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 crossmint.main-kill-isr.mintlify.me — the standard set for sites on mintlify.
search_crossmint_docsquery_docs_filesystem_crossmint_docssubmit_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
search“Search... ⌘ K”
Context
80 sites in the index share the category developer documentation, of which 22 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
Scalekit DocsDocumentation for auth, provider connections, and tool execution for AI agents and SaaS ap
developer documentation Inworld AI DocumentationDeveloper documentation for Inworld AI including TTS, STT, Realtime Speech-to-Speech, and
developer documentation Cloudflare DocsCloudflare Developer Docs provide guides and tutorials for building on Cloudflare's platfo
developer documentation Inworld AI DocumentationDeveloper documentation for Inworld AI APIs including text-to-speech, speech-to-text, real
developer documentation bunny.net DocumentationDeveloper documentation for bunny.net including quickstarts, API reference, CLI, integrati
developer documentation Cantor8 DocumentationDeveloper documentation for Cantor8, an infrastructure layer for the Canton Network suppor
developer documentation DittoDitto provides developer tools and an API to manage and synchronize product text across de
developer documentation TelnyxTelnyx Developer Docs provide technical documentation for building, hosting, and connectin
developer documentation Record generated from a live database query. Method: about the index.