www.facebook.com
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.
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.
Metrics
Token Cost breakdown
Where the page's tokens go (≈1,721 across regions). Most tokens are real content — the agent isn't paying much for chrome.
Final screenshot
Diagnostics
pre-JS raw HTML
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.
content vs chrome/boilerplate
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
Metrics
Token Cost breakdown
Where the page's tokens go (≈218 across regions). Most tokens are real content — the agent isn't paying much for chrome.
Final screenshot
Diagnostics
pre-JS raw HTML
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.
content vs chrome/boilerplate
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
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
Issues (5)
✗ 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).
User-agent: GPTBot
Allow: /
Disallow: /admin/
~ No content-blocking cookie wall medium impact Consent platform: cookieconsent (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/
~ llms.txt present + valid high impact Found at /llms.txt but missing H1/blockquote
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.
# Your Site
> One-line description for AI agents.
## Key pages
- /products — catalog
- /pricing — plans
- /docs — documentationSpec: 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.
<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 Sitemap found but no <url>/<loc> entries
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.
# robots.txt
Sitemap: https://example.com/sitemap.xml
Passed audits (7)
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.
Per-header findings (6)
| Header | Evidence |
|---|---|
| ✅ HTTPS | served over HTTPS |
| ✅ HSTS | max-age=15552000; preload |
| ✅ Content-Security-Policy | policy present, script-src does not allow inline |
| ✅ X-Content-Type-Options | nosniff |
| ⚠️ Referrer-Policy | no referrer-policy header (browser default applies) |
| ➖ CORS exposure | no CORS headers on the document (normal for an HTML page) |
How to improve
PFHmmZHOhZBVMhnv56PTYrAyfnKytW-pR.js — 276 KiB transferred, 79.3% unused (third-party)
fbcdn.net — 1895 KiB, 23 requests, 110 ms main-thread
Third-party impact
24 third-party requests · 1895 KiB (96% of transfer) · 110 ms main-thread — code an agent must also fetch/run before your content settles. Fewer, lazier third-parties = faster, cheaper agent reads.
| Third-party domain | Reqs | Transfer | Main-thread |
|---|---|---|---|
| fbcdn.net | 23 | 1895 KiB | 110 ms |
| instagram.com | 1 | 0 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).
| Bundle | Transfer | Unused | Wasted |
|---|---|---|---|
| https://static.xx.fbcdn.net/rsrc.php/v4ibeB4/yA/l/en_US-j/PFHmmZHOhZBVMhnv56PTYrAyfnKytW-pR.js 3P | 276 KiB | 79.3% | 219 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i_054/yC/l/en_US-j/4s6ZYIamF3J.js 3P | 208 KiB | 52.1% | 108 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4igzN4/yu/l/en_US-j/Es46Xth78JU.js 3P | 101 KiB | 95.9% | 97 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i6t64/yP/l/en_US-j/fjszEw50XS-C0GTHmLwbNbW3dd5xamf8882Yz_4vfOJLldlUDUZRIYNpoQdTyCOVEbf8o16qcduuM4SU6MZnBjqvVIPNHOqVL96-6WbiBCT8LXhlOg4ZYKX0hZjJt_i5-ILHXV_vKBEegn7.js 3P | 114 KiB | 74.5% | 85 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4ikjj4/yH/l/en_US-j/VCRTBEaTGnK.js 3P | 92 KiB | 91.8% | 84 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4isKk4/yI/l/en_US-j/TgtpUvLdurDDLMG7Z2bDpMv_kkAv_-wGQ09ifBOb5QwcLSF6kN-2GoifAozIMNFBkk1DfJX9-hacAWSb1niIuqZrfBy4VWr_ZMK0ypT2Y5tgJ4S9sQi2-5GQGRwpzJEGrnHdn4SEVucneljsVjQqltBeBhh2otzgdunJl3g9q4pR78qL69VqNNp4Gm153ZOJj2SL08BHl-lElGzTH4Lah-t55E7mKqLYr_uYLTaavkZc4HIHnCn_h8ECZYBY4JZCcc2ZP1Mq8wypiAW_bfkM7xahNNmo79-AMUuK2ufRhjSAS_50wrZWAdmh5DEndjkC1LYw5WWi7I.js 3P | 109 KiB | 55.1% | 60 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4ix3r4/yw/l/en_US-j/DVIpADUDDWs.js 3P | 60 KiB | 84.8% | 51 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4/yx/r/SsNaJcrmaRU.js 3P | 76 KiB | 61.8% | 47 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4ilI84/yu/l/en_US-j/WEsnp6SJyaJ.js 3P | 47 KiB | 75% | 36 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4iq8a4/yN/l/en_US-j/R1J_2bM5n27.js 3P | 29 KiB | 63.3% | 18 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i7M54/yr/l/en_US-j/bIcPFlEiOMb.js 3P | 13 KiB | 95.2% | 13 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4/yS/r/74CzMLPteo0.js 3P | 11 KiB | 93.6% | 10 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i2VD4/yS/l/en_US-j/Vn8kLh9ax5T.js 3P | 10 KiB | 89.9% | 9 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4iX2a4/yZ/l/en_US-j/L2OjEpNOBjY63T-omr2qwMciA8WtYtX2KRtKQGwG0ihEa-9ML_Y_MRXHBlvxuIMFsRSR_169Kn2AO-Qx8lcabVTDOwgx-s7CoHnWzwQJgYNypqfLHbNLMWmrsO2zT06LS1itWcDE791sWIWOQEKEXaGJ8DwBsqEPHSH1YTvtL32s_6TN5GUvR7zmf91oXroJ7K59X9C3AwQd1t3qNKef6G-hKocd89O_LiCUWDnXRwDHCkV8R1onn-JtdZ7PJrsOfCedTPWKCFM-z_0Q2ncNh9-DZBIN8jKeHWrECl3_n5Wu6jBGHRQaCndvTeBZ7UOSS1OrajkDar.js 3P | 10 KiB | 54% | 5 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4/yd/r/QpQ4ZveDLN4.js 3P | 15 KiB | 23.6% | 4 KiB |
Network
Heaviest requests (30)
| URL | Type | Status | Transfer |
|---|---|---|---|
| https://static.xx.fbcdn.net/rsrc.php/v5/ya/l/0,cross/yf_BIlU1wtEimFPorVHExrzjmfHkpePhe7TF2-QXH5TPKkepWw7OiWAT9DWDYPz6DhfgQe914iiBfONMKn3YhINqU49pVNahkCkvx2I9b7Pb8K.css | Stylesheet | 200 | 307 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4ibeB4/yA/l/en_US-j/PFHmmZHOhZBVMhnv56PTYrAyfnKytW-pR.js | Script | 200 | 276 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i_054/yC/l/en_US-j/4s6ZYIamF3J.js | Script | 200 | 208 KiB |
| https://static.xx.fbcdn.net/rsrc.php/yQ/r/-pkMfchyeAZ.woff2 | Font | 200 | 179 KiB |
| https://static.xx.fbcdn.net/rsrc.php/yB/r/83zWJdc6PJI.webp | Image | 200 | 174 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i6t64/yP/l/en_US-j/fjszEw50XS-C0GTHmLwbNbW3dd5xamf8882Yz_4vfOJLldlUDUZRIYNpoQdTyCOVEbf8o16qcduuM4SU6MZnBjqvVIPNHOqVL96-6WbiBCT8LXhlOg4ZYKX0hZjJt_i5-ILHXV_vKBEegn7.js | Script | 200 | 114 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4isKk4/yI/l/en_US-j/TgtpUvLdurDDLMG7Z2bDpMv_kkAv_-wGQ09ifBOb5QwcLSF6kN-2GoifAozIMNFBkk1DfJX9-hacAWSb1niIuqZrfBy4VWr_ZMK0ypT2Y5tgJ4S9sQi2-5GQGRwpzJEGrnHdn4SEVucneljsVjQqltBeBhh2otzgdunJl3g9q4pR78qL69VqNNp4Gm153ZOJj2SL08BHl-lElGzTH4Lah-t55E7mKqLYr_uYLTaavkZc4HIHnCn_h8ECZYBY4JZCcc2ZP1Mq8wypiAW_bfkM7xahNNmo79-AMUuK2ufRhjSAS_50wrZWAdmh5DEndjkC1LYw5WWi7I.js | Script | 200 | 109 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4igzN4/yu/l/en_US-j/Es46Xth78JU.js | Script | 200 | 101 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4ikjj4/yH/l/en_US-j/VCRTBEaTGnK.js | Script | 200 | 92 KiB |
| https://www.facebook.com/ | Document | 200 | 78 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4/yx/r/SsNaJcrmaRU.js | Script | 200 | 76 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4ix3r4/yw/l/en_US-j/DVIpADUDDWs.js | Script | 200 | 60 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4ilI84/yu/l/en_US-j/WEsnp6SJyaJ.js | Script | 200 | 47 KiB |
| https://static.xx.fbcdn.net/rsrc.php/yl/r/9AJbVCy4-G1.woff2 | Font | 200 | 29 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4iq8a4/yN/l/en_US-j/R1J_2bM5n27.js | Script | 200 | 29 KiB |
| https://static.xx.fbcdn.net/rsrc.php/y1/r/ay1hV6OlegS.ico | Other | 200 | 20 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4/yd/r/QpQ4ZveDLN4.js | Script | 200 | 15 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i7M54/yr/l/en_US-j/bIcPFlEiOMb.js | Script | 200 | 13 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4/yS/r/74CzMLPteo0.js | Script | 200 | 11 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4iZoy4/yC/l/en_US-j/nLtysZp4wRJrruBGGEYFdG-3cg2A1TYpF40307glsc25AdF4Q4yS3Q5yLIhLjdtTF59V3TtN2HhP5s1wM94cLJpa1QCeCZRMWgwxvyfVWAYRn5Q5XLynIoHzskHM2TrHr72z775NzKCi2Sch9boWyHYdnzATCB6ghfjDQ.js | Script | 200 | 10 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4i2VD4/yS/l/en_US-j/Vn8kLh9ax5T.js | Script | 200 | 10 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4iX2a4/yZ/l/en_US-j/L2OjEpNOBjY63T-omr2qwMciA8WtYtX2KRtKQGwG0ihEa-9ML_Y_MRXHBlvxuIMFsRSR_169Kn2AO-Qx8lcabVTDOwgx-s7CoHnWzwQJgYNypqfLHbNLMWmrsO2zT06LS1itWcDE791sWIWOQEKEXaGJ8DwBsqEPHSH1YTvtL32s_6TN5GUvR7zmf91oXroJ7K59X9C3AwQd1t3qNKef6G-hKocd89O_LiCUWDnXRwDHCkV8R1onn-JtdZ7PJrsOfCedTPWKCFM-z_0Q2ncNh9-DZBIN8jKeHWrECl3_n5Wu6jBGHRQaCndvTeBZ7UOSS1OrajkDar.js | Script | 200 | 10 KiB |
| https://static.xx.fbcdn.net/rsrc.php/yP/r/b_lEtPAUPMI.webp | Image | 200 | 3 KiB |
| https://static.xx.fbcdn.net/rsrc.php/v4/yD/r/-yEwuPKSfI5.js | Script | 200 | 0 KiB |
| https://www.facebook.com/ajax/qm/?__a=1&__user=0&__comet_req=15&jazoest=22207 | Ping | 200 | 0 KiB |
| https://www.facebook.com/ajax/bz?__a=1&__ccg=EXCELLENT&__comet_req=15&__hs=20711.HYP%3Acomet_loggedout_pkg.2.1...0&__hsi=7685737946399345887&__req=1&__rev=1047561935&__s=3yxgdk%3A7nequi%3Afrkjsz&__spin_b=trunk&__spin_r=1047561935&__spin_t=1789475313&__user=0&dpr=1&jazoest=22207&lsd=AdSSMv9-Y3G33MejDtHesE4iFcs&ph=C3&qpl_active_flow_ids=516759801 | XHR | 200 | 0 KiB |
| https://www.facebook.com/ajax/bz?__a=1&__ccg=EXCELLENT&__comet_req=15&__hs=20711.HYP%3Acomet_loggedout_pkg.2.1...0&__hsi=7685737946399345887&__req=2&__rev=1047561935&__s=3yxgdk%3A7nequi%3Afrkjsz&__spin_b=trunk&__spin_r=1047561935&__spin_t=1789475313&__user=0&dpr=1&jazoest=22207&lsd=AdSSMv9-Y3G33MejDtHesE4iFcs&ph=C3&qpl_active_flow_ids=175125627%2C516759801 | XHR | 200 | 0 KiB |
| https://www.instagram.com/accounts/xuserid/ | XHR | 200 | 0 KiB |
| data:text/css; charset=utf-8,.urhKlDZU.urhKlDZU%7Bposition%3Aabsolute%7D.mem4.mem4%7Btop%3A3em%7D%0A | Stylesheet | 200 | 0 KiB |
| data:application/x-javascript; charset=utf-8;base64,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 | Script | 200 | 0 KiB |
Long tasks (>50 ms)
| Start | Duration |
|---|---|
| 493 ms | 56 ms |