%2C179%2C1%2C137%2C16%2C135%2C12%2C2%2C64%2C104%2C15%2C74%2C70%2C131%2C100%2C99%2C184%2C185%2C105%2C106%2C9%2C115%2C183%2C58%2C157%2C98%2C90%2C80%2C130%2C119%2C50%2C158%2C0%2C93%2C151%2C155%2C167%2C45%2C121%2C13%2C186Script200137 KiB
https://analytics.tiktok.com/i18n/pixel/static/main.MWU2MzIzODM0MQ.jsScript200115 KiB
https://quizlet.com/_next/static/media/q-twilight.e27821d9.pngOther403114 KiB
https://connect.facebook.net/en_US/fbevents.jsScript200108 KiB
https://client.px-cloud.net/PXVlUfj7uV/main.min.jsScript200103 KiB
https://accounts.google.com/gsi/clientScript20099 KiB
https://assets.quizlet.com/_next/static/chunks/framework-9f721bd49461e8d1.jsScript20094 KiB
https://quizlet.com/Document20088 KiB
https://images.prismic.io/quizlet-web/Xc4T-CyTEamt60o3_ImageforTextCallout%402x.png?auto=format,compressImage20068 KiB
https://assets.quizlet.com/_next/static/css/e89598b56064b00c.cssStylesheet20044 KiB
https://assets.quizlet.com/_next/static/chunks/main-0712e7cc4d79c47f.jsScript20043 KiB
https://analytics.tiktok.com/i18n/pixel/static/identify_0504602d.jsScript20040 KiB
https://images.prismic.io/quizlet-web/2lU_OixXN6udYJ4H_03ImageforTextCallout.png?auto=format,compressImage20034 KiB
https://images.prismic.io/quizlet-web/ZpFqjB5LeNNTxHvk_teacher-image-LOH.png?auto=format,compressImage20031 KiB
https://images.prismic.io/quizlet-web/-gIyHFO_YktNuHtW_03Flashcards%402x.png?auto=format,compressImage20027 KiB
https://assets.quizlet.com/static/qw5r9bny.4.6.5.min.jsScript20025 KiB
https://global.ketchcdn.com/web/v3/config/quizlet/website_smart_tag/production/pipeda/en-US/config.json?hash=13326776905878348717Fetch20025 KiB
https://sc-static.net/scevent.min.jsScript20025 KiB
https://images.prismic.io/quizlet-web/hAEsq4zzZA69ezrZ_02StudyGuides%402x.png?auto=format,compressImage20023 KiB
https://cdnjs.cloudflare.com/ajax/libs/rollbar.js/2.26.1/rollbar.min.jsScript20021 KiB
https://www.redditstatic.com/ads/pixel.jsScript20021 KiB

Long tasks (>50 ms)

StartDuration
516 ms129 ms
672 ms111 ms
1528 ms94 ms
969 ms89 ms
1855 ms81 ms
800 ms69 ms
1386 ms53 ms
895 ms52 ms
Analyzing…
running mobile + desktop · ~30s