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 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“stripe projects create my-app”
Context
10 sites in the index share the category developer tool, of which 3 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 twin at a predictable URL, llms.txt, MCP server answers. 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
GitWhyGitWhy documents and manages reasoning behind AI-generated code changes linked to git comm
developer tool PackmindPackmind is a developer tool that centralizes AI coding instructions and standards for eng
developer tool partiopartio is an open-source CLI tool that captures AI agent sessions alongside Git commits to
developer tool AgentStackAgentStack provides documentation for a CLI tool to scaffold and develop agent projects qu
developer tool SessionBaseSessionBase is a developer tool for capturing, storing, and sharing AI chat sessions with
developer tool ShadowGit DocumentationShadowGit documents a tool that saves every code change and feeds history to AI assistants
developer tool Stylebit documentationStylebit provides a CLI and web app to detect and analyze design system usage across proje
developer tool Starter KitDocumentation for Depth AI, a tool that enables chat and analysis of codebases with API an
developer tool Record generated from a live database query. Method: about the index.