Every parse returns clean Markdown plus Litmus — twenty rule-based checks your agent can inspect before it trusts a page.
$0.005 per parse · 3 free tries a day
{
"url": "https://example.org/cohort-study",
"markdown": "# Study Finds Correlation Between Diet and Longevity …",
"litmus": {
"litmus_version": "2",
"verdict": "cite",
"flags": [],
"source": { "type": "news", "authority": 0.82 },
"authorship": { "present": true, "name": "Jane Chen", "kind": "person", "source": "jsonld" },
"content_type": { "type": "news_article" },
"outbound_authority": { "score": 0.71, "top_domains": ["who.int", "thelancet.com"] },
"citations": { "has_references": true, "external_links": 12, "external_per_1k_words": 3.2, "primary_domain_links": 5 },
"structured_data": { "json_ld": true, "schema_types": ["NewsArticle"], "open_graph": true, "canonical": "https://example.org/cohort-study", "meta_description": true },
"structural_trust_score": { "level": "high", "trust_factors": ["High-authority source", "Named authorship", "Dense citations"] },
"hedge_language": { "density": "low", "markers": 2 },
"content_density": { "thin_content": false, "ratio": 0.78 },
"boilerplate_ratio": { "ratio": 0.18, "confidence": "high" },
"quote_density": { "attributed_quotes": 3, "attribution_verbs": 5, "per_1k_words": 0.7 },
"freshness": { "published": "2026-01-14", "age_days": 276, "stale_warning": false, "correction_noted": false },
"page_status": { "is_error_page": false, "kind": null, "confidence": "high" },
"paywall": { "detected": false, "note": null },
"syndication": { "detected": false, "canonical_url": null },
"is_archived": { "wayback": true, "archive_today": false },
"redirects": { "final_url": "https://example.org/cohort-study", "hops": 0, "cross_domain": false },
"tldr": { "text": "A 20-year cohort study links the Mediterranean diet to a 7.3-year increase in average lifespan." },
"key_figures": [
{ "value": "7.3 yr", "context": "increase in life expectancy on the Mediterranean diet" },
{ "value": "24,200", "context": "participants across seven countries" }
],
"reading_time": { "minutes": 7 }
}
}
The signals only matter if they change what happens next. These four cover nearly every call an agent makes.
verdict is "cite" — authorship present, citations dense, density high,
no flags. The page says what it claims and shows its work. Cite it, and log the verdict.
page_status fires, or paywall is detected, or content is
truncated. The agent read a gate, not the article. Do not cite; retry elsewhere or escalate.
syndication is detected, or redirects crossed domains.
The content is real but you are holding a copy. Cite the original via canonical.
Thin content, heavy hedging, no citations, no authorship.
Treat it as opinion. Fine to mention, not fine to build on.
Who wrote it, and do they show their work?
source
Page type, authority score, and the reasoning behind it.
authorship
A named person, an organisation, or nobody — and where it was found.
content_type
What the page actually is, not what the URL suggests.
outbound_authority
A score plus the domains it links out to — primary sources or more blogs.
citations
References section, external links, and links per 1,000 words.
structured_data
JSON-LD schema, OpenGraph, and the canonical URL.
Is it substance, or hedging and bare assertion?
structural_trust_score
High, medium or low — with the factors behind it, so it can be inspected.
hedge_language
Density of "reportedly", "some say", "allegedly" — claim vs rumour.
content_density
Thin-content flag plus ratio of substantive sentences.
boilerplate_ratio
How much is nav, ads and furniture. High + low density is the content-farm shape.
quote_density
Attributed quotes and attribution verbs per 1,000 words.
Trust is where false confidence hides. These five don't ask a model — they count what's actually on the page.
Is it even the page you asked for?
freshness
Published date, age, Last-Modified, staleness, and corrections.
page_status
Soft 404, login wall, captcha, JS shell. A 200 is not proof you got the article.
paywall
Detected or not, with a note — a gate never passes as content.
syndication
Is this a copy of something published elsewhere? Cite the original.
is_archived
Presence in the Wayback Machine and archive.today.
redirects
Final URL, hop count, and whether it crossed domains.
What does it say, and what does it cost you in context?
Every signal is rule-based and extractive — no model, no temperature. A given page and a given Litmus version produce the same signals every time, so the verdict can be logged and audited.
Nearly every signal comes from the rendered page itself — the DOM, the Markdown, the response
headers. tldr is extractive: it selects the page's strongest sentence, it
does not write one.
Two signals check the wider web: is_archived queries the Wayback Machine and
archive.today, and source.authority leans on a domain reference list. These can
change over time — which is why the version is pinned.
Full thresholds and word lists are published in the methodology reference — see the MCP repo.
No account, no wallet. Three free tries, then $0.005 per parse.
<html> <head> <script>!function(f,b,e,v,n,t,s){if(f.fbq)return;n=f.fbq=function() {n.callMethod?n.callMethod.apply(n,arguments):n.queue.push(arguments)};if( !f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';n.queue=[];t=b.creat eElement(e);t.async=!0;t.src=v;s=b.getElementsByTagName(e)[0];s.parentNode. insertBefore(t,s)}(window,document,'script','https://connect.facebook.net/en _US/fbevents.js');</script> <link rel="stylesheet" href="/bundle.7f8a3c.css"> </head> <body class="template-article"> <div class="top-banner-ad"> <iframe src="https://ad.doubleclick.net/..."></iframe> </div> <nav id="sticky-header"> <ul><li><a href="/">Home</a></li> <li><a href="/sports">Sports</a></li> <li><a href="/opinion">Opinion</a></li></ul> </nav> <aside class="sidebar"> <div class="trending-widget">Most Read</div> <div class="newsletter-cta">Sign up for our newsletter</div> </aside> <div id="content"> <div class="article-header"> <h1>Study Finds Correlation Between Diet and Longevity</h1> </div> <p>A comprehensive 20-year study published in <em>The Lancet</em> has found a strong correlation between dietary patterns and increased lifespan.</p> <table class="data-table"> <thead><tr><th>Diet</th><th>Avg Lifespan</th><th>Sample</th></tr></thead> <tbody><tr><td>Mediterranean</td><td>83.4 yr</td><td>n=12,400</td></tr> <tr><td>Standard Western</td><td>76.1 yr</td><td>n=11,800</td></tr></tbody> </table> <div class="in-article-ad"> <img src="/ad-300x250.jpg" alt="Sponsored"> </div> </div> <footer> <div class="cookie-banner">We use cookies to improve your experience.</div> <div class="related-articles">You may also like...</div> <div class="comments-section">42 Comments</div> </footer> </body> </html>
# Study Finds Correlation Between Diet and Longevity *By Jane Chen, Health Correspondent* A comprehensive 20-year study published in *The Lancet* has found a strong correlation between dietary patterns and increased lifespan. | Diet | Avg Lifespan | Sample | | ----------------- | ------------ | --------- | | Mediterranean | 83.4 yr | n=12,400 | | Standard Western | 76.1 yr | n=11,800 | Researchers noted that participants following a Mediterranean diet showed a 7.3-year increase in average life expectancy compared to the control group. The study controlled for socioeconomic factors and exercise habits across 24,200 participants in seven countries.
{
"source": { "type": "news", "authority": 0.82 },
"freshness": { "published": "2026-01-14", "age": "7 months ago" },
"tldr": "20-year study links Mediterranean diet to a 7.3-year increase in average lifespan.",
"structural_trust_score": { "level": "high", "trust_factors": ["High-authority source"] },
"content_type": "news_article"
}
No account, no wallet — three free tries per IP per day, then $0.005 per parse via x402.