What we tested
Probed live on 23 Aug 2026 against rubric v1. 2 of 5 checks passed.
PROBE-VERIFIEDtier 2 of 3
—Markdown negotiationAccept: text/markdown
—Markdown twin at a predictable URL/page.md
✓llms.txt/llms.txt
—API catalogRFC 9727
✓MCP server answers/.well-known/mcp/server-card.json → tools/list
What its MCP server offers
We connected, ran tools/list, and recorded what came back on 23 Aug 2026. 3 tools, served from langchain-5e9cc07a.main-kill-isr.mintlify.me — the standard set for sites on mintlify.
search_docs_by_lang_chainquery_docs_filesystem_docs_by_lang_chainsubmit_feedback
What an agent could do here
Read from the page’s own content, with the wording each was drawn from. Inference is kept separate from tested facts — an agent completing the action is tier 3.
UNVERIFIED
register“Sign up for LangSmith Start with LangSmith for free. Sign up”https://www.langchain.com/langsmith
track“LangSmith status Real-time status of LangSmith services and APIs. View”https://status.langchain.com
contact“Support portal Submit tickets and track support requests. Visit”https://support.langchain.com
search“Search... ⌘ K”https://docs.langchain.com/search
Context
15 sites in the index share the category software development documentation, of which 4 are transactional.
How we grade
Three tiers. Every listing shows which one it has reached, and when. The rubric.
tier 1Declared
The site says agents are welcome in its robots.txt. A permission, not a capability.
tier 2Probe-verified
We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
tier 3Behaviourally verified
An agent completed the action end to end — booked, bought, submitted — and it worked.
Own this site?
3 checks did not pass when we last looked: Markdown negotiation, Markdown twin at a predictable URL, API catalog. Each is a small, specific fix; the rubric says exactly what we look for.
Behavioural verification — an agent completing your booking, purchase or contact flow end to end, with the date published here — opens to a small founding cohort first. Leave an email to be in it.
Related verified sites
Fhenix DocumentationFhenix Documentation provides resources to build privacy-preserving smart contracts using
software development documentation BenchFlowBenchFlow documentation provides installation instructions, authentication options, and us
software development documentation CrewFormCrewForm documentation provides a quickstart guide to set up and run a multi-agent AI syst
software development documentation FirebenderFirebender Documentation provides detailed information and resources for using the Fireben
software development documentation PotpiePotpie provides documentation for a context engine enabling multi-hop reasoning for debugg
software development documentation SkaroDocumentation for Skaro, an AI-powered SDLC orchestration platform, including setup, confi
software development documentation adro.codesadro.codes provides a documentation index and articles on software development, design, an
software development documentation Galadriel DocsDocumentation for Galadriel's Sentience SDK enabling developers to build autonomous, verif
software development documentation Record generated from a live database query. Method: about the index.