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. 6 tools.
search-stores-toolresolve-store-deeplink-toolsearch-campaigns-toolresolve-campaign-deeplink-toolsearch-in-store-products-toolbrand-tool
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“Dołącz za darmo”
search“Szukaj sklepów, produktów i kategorii”
Context
3 sites in the index share the category cashback service, 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 negotiation, Markdown twin at a predictable URL, llms.txt. 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
RefunderRefunder offers cashback on online purchases from over 1,200 stores with secure login via
cashback service RefunderRefunder is a Swedish cashback service offering users money back on online purchases from
cashback service Orbit SignalOrbit Signal is a Polish platform aggregating data on space sector companies, satellites,
space sector data platform GetName.plGetName.pl is a marketplace to browse and buy premium .pl domains with SEO metrics and auc
domain marketplace GrunerGruner is an authorized dealer of Husqvarna products offering promotional prices and free
authorized dealer Kaheli — Świece SojowePolish brand Kaheli offers handmade soy candles, diffusers, wax melts, and gift sets with
handmade soy candles GamerinaPrinxy.pl offers free online games for girls including dress-up, makeup, and fashion simul
online games platform Record generated from a live database query. Method: about the index.