www.edx.org

Report from 8/24/2026, 1:36:17 PM https://www.edx.org/
Latest run · lab, cold cache
46
8/24/2026
28-day score · p75 · the standard
66
26 runs
▼ latest 20 below the 28-day score
CRR6%latest
SSD100%latest
TC7625 toklatest
TTFUT108 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/edx.org.svg)](https://agentvitals.dev/results?url=https%3A%2F%2Fwww.edx.org%2F)
<a href="https://agentvitals.dev/results?url=https%3A%2F%2Fwww.edx.org%2F"><img src="https://agentvitals.dev/badge/edx.org.svg" alt="Core Agent Vitals" height="20"></a>
What AI tells your customers about youAgent confidence: MEDIUM
Business nameedX
CategoryOrganization
Pricenot found
LocationUS
Hoursnot found
Productsnot found
DescriptionOnline learning Massive Open Online Course Platform offering courses from leading institutions worldwide

An agent gets the basics but will guess on the gaps. 4/7 applicable facts come from machine-readable structured data.

46
Overall score
weighted CAV (0–100)
FAIL
0–4950–8990–100

Metrics

6%
CRR Content Recovery Poor
1.00
SSD Semantic Signal Density Good
7,625 tok
TC Token Cost Needs work
140 ms
TTFUT Time to First Useful Token N/A

Token Cost breakdown

Where the page's tokens go (≈109,494 across regions). Most tokens are real content — the agent isn't paying much for chrome.

Content
97% · 106,233
Chrome (nav / header / footer)
2.9% · 3,170
Boilerplate (cookie / ad)
0.1% · 66
Other
0% · 25

Final screenshot

Final screenshot of https://www.edx.org/

Diagnostics

high CRR Content is hidden behind JavaScript

pre-JS raw HTML

Evidence94% of content requires JS
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 TC Token cost over budget — 3% non-content

agent representation (Chrome/markdown output)

EvidenceToken decomposition: content 97%, chrome 2.9%, boilerplate 0.1%, other 0%. 7625 tokens total.
ImpactAn agent pays for every token; 3% is chrome/boilerplate/other and crowds the context window.
Effort30–90 min

Fix: Trim boilerplate, collapse repeated structures, and drop decorative markup from agent-visible content so an agent spends fewer tokens to read the page.

Rendered profile: headless

Agent Discoverability 94/100 · Agent Ready

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 Found at /llms.txt Learn →
robots.txt (AI bots) Major AI bots allowed Learn →
sitemap.xml Found at /sitemap.xml Learn →
JSON-LD structured data Types: Organization Learn →
~ agents.json Absent (emerging standard) Learn →
~ WebMCP endpoint Absent (emerging standard) Learn →
~ OpenAPI / API docs No OpenAPI/Swagger found Learn →

Issues (4)

~ No content-blocking cookie wall medium impact Consent platform: onetrust (verify it doesn't block content)

Business impact A consent wall that hides content until a click is invisible to agents — they cannot click 'Accept'.

What we measured We fingerprint OneTrust, Cookiebot, Usercentrics and similar managers and flag content-blocking ones.

How to fix Use an overlay banner that leaves content in the DOM, not a blocking interstitial.

Spec: https://gdpr.eu/cookies/

~ 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 (8)

✓ robots.txt allows AI bots✓ No CAPTCHA wall✓ Machine-readable prices✓ llms.txt present + valid✓ No login wall on public content✓ Structured data (JSON-LD)✓ 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.

100Transport posture (0–100, unscored)
5pass
0warn
0fail
Per-header findings (6)
HeaderEvidence
✅ HTTPSserved over HTTPS
✅ HSTSmax-age=31536000
✅ Content-Security-Policypolicy present, script-src does not allow inline
✅ X-Content-Type-Optionsnosniff
✅ Referrer-Policystrict-origin-when-cross-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 (www.gstatic.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

18 third-party requests · 744 KiB (13.5% of transfer) · 295 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.com2365 KiB116 ms
gstatic.com1313 KiB135 ms
newrelic.com132 KiB12 ms
highereducation.com228 KiB
nr-data.net52 KiB
branch.io21 KiB
google.com21 KiB32 ms
app.link11 KiB
onetrust.com10 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.edx.org/_next/static/chunks/29771-4fa195896a48bbc4.js565 KiB80.5%455 KiB
https://www.gstatic.com/recaptcha/releases/xg_pWYS8-HRESiV6Rdg4aY_R/recaptcha__en.js 3P313 KiB70.2%220 KiB
https://www.edx.org/_next/static/chunks/82c1a80d-58272e4fb6f46804.js241 KiB85.2%205 KiB
https://www.edx.org/_next/static/chunks/4cde4f2d-f0cdd749c4c79f34.js144 KiB98.7%143 KiB
https://www.edx.org/_next/static/chunks/a4634e51-e0ea9966714daeda.js119 KiB95.4%113 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-543ZGMK2 3P174 KiB53.1%92 KiB
https://www.googletagmanager.com/gtag/js?id=G-D3KS4KMDT0&cx=c&gtm=4e68j0 3P192 KiB46.6%89 KiB
https://www.edx.org/_next/static/chunks/34713-cbaa199b58f25923.js94 KiB79.2%75 KiB
https://beam.edx.org/scripttemplates/202407.2.0/otBannerSdk.js111 KiB66.7%74 KiB
https://www.edx.org/_next/static/chunks/aaea2bcf-fcf14465037c204e.js100 KiB71.1%71 KiB
https://www.edx.org/_next/static/chunks/10c000c1-820b48e60ecf9a58.js57 KiB99.7%57 KiB
https://www.edx.org/_next/static/chunks/4a5bd2f9-617fa068d6f982b8.js63 KiB89.5%56 KiB
https://www.edx.org/_next/static/chunks/333-096874c8170a0a08.js78 KiB70.9%55 KiB
https://www.edx.org/_next/static/chunks/ae064d6e-6afe0db64dd9b6e6.js60 KiB92.4%55 KiB
https://www.edx.org/_next/static/chunks/7513-e0efc59ee3cace91.js71 KiB70.8%51 KiB

Network

186Requests
5525 KiBTransferred
61Scripts
13.5%3rd-party
10Long tasks
Script (61)
3280 KiB
Fetch (19)
673 KiB
Stylesheet (12)
570 KiB
Document (2)
512 KiB
Image (55)
398 KiB
Font (1)
48 KiB
XHR (35)
42 KiB
Other (1)
1 KiB
Heaviest requests (30)
URLTypeStatusTransfer
https://www.edx.org/api/trending-productsFetch200589 KiB
https://www.edx.org/_next/static/chunks/29771-4fa195896a48bbc4.jsScript200565 KiB
https://www.edx.org/Document200512 KiB
https://www.edx.org/_next/static/css/94969c5b216c0fd2.cssStylesheet200456 KiB
https://www.gstatic.com/recaptcha/releases/xg_pWYS8-HRESiV6Rdg4aY_R/recaptcha__en.jsScript200313 KiB
https://www.edx.org/_next/static/chunks/82c1a80d-58272e4fb6f46804.jsScript200241 KiB
https://www.googletagmanager.com/gtag/js?id=G-D3KS4KMDT0&cx=c&gtm=4e68j0Script200192 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-543ZGMK2Script200174 KiB
https://www.edx.org/_next/static/chunks/4cde4f2d-f0cdd749c4c79f34.jsScript200144 KiB
https://www.edx.org/_next/static/chunks/a4634e51-e0ea9966714daeda.jsScript200119 KiB
https://beam.edx.org/scripttemplates/202407.2.0/otBannerSdk.jsScript200111 KiB
https://www.edx.org/_next/static/chunks/aaea2bcf-fcf14465037c204e.jsScript200100 KiB
https://www.edx.org/_next/static/chunks/34713-cbaa199b58f25923.jsScript20094 KiB
https://www.edx.org/api/auto-block?id=fa169e97-be64-4cc1-bad3-9534590f9a30Script20093 KiB
https://www.edx.org/_next/static/chunks/333-096874c8170a0a08.jsScript20078 KiB
https://www.edx.org/_next/static/css/c795147a76b3479b.cssStylesheet20073 KiB
https://www.edx.org/_next/static/chunks/7513-e0efc59ee3cace91.jsScript20071 KiB
https://www.edx.org/_next/static/chunks/4a5bd2f9-617fa068d6f982b8.jsScript20063 KiB
https://www.edx.org/_next/static/chunks/ae064d6e-6afe0db64dd9b6e6.jsScript20060 KiB
https://www.edx.org/_next/static/chunks/10c000c1-820b48e60ecf9a58.jsScript20057 KiB
https://www.edx.org/_next/static/chunks/4bd1b696-8114277e1a0c5c1d.jsScript20054 KiB
https://www.edx.org/_next/static/chunks/b8ba6eb2-0cd72085a856696d.jsScript20052 KiB
https://www.edx.org/_next/static/media/e4af272ccee01ff0-s.p.woff2Font20048 KiB
https://www.edx.org/_next/static/chunks/6150e6b2-ce9d408431310ecd.jsScript20048 KiB
https://www.edx.org/_next/static/chunks/31684-c747813ca79ce5e5.jsScript20047 KiB
https://www.edx.org/_next/static/chunks/78777-d811fae85b159d80.jsScript20046 KiB
https://www.edx.org/beam.jsScript20035 KiB
https://js-agent.newrelic.com/nr-spa-1.320.1.min.jsScript20032 KiB
https://www.edx.org/_next/static/chunks/42784-02fbcbd154f07c0d.jsScript20031 KiB
https://www.edx.org/_next/static/chunks/8cc6faea-d4a5213af5d556c9.jsScript20027 KiB

Long tasks (>50 ms)

StartDuration
6396 ms4094 ms
11221 ms427 ms
5503 ms402 ms
2931 ms347 ms
5010 ms302 ms
10996 ms210 ms
2719 ms200 ms
3789 ms198 ms
10517 ms190 ms
504 ms188 ms
Analyzing…
running mobile + desktop · ~30s