www.irs.gov

Report from 7/23/2026, 12:55:42 PM https://www.irs.gov/
Latest run · lab, cold cache
61
7/23/2026
28-day score · p75 · the standard
61
21 runs
CRR98%latest
SSD31%latest
TC1287 toklatest
TTFUT33 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/irs.gov.svg)](https://agentvitals.dev/results?url=https%3A%2F%2Fwww.irs.gov%2F)
<a href="https://agentvitals.dev/results?url=https%3A%2F%2Fwww.irs.gov%2F"><img src="https://agentvitals.dev/badge/irs.gov.svg" alt="Core Agent Vitals" height="20"></a>
What AI tells your customers about youAgent confidence: LOW
🟡Business nameInternal Revenue Service | An official website of the United States government · guessed from page text (no structured data)
Categorynot found
🟡Price$1,00 · guessed from page text (no structured data)
Locationnot applicable · not applicable to this page type
Hoursnot applicable · not applicable to this page type
Productsnot applicable · not applicable to this page type
🟡DescriptionPay your taxes. Get your refund status. Find IRS forms and answers to tax questions. We help you understand and meet your federal tax responsibilities. · guessed from page text (no structured data)

An agent is likely to fabricate missing details rather than say “I don’t know”. 0/4 applicable facts come from machine-readable structured data.

61
Overall score
weighted CAV (0–100)
FAIL
0–4950–8990–100

Metrics

98%
CRR Content Recovery Good
0.31
SSD Semantic Signal Density Poor
1,287 tok
TC Token Cost Good
61 ms
TTFUT Time to First Useful Token N/A

Token Cost breakdown

Where the page's tokens go (≈7,600 across regions). 57% is non-content — chrome and boilerplate an agent pays for. Add landmark roles (main/nav/header/footer) so agents can skip it.

Content
43.2% · 3,284
Chrome (nav / header / footer)
56.6% · 4,303
Boilerplate (cookie / ad)
0% · 0
Other
0.2% · 13

Final screenshot

Final screenshot of https://www.irs.gov/

Diagnostics

high SSD Low signal-to-noise for agents

content vs chrome/boilerplate

Evidencesignal 0.53 · 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 56.8% of tokens are non-content (boilerplate/chrome)

agent representation — token decomposition

EvidenceToken decomposition: content 43.2%, chrome 56.6%, boilerplate 0%, other 0.2%. Only 43.2% 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 78/100 · 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) Major AI bots allowed 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 (5)

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 (7)

✓ robots.txt allows AI bots✓ No CAPTCHA wall✓ No content-blocking cookie wall✓ Machine-readable prices✓ 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.

70Transport posture (0–100, unscored)
3pass
1warn
1fail
Per-header findings (6)
HeaderEvidence
✅ HTTPSserved over HTTPS
✅ HSTSmax-age=31536000
❌ Content-Security-Policyno content-security-policy header
✅ X-Content-Type-Optionsnosniff
⚠️ 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

highSplit the heaviest unused bundlehighest leverage

js — 152 KiB transferred, 73% unused (third-party)

EvidenceCDP JS coverage: 111 KiB of this bundle is never executed on load.
Impact~-111 KiB transfer; lower Token Cost + faster agent parse.
Effort30–90 min
FixDynamic-import() the below-the-fold parts of js, or drop unused dependencies. It is third-party — lazy-load or remove it.
highBreak up long main-thread tasks

longest task 392 ms (4 total)

EvidenceMain thread blocked 392 ms by the longest task.
ImpactFaster interactivity + content settling.
Effort1–4 h
FixSplit heavy work, defer third-party scripts, move compute off the main thread.
mediumCut third-party weight

googletagmanager.com — 605 KiB, 4 requests, 149 ms main-thread

EvidenceThird-party is 47% of total transfer (16 requests); googletagmanager.com is the largest.
ImpactFewer bytes + main-thread stalls before your content settles for an agent.
Effort1–3 h
FixLazy-load, self-host, or remove googletagmanager.com; defer non-critical third-party scripts.

Third-party impact

16 third-party requests · 725 KiB (47% of transfer) · 149 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.com4605 KiB149 ms
medallia.com577 KiB
addtoany.com329 KiB
digitalgov.gov214 KiB
google-analytics.com20 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-CSLL4ZEK4L&cx=c&gtm=4e67f0 3P152 KiB73%111 KiB
https://www.googletagmanager.com/gtag/js?id=G-ZY6FM95CS5&cx=c&gtm=4e67f0 3P158 KiB52.3%83 KiB
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L 3P152 KiB53.2%81 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-KV978ZL 3P142 KiB46.6%66 KiB
https://www.irs.gov/pub/js/js_Y_W3Nq689gnAKDUsxEj7viQs20bzztBCTnLYk_c2nC0.js?scope=footer&delta=2&language=en&theme=pup_irs&include=eJx1kWuWwiAMhTdUypI4KaSQkRImBEd3P61arXOcH5Dc74ZHALxnCcTFLVh6s_Cu3Q-FiDpACMpQrnZPxlm46DAxa1OBap-Zq4KOCh3NypXPKAeizFmpDj5xw2LvYZxw3kmQXiGPdzUEUMhwRbETJjgTSxvwopnKaa98yCEyx4xOIdq4Tn_1CF9weYfLUHt1a-fYGk2USbc-Fypuu-UEcvMnaGhj5gmyaaRoZgTtgu3m-hMGUhZXc49UDg_52f4Eb5Ukzc7wbRLFlNehL7wf7oXqAS-gPpmEW_ELYgSzfeGBlP5-542u0SResEJE40G4N8xPtyHIuvdz1V07qOSgK3teakZF-w__BYeK7n066 KiB76.8%51 KiB
https://resources.digital-cloud-gov.medallia.com/wdcgov/20103/onsite/generic1781552508589.js 3P68 KiB68%46 KiB
https://www.irs.gov/pub/js/js_JYhIGGEC82tGtBq8isMuB4p1lKxnxVHLUl6DlhxVChc.js?scope=footer&delta=0&language=en&theme=pup_irs&include=eJx1kWuWwiAMhTdUypI4KaSQkRImBEd3P61arXOcH5Dc74ZHALxnCcTFLVh6s_Cu3Q-FiDpACMpQrnZPxlm46DAxa1OBap-Zq4KOCh3NypXPKAeizFmpDj5xw2LvYZxw3kmQXiGPdzUEUMhwRbETJjgTSxvwopnKaa98yCEyx4xOIdq4Tn_1CF9weYfLUHt1a-fYGk2USbc-Fypuu-UEcvMnaGhj5gmyaaRoZgTtgu3m-hMGUhZXc49UDg_52f4Eb5Ukzc7wbRLFlNehL7wf7oXqAS-gPpmEW_ELYgSzfeGBlP5-542u0SResEJE40G4N8xPtyHIuvdz1V07qOSgK3teakZF-w__BYeK7n052 KiB51%27 KiB
https://www.irs.gov/static_assets/js/libs/jquery.min.js30 KiB73.2%22 KiB
https://static.addtoany.com/menu/modules/core.bycdb5qo.js 3P26 KiB82.8%22 KiB
https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=IRS 3P9 KiB64.2%6 KiB
https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js 3P5 KiB57%3 KiB
https://static.addtoany.com/menu/page.js 3P2 KiB29.9%1 KiB
https://www.irs.gov/modules/contrib/google_tag/js/gtag.js?thwzri1 KiB51.2%0 KiB
https://www.irs.gov/modules/contrib/google_tag/js/gtm.js?thwzri1 KiB33.1%0 KiB
https://resources.digital-cloud-gov.medallia.com/wdcgov/20103/onsite/embed.js 3P1 KiB11.3%0 KiB

Network

57Requests
1545 KiBTransferred
16Scripts
47%3rd-party
4Long tasks
Script (16)
867 KiB
Font (3)
289 KiB
Image (26)
267 KiB
Stylesheet (4)
88 KiB
Document (2)
24 KiB
XHR (2)
8 KiB
Other (2)
1 KiB
Fetch (2)
0 KiB
Heaviest requests (30)
URLTypeStatusTransfer
https://www.googletagmanager.com/gtag/js?id=G-ZY6FM95CS5&cx=c&gtm=4e67f0Script200158 KiB
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e67f0Script200152 KiB
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4LScript200152 KiB
https://www.googletagmanager.com/gtm.js?id=GTM-KV978ZLScript200142 KiB
https://www.irs.gov/themes/custom/pup_base/fonts/source-sans-pro/fonts/sourcesans3-regular.woff2Font200107 KiB
https://www.irs.gov/themes/custom/pup_base/fonts/source-sans-pro/fonts/sourcesans3-bold.woff2Font200106 KiB
https://www.irs.gov/themes/custom/pup_base/fonts/fontawesome-webfont.woff2?v=4.7.0Font20076 KiB
https://resources.digital-cloud-gov.medallia.com/wdcgov/20103/onsite/generic1781552508589.jsScript20068 KiB
https://www.irs.gov/pub/image/hp-grandpa-kids-538044394.jpgImage20067 KiB
https://www.irs.gov/pub/js/js_Y_W3Nq689gnAKDUsxEj7viQs20bzztBCTnLYk_c2nC0.js?scope=footer&delta=2&language=en&theme=pup_irs&include=eJx1kWuWwiAMhTdUypI4KaSQkRImBEd3P61arXOcH5Dc74ZHALxnCcTFLVh6s_Cu3Q-FiDpACMpQrnZPxlm46DAxa1OBap-Zq4KOCh3NypXPKAeizFmpDj5xw2LvYZxw3kmQXiGPdzUEUMhwRbETJjgTSxvwopnKaa98yCEyx4xOIdq4Tn_1CF9weYfLUHt1a-fYGk2USbc-Fypuu-UEcvMnaGhj5gmyaaRoZgTtgu3m-hMGUhZXc49UDg_52f4Eb5Ukzc7wbRLFlNehL7wf7oXqAS-gPpmEW_ELYgSzfeGBlP5-542u0SResEJE40G4N8xPtyHIuvdz1V07qOSgK3teakZF-w__BYeK7n0Script20066 KiB
https://www.irs.gov/pub/image/ta-logotype.pngImage20062 KiB
https://www.irs.gov/pub/js/js_JYhIGGEC82tGtBq8isMuB4p1lKxnxVHLUl6DlhxVChc.js?scope=footer&delta=0&language=en&theme=pup_irs&include=eJx1kWuWwiAMhTdUypI4KaSQkRImBEd3P61arXOcH5Dc74ZHALxnCcTFLVh6s_Cu3Q-FiDpACMpQrnZPxlm46DAxa1OBap-Zq4KOCh3NypXPKAeizFmpDj5xw2LvYZxw3kmQXiGPdzUEUMhwRbETJjgTSxvwopnKaa98yCEyx4xOIdq4Tn_1CF9weYfLUHt1a-fYGk2USbc-Fypuu-UEcvMnaGhj5gmyaaRoZgTtgu3m-hMGUhZXc49UDg_52f4Eb5Ukzc7wbRLFlNehL7wf7oXqAS-gPpmEW_ELYgSzfeGBlP5-542u0SResEJE40G4N8xPtyHIuvdz1V07qOSgK3teakZF-w__BYeK7n0Script20052 KiB
https://www.irs.gov/pub/css/css_T0W7b5U05-_iehyFvLRKKtlfdoFMMyLf8I2U-FU7ctY.css?delta=1&language=en&theme=pup_irs&include=eJx1kWFuwzAIhS9kx0eyiM0SVGIssNv19nOTZl2n7Y_F-3gCDJCSaCYpccPSLcC7jjfKCzYHOTeBcg9nMH2olObSKoYlZO0VeDrUE0amORzhlMzcqIshyValYGk21V6jUVkYYybF1ETv8ZX3Hhi1jQHaGlMDl-VWWCCPuuUSGWYc-XBS_6D-SX1bcUOHn-1Bz-me0lVQWBTqamfmRaZeap-ZbMXsHhOmC2Yao8XKfaHyY0F_p_-Cu3NhmYGjoV4p4WH8xXYf6d4DzWhm9MaULj6BSjfkb8e-fV-Vxg1OdlTz1u7jm4s79rvVsV-jhhvU8C6jXFGV8mhsCJrWCJUi9CaPKzA2DP9wZ3cbJcIMhu5KeLOwv9MmuTN-AaMg7PwStylesheet20052 KiB
https://www.irs.gov/pub/image/vita-recruit-hpsize.jpgImage20036 KiB
https://www.irs.gov/pub/image/flood-disaster-homepage.jpgImage20036 KiB
https://www.irs.gov/static_assets/js/libs/jquery.min.jsScript20030 KiB
https://static.addtoany.com/menu/modules/core.bycdb5qo.jsScript20026 KiB
https://www.irs.gov/pub/css/css_EbWGjClhsStXbsvwOq9iT6yGxHCg86ApUzr4bYwsoHk.css?delta=3&language=en&theme=pup_irs&include=eJx1kWFuwzAIhS9kx0eyiM0SVGIssNv19nOTZl2n7Y_F-3gCDJCSaCYpccPSLcC7jjfKCzYHOTeBcg9nMH2olObSKoYlZO0VeDrUE0amORzhlMzcqIshyValYGk21V6jUVkYYybF1ETv8ZX3Hhi1jQHaGlMDl-VWWCCPuuUSGWYc-XBS_6D-SX1bcUOHn-1Bz-me0lVQWBTqamfmRaZeap-ZbMXsHhOmC2Yao8XKfaHyY0F_p_-Cu3NhmYGjoV4p4WH8xXYf6d4DzWhm9MaULj6BSjfkb8e-fV-Vxg1OdlTz1u7jm4s79rvVsV-jhhvU8C6jXFGV8mhsCJrWCJUi9CaPKzA2DP9wZ3cbJcIMhu5KeLOwv9MmuTN-AaMg7PwStylesheet20026 KiB
https://www.irs.gov/pub/image/scamhomepage.jpgImage20025 KiB
https://www.irs.gov/Document20024 KiB
https://www.irs.gov/pub/image/woman-on-laptop.svgImage20016 KiB
https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=IRSScript2009 KiB
https://resources.digital-cloud-gov.medallia.com/wdcgov/20103/onsite/onsiteData1781552508182.jsonXHR2008 KiB
https://www.irs.gov/pub/css/css_F9jGjPOsSoSM96SWQ_jXailItuL5yVBOsZkcoWFm0wo.css?delta=0&language=en&theme=pup_irs&include=eJx1kWFuwzAIhS9kx0eyiM0SVGIssNv19nOTZl2n7Y_F-3gCDJCSaCYpccPSLcC7jjfKCzYHOTeBcg9nMH2olObSKoYlZO0VeDrUE0amORzhlMzcqIshyValYGk21V6jUVkYYybF1ETv8ZX3Hhi1jQHaGlMDl-VWWCCPuuUSGWYc-XBS_6D-SX1bcUOHn-1Bz-me0lVQWBTqamfmRaZeap-ZbMXsHhOmC2Yao8XKfaHyY0F_p_-Cu3NhmYGjoV4p4WH8xXYf6d4DzWhm9MaULj6BSjfkb8e-fV-Vxg1OdlTz1u7jm4s79rvVsV-jhhvU8C6jXFGV8mhsCJrWCJUi9CaPKzA2DP9wZ3cbJcIMhu5KeLOwv9MmuTN-AaMg7PwStylesheet2008 KiB
https://www.irs.gov/pub/image/freedom-250-logo.svgImage2006 KiB
https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.jsScript2005 KiB
https://www.irs.gov/libraries/accesible-slick-carousel/ajax-loader.gifImage2004 KiB
https://www.irs.gov/themes/custom/pup_base/IRS-Logo.svgImage2002 KiB
https://www.irs.gov/themes/custom/pup_irs/images/logo-print.svgImage2002 KiB
https://static.addtoany.com/menu/page.jsScript2002 KiB

Long tasks (>50 ms)

StartDuration
1044 ms392 ms
334 ms332 ms
1602 ms97 ms
1732 ms52 ms
Analyzing…
running mobile + desktop · ~30s