What we tested
Probed live on 26 Sep 2026 against rubric v1.2. 3 of 5 checks passed. 2 unknown.
PROBE-VERIFIEDtier 2 of 3
✓MCP server card/.well-known/mcp/server-card.json · present; its server answers
not scored —Platform-suppliedno
not scored —Other agent files at well-known pathsagent-skills/index.json · oauth-authorization-server · oauth-protected-resource · http-message-signatures-directory · none found
not scored What its MCP server offers
We connected, ran tools/list, and recorded what came back on 26 Sep 2026. 5 tools.
search_diamondsget_diamondlookup_certificateprice_checkmarket_overview
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“”https://carathunter.com/us/pricing
Context
1,031 sites in the index share the category jewellery and watches. 792 transactional sites share it.
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?
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
HerreiraBrazilian brand Herreira offers fine luxury semijoias including earrings, necklaces, rings, bracelets, pendants, chokers, and sets with 18k gold plating, fusion stones, and rock crystals, selling wholesale and retail from Goiânia and São Paulo.
jewellery and watches Curly's Beads and Gift ShopBead store and gift shop offering beads, jewelry-making supplies, and related products, plus events and classes, serving customers online in English.
jewellery and watches Ada DiamondsNew York City jeweler selling custom engagement rings, loose lab grown diamonds, wedding bands, and fine jewelry made to order. Offers live inventory search, buying guides, showroom info, and consultation requests.
jewellery and watches Cannes BijoutierIndependent directory and expertise service for high-end jewelers in Cannes and the Côte d'Azur, offering verified jewelers, gold buyback at daily rates, gemological and numismatic expertise.
jewellery and watches Unbridaled Developer HubAPI platform for diamond and jewelry marketplace integrations, enabling diamond searches, product queries, order placement, merchant template management, inventory and pricing data access.
jewellery and watches Maison Or & Bijoux CannesJewelry and precious metals shop in Cannes, Côte d'Azur, specializing in buying, selling, and appraising gold, silver, luxury watches, and numismatic coins with free estimates and immediate payment.
jewellery and watches Maison Or & Bijoux MouginsMaison Or & Bijoux in Mougins, France, specializes in buying, selling, redeeming, and appraising gold, silver, jewelry, and collectible coins with free estimates and immediate payment.
jewellery and watches Kumar JewelersIndian jewelry store in Fremont, CA offering bridal sets, engagement rings, 22K/24K gold, diamond jewelry, custom design, repair, and bullion conversion services since 1970.
jewellery and watches Record generated from a live database query. Method: about the index.
How we found this site: probe discovery. This site didn’t declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. How we choose what to check, and how to opt out →