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
search“Search”https://usmetalindex.com/search
book“get tickets”
register“Submit a Band”https://usmetalindex.com/submit
Context
8 sites in the index share the category music directory, of which 8 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
California Metal IndexDirectory listing over 1500 California metal bands with genre browsing, concert info, musi
music directory Florida Metal IndexDirectory listing over 500 Florida metal bands with genre browsing, concert listings, musi
music directory New York Metal IndexDirectory of over 900 New York metal bands with genre browsing, concert listings, music st
music directory Ohio Metal IndexDirectory listing over 600 Ohio metal bands with genre browsing, concert listings, music s
music directory Pennsylvania Metal IndexDirectory listing over 650 Pennsylvania metal bands with genre browsing, concert listings,
music directory South American Metal IndexDirectory listing over 4000 South American metal bands with genre browsing, concert info,
music directory Texas Metal IndexDirectory listing over 1500 Texas metal bands with genre browsing, concert info, music str
music directory EFROSEFROS provides cybersecurity, managed IT, 24/7 SOC, and AI governance services under one S
cybersecurity managed services provider Record generated from a live database query. Method: about the index.