LangChain
No change since 1 Aug 2026
Embed your badge ↗LangChain scores 56 out of 100 on the a14y v0.3.0-draft scorecard. The scan covered 2 pages, and 63% of the applicable checks passed. The site publishes an XML sitemap; llms.txt, AGENTS.md, and a markdown sitemap are absent.
Site checks · 5/15 passed
Evaluated once against the site's origin: discoverability surfaces like
llms.txt, AGENTS.md, and sitemap signals.
- FAIL llms-txt.exists https://docs.langchain.com/oss/python/langchain/overview returned an HTML page, not an llms.txt file
- WARN llms-txt.content-type Content-Type is "text/html; charset=utf-8", expected text/plain
- PASS llms-txt.non-empty
- FAIL llms-txt.md-extensions 3/3 links are not .md/.mdx
- PASS robots-txt.exists https://docs.langchain.com/oss/python/langchain/overview
- FAIL robots-txt.allows-ai-bots Blocks: GPTBot, ClaudeBot, CCBot, Google-Extended
- FAIL robots-txt.allows-llms-txt robots.txt disallows: https://python.langchain.com/llms.txt, https://python.langchain.com/.well-known/llms.txt
- PASS sitemap-xml.exists https://docs.langchain.com/oss/python/langchain/overview
- FAIL sitemap-xml.valid sitemap.xml did not parse as urlset/sitemapindex
- FAIL sitemap-md.exists https://docs.langchain.com/oss/python/langchain/overview returned an HTML page, not a sitemap.md file
- FAIL sitemap-md.has-structure sitemap.md is missing headings or links
- FAIL agents-md.exists https://docs.langchain.com/oss/python/langchain/overview returned an HTML page, not an agent skill file
- FAIL agents-md.has-min-sections Found only: (none)
- PASS discovery.no-duplicate-content 2 URLs, no duplicate canonicals
- PASS discovery.in-page-link a top-level page links to an agent file
Pages · 2
Each page was audited against the same scorecard. Click a page to expand its check results.
75 https://docs.langchain.com/oss/python/langchain/overview 21/28
- PASS http.status-200 200
- PASS http.redirect-chain 1 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- PASS html.canonical-link https://docs.langchain.com/oss/python/langchain/overview
- PASS html.meta-description 167 chars
- PASS html.og-title
- PASS html.og-description
- PASS html.lang-attribute en
- PASS html.json-ld 1 block(s)
- PASS html.json-ld.date-modified 2026-07-26T11:03:07.648Z
- FAIL html.json-ld.breadcrumb no BreadcrumbList node
- PASS html.headings 16 headings
- PASS html.text-ratio 78.2%
- FAIL html.glossary-link no glossary/terminology link
- PASS markdown.mirror-suffix https://docs.langchain.com/oss/python/langchain/overview.md
- PASS markdown.alternate-link /oss/python/langchain/overview.md
- FAIL markdown.frontmatter missing: title, description, doc_version, last_updated
- FAIL markdown.canonical-header no Link header
- PASS markdown.content-negotiation text/markdown; charset=utf-8
- FAIL markdown.sitemap-section no "## Sitemap" heading in mirror
- FAIL code.language-tags 10/10 blocks missing language
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS markdown.navigation-stripped
- PASS markdown.size-reduction 98.8% smaller (11149B vs 938844B)
- PASS markdown.valid-markdown 10.5% HTML markup
- PASS html.ssr-content 1013 words in initial HTML
- PASS http.no-interstitial
67 https://interrupt.langchain.com/ 14/21
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- PASS html.meta-description 156 chars
- PASS html.og-title
- PASS html.og-description
- PASS html.lang-attribute en
- PASS html.json-ld 1 block(s)
- FAIL html.json-ld.date-modified no dateModified anywhere in JSON-LD
- FAIL html.json-ld.breadcrumb no BreadcrumbList node
- PASS html.headings 4 headings
- PASS html.text-ratio 31.4%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- PASS discovery.indexed
- PASS html.ssr-content 67 words in initial HTML
- PASS http.no-interstitial