ARC INDEX · SUPPLEMENTS
Supplements: which brands do agents choose?
Free, neutral and open: dated checks of whether agents can reach a store, read its products and get to checkout, across every protocol. The data is CC-BY.
10 of 10 supplements stores are in this view. Ranked by the browser-lane score. Checkout is the real agent-catalog link and does not change that score. A store with no finished test is not ranked, and it is not a zero. State of agent checkout.
Agents can cite /api/ask?category=supplements. No login.
What Grok tells shoppers is a real model call via API, checked against the store's pages, not the consumer Grok app. Whether agents reach checkout is two lanes: a real HTTP check of the store's agent catalog, and five ARC browser cart tests. Those attempts are not a live Muse, Instinct, Grok Bot, OpenAI dots, or OpenClaw session. The score is the browser lane. The catalog check does not change it.
- Rank 1GrünsScore 86Browser 5 of 5Agent checkout YesAdded to cart (stopped before payment)
- Rank 2HuelScore 86Browser 5 of 5Agent checkout NoAdded to cart (stopped before payment)
- Rank 3Liquid I.V.Score 86Browser 5 of 5Agent checkout YesAdded to cart (stopped before payment)
- Rank 4MomentousScore 86Browser 5 of 5Agent checkout YesAdded to cart (stopped before payment)
- Rank 5MUD\WTRScore 83Browser 4 of 5Agent checkout YesCouldn't add it to the cart
- Rank 6Vital ProteinsScore 83Browser 4 of 5Agent checkout NoCouldn't add it to the cart
- Rank 7RitualScore 79Browser 4 of 5Agent checkout YesCouldn't add it to the cart
- Rank 8SeedScore 45Browser 1 of 5Agent checkout NoCouldn't add it to the cart
- Rank 9Four SigmaticScore 35Browser 0 of 5Agent checkout YesCouldn't add it to the cart
- Rank 10LMNTScore 13Browser 0 of 5Agent checkout NoStore blocks automated agents at the door