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www.epfl.ch

Report from 7/24/2026, 12:29:53 PM https://www.epfl.ch
Latest run · lab, cold cache
41
7/24/2026
28-day score · p75 · the standard
41
9 runs
CRR42%latest
SSD44%latest
TC1014 toklatest
TTFUT272 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/epfl.ch.svg)](https://agentvitals.dev/results?url=https%3A%2F%2Fwww.epfl.ch)
<a href="https://agentvitals.dev/results?url=https%3A%2F%2Fwww.epfl.ch"><img src="https://agentvitals.dev/badge/epfl.ch.svg" alt="Core Agent Vitals" height="20"></a>
What AI tells your customers about youAgent confidence: LOW
🟡Business nameEPFL · 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
🟡DescriptionBasée à Lausanne, L’EPFL est une université dont les trois missions sont l’éducation, la recherche et l’innovation. · guessed from page text (no structured data)

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
41
Overall score
weighted CAV (0–100)
FAIL
0–4950–8990–100

Metrics

42%
CRR Content Recovery Poor
0.44
SSD Semantic Signal Density Needs work
1,014 tok
TC Token Cost Good
233 ms
TTFUT Time to First Useful Token N/A

Token Cost breakdown

Where the page's tokens go (≈4,271 across regions). 44% is non-content — chrome and boilerplate an agent pays for. Add landmark roles (main/nav/header/footer) so agents can skip it.

Content
55.8% · 2,382
Chrome (nav / header / footer)
42.8% · 1,829
Boilerplate (cookie / ad)
1.1% · 47
Other
0.3% · 13

Final screenshot

Final screenshot of https://www.epfl.ch

Diagnostics

high CRR Content is hidden behind JavaScript

pre-JS raw HTML

Evidence58% of content requires JS · 42% 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.

medium SSD Low signal-to-noise for agents

content vs chrome/boilerplate

Evidencesignal 0.74 · JSON-LD 0/1 · missing: structured-data
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.

medium TC 44.2% of tokens are non-content (boilerplate/chrome)

agent representation — token decomposition

EvidenceToken decomposition: content 55.8%, chrome 42.8%, boilerplate 1.1%, other 0.3%. Only 55.8% 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.

Rendered profile: headless

Agent Discoverability 62/100 · 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) Blocks: * (all) Learn →
✓ sitemap.xml Found at /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 (6)

✗ robots.txt allows AI bots high impact Blocks: * (all)

Business impact If robots.txt blocks AI crawlers you are invisible to ChatGPT, Claude and Perplexity — they skip you and recommend a competitor instead.

What we measured We read /robots.txt and test it against 16 AI user-agents (GPTBot, ClaudeBot, PerplexityBot, …) for a Disallow that blocks them.

How to fix Allow major AI bots to public content; restrict only private paths (/admin, /api).

Learn how to implement →

User-agent: GPTBot
Allow: /
Disallow: /admin/

Spec: https://platform.openai.com/docs/gptbot

✗ 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

✗ 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/

~ 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 (5)

✓ No CAPTCHA wall✓ No content-blocking cookie wall✓ No login wall on public content✓ XML sitemap present + fresh✓ 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.

59Transport posture (0–100, unscored)
2pass
1warn
2fail
Per-header findings (6)
HeaderEvidence
✅ HTTPSserved over HTTPS
✅ HSTSmax-age=31536000
❌ Content-Security-Policyno content-security-policy header
❌ X-Content-Type-Optionsmissing nosniff
⚠️ Referrer-Policyno referrer-policy header (browser default applies)
➖ 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

6 third-party requests · 320 KiB (14% of transfer) · 61 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
googletagmanager.com2290 KiB55 ms
cloudflare.com127 KiB6 ms
w.org22 KiB—
google-analytics.com10 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://www.googletagmanager.com/gtag/js?id=G-N6BF9H5G73&cx=c&gtm=4e67f0 3P154 KiB53.6%83 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-PJGBG5R 3P136 KiB54%73 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/js/vendors.min.js?ver=178393619780 KiB84%68 KiB
https://www.epfl.ch/wp-includes/js/jquery/jquery.js?ver=3.7.185 KiB72%61 KiB
https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js?ver=1783936197 3P27 KiB67.2%18 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/js/elements.min.js?ver=178393619721 KiB75.9%16 KiB
https://www.epfl.ch/wp-content/plugins/wp-gutenberg-epfl/frontend/lib/list.min.js?ver=1.57 KiB93.9%7 KiB
https://www.epfl.ch/wp-includes/js/jquery/jquery-migrate.js?ver=3.4.111 KiB52.1%6 KiB
https://www.epfl.ch/wp-content/plugins/flowpaper-lite-pdf-flipbook/assets/lity/lity.min.js4 KiB73.2%3 KiB
https://www.epfl.ch/wp-includes/js/wp-emoji.js?ver=6.9.44 KiB22%1 KiB
https://umami.fsd.epfl.ch/script.js2 KiB35.3%1 KiB
https://www.epfl.ch/wp-includes/js/twemoji.js?ver=6.9.410 KiB6.8%1 KiB

Network

49Requests
2289 KiBTransferred
13Scripts
14%3rd-party
3Long tasks
Image (20)
1538 KiB
Script (13)
542 KiB
Stylesheet (6)
76 KiB
XHR (2)
74 KiB
Font (2)
36 KiB
Document (1)
19 KiB
Other (2)
2 KiB
Manifest (1)
1 KiB
Fetch (2)
1 KiB
Heaviest requests (30)
URLTypeStatusTransfer
https://actu.epfl.ch/image/165533/1440x810.jpgImage200429 KiB
https://www.epfl.ch/wp-content/uploads/2022/12/EPFL-vue-aerienne-Jamani-Caillet-1920x1080.jpgImage200348 KiB
https://www.epfl.ch/wp-content/uploads/2026/06/dimensions-num21-flipbook-1920x1080.jpgImage200309 KiB
https://www.googletagmanager.com/gtag/js?id=G-N6BF9H5G73&cx=c&gtm=4e67f0Script200154 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-PJGBG5RScript200136 KiB
https://actu.epfl.ch/image/165401/768x432.jpgImage200104 KiB
https://www.epfl.ch/wp-includes/js/jquery/jquery.js?ver=3.7.1Script20085 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/js/vendors.min.js?ver=1783936197Script20080 KiB
https://actu.epfl.ch/image/165345/768x432.jpgImage20079 KiB
https://actu.epfl.ch/image/165052/768x432.jpgImage20064 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/icons/icons.svgXHR20062 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/css/elements.min.css?ver=1783936197Stylesheet20052 KiB
https://memento.epfl.ch/image/33496/509x286.jpgImage20046 KiB
https://memento.epfl.ch/image/33270/509x286.jpgImage20043 KiB
https://memento.epfl.ch/image/33271/509x286.jpgImage20038 KiB
https://memento.epfl.ch/image/31035/509x286.jpgImage20032 KiB
https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js?ver=1783936197Script20027 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/js/elements.min.js?ver=1783936197Script20021 KiB
https://www.epfl.ch/en/Document20019 KiB
https://www.epfl.ch/fonts/SuisseIntl-SemiBold-WebS.woff2Font20018 KiB
https://www.epfl.ch/fonts/SuisseIntl-Regular-WebS.woff2Font20018 KiB
https://memento.epfl.ch/image/33424/509x286.jpgImage20018 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/icons/feather-sprite.svgXHR20012 KiB
https://www.epfl.ch/wp-includes/js/jquery/jquery-migrate.js?ver=3.4.1Script20011 KiB
https://www.epfl.ch/wp-content/plugins/enlighter/cache/enlighterjs.min.css?ver=nOru9GX9Bgee7XgStylesheet20010 KiB
https://www.epfl.ch/wp-includes/js/twemoji.js?ver=6.9.4Script20010 KiB
https://www.epfl.ch/wp-content/themes/wp-theme-2018/assets/css/vendors.min.css?ver=1783936197Stylesheet2008 KiB
https://www.epfl.ch/wp-content/plugins/wp-gutenberg-epfl/frontend/lib/list.min.js?ver=1.5Script2007 KiB
https://www.epfl.ch/wp-content/uploads/2021/09/Recherche.pngImage2006 KiB
https://www.epfl.ch/wp-content/uploads/2021/09/Facultes.pngImage2005 KiB

Long tasks (>50 ms)

StartDuration
525 ms214 ms
447 ms71 ms
935 ms55 ms
Analyzing…
running mobile + desktop · ~30s