{"ok":true,"service":"ARC","north_star":"The open benchmark of whether AI agents can reach checkout, for every store, agent and protocol.","read_without_login":true,"does_not_start_a_scan":true,"honesty":{"cart_attempts":"browser","grok_fact_check":"One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","agent_rails":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score.","affiliation":"Not affiliated with or endorsed by Meta, Spear Street Technology, SpaceXAI, OpenAI, or the OpenClaw Foundation."},"query":{"url":null,"brand":null,"category":"supplements","q":null},"matched_by":"category","category":"supplements","category_label":"Supplements","category_page":"https://www.arcreport.ai/agent-index/category/supplements","note":"Ranked Supplements stores from the ARC Index. A missing score is not a zero.","matches":[{"brand":"Grüns","slug":"gruns","category":"supplements","category_label":"Supplements","homepage":"https://gruns.co","product_url":"https://gruns.co/products/electrolyte-blends-variety-pack","product_name":"Electrolyte Blends Variety Pack","page":"https://www.arcreport.ai/agent-index/gruns","badge":"https://www.arcreport.ai/agent-index/gruns/badge","agents_can_buy":true,"buy":{"verdict":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T00:11:42.000Z","status":"checkout","answers_catalog":true,"catalog_found":true,"checkout_link":true,"blocked":false,"has_rails":true},"browser":{"simulated":true,"could_buy":5,"shoppers":5,"stopped_at":null}},"verdict":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","could_buy":5,"shoppers":5,"score":86,"rank":1,"failure":"Added to cart (stopped before payment)","tested_at":"2026-10-05T11:03:12.000Z","status":"scored","rivals_grok_named":["Electrolit Variety Pack","Quince Everyday Electrolytes"],"grok_read":{"real":true,"status":"ready","would_recommend":false,"shock":"One AI model's read-back named Electrolit Variety Pack, or Quince Everyday Electrolytes instead.","note":"Checked 8 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-08T12:07:22.000Z"},"evidence":[{"fact":"price","label":"Price","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://gruns.co/products/electrolyte-blends-variety-pack"},{"fact":"returns_window","label":"Returns window","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://gruns.co/policies/refund-policy"},{"fact":"shipping_cost","label":"Shipping cost","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://gruns.co/policies/shipping-policy"},{"fact":"availability","label":"Availability","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://gruns.co/products/electrolyte-blends-variety-pack"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://gruns.co/policies/shipping-policy"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T00:11:42.000Z","checkout_webmcp":{"status":"measured","detected":true,"tools":["get_checkout","update_checkout","complete_checkout"]},"webmcp":true,"storefront_mcp":true,"catalog_tool":"search_catalog","catalog_found":true,"cart_link":true,"ucp_profile":"valid","summary":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","fix":null,"note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"Huel","slug":"huel","category":"supplements","category_label":"Supplements","homepage":"https://huel.com","product_url":"https://huel.com/products/huel-black-edition","product_name":"Huel Black Edition","page":"https://www.arcreport.ai/agent-index/huel","badge":"https://www.arcreport.ai/agent-index/huel/badge","agents_can_buy":true,"buy":{"verdict":"No agent catalog found in this check. All 5 browser cart shoppers added the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","status":"none","answers_catalog":false,"catalog_found":null,"checkout_link":false,"blocked":false,"has_rails":false},"browser":{"simulated":true,"could_buy":5,"shoppers":5,"stopped_at":null}},"verdict":"No agent catalog found in this check. All 5 browser cart shoppers added the product to the cart.","could_buy":5,"shoppers":5,"score":86,"rank":2,"failure":"Added to cart (stopped before payment)","tested_at":"2026-10-05T11:01:29.000Z","status":"scored","rivals_grok_named":["Soylent","Jimmy Joy Plenny"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 8 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-08T10:52:20.000Z"},"evidence":[{"fact":"price","label":"Price","status":"mismatch","grok_said":"$45 per bag or $2.65 per meal","store_says":"$60–$126.65","quote":"\"price\":\"81.25\"","source":"schema.org JSON-LD","url":"https://huel.com/products/huel-black-edition"},{"fact":"returns_window","label":"Returns window","status":"match","grok_said":"30 days","store_says":"30 days","quote":"If it’s just not right for you, let us know within 30 days of delivery by submitting a returns request and referencing the Money","source":"Policy page","url":"https://huel.com/pages/returns-policy"},{"fact":"shipping_cost","label":"Shipping cost","status":"couldnt_verify","grok_said":"$9.99 standard, free over $65","store_says":null,"quote":null,"source":null,"url":"https://huel.com/pages/delivery-questions"},{"fact":"availability","label":"Availability","status":"match","grok_said":"in stock","store_says":"in stock in 14 of 14 sizes","quote":"\"availability\":\"https://schema.org/InStock\"","source":"schema.org JSON-LD","url":"https://huel.com/products/huel-black-edition"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"match","grok_said":"3-6 business days","store_says":"3–10 days","quote":"Our standard shipping in the US typically takes 3 - 6 business days, with Alaska and Hawaii occasionally taking up to 10 business days.","source":"Policy page","url":"https://huel.com/pages/delivery-questions"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","checkout_webmcp":{"status":"unavailable","detected":null,"tools":[],"reason":"no available variant"},"webmcp":false,"storefront_mcp":false,"catalog_tool":null,"catalog_found":null,"cart_link":false,"ucp_profile":"absent","summary":"No agent catalog found in this check. All 5 browser cart shoppers added the product to the cart.","fix":"Expose a catalog agents can query over HTTP. On Shopify, enable search_catalog or search_shop_catalog at /api/ucp/mcp or /api/mcp and publish the /.well-known/ucp profile.","note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"Liquid I.V.","slug":"liquid-iv","category":"supplements","category_label":"Supplements","homepage":"https://www.liquid-iv.com","product_url":"https://www.liquid-iv.com/products/lemon-lime-hydration-multiplier-multiserve","product_name":"Hydration Multiplier","page":"https://www.arcreport.ai/agent-index/liquid-iv","badge":"https://www.arcreport.ai/agent-index/liquid-iv/badge","agents_can_buy":true,"buy":{"verdict":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","status":"checkout","answers_catalog":true,"catalog_found":true,"checkout_link":true,"blocked":false,"has_rails":true},"browser":{"simulated":true,"could_buy":5,"shoppers":5,"stopped_at":null}},"verdict":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","could_buy":5,"shoppers":5,"score":86,"rank":3,"failure":"Added to cart (stopped before payment)","tested_at":"2026-10-06T18:17:13.000Z","status":"scored","rivals_grok_named":["LMNT","Nuun","BIOptimizers Electrolyte Breakthrough"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 7 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-07T22:52:22.000Z"},"evidence":[{"fact":"price","label":"Price","status":"match","grok_said":"Multiserve from $38.99","store_says":"$38.99","quote":"\"price\":38.99","source":"schema.org JSON-LD","url":"https://www.liquid-iv.com/products/lemon-lime-hydration-multiplier-multiserve"},{"fact":"returns_window","label":"Returns window","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://www.liquid-iv.com/pages/shipping-and-return-policy"},{"fact":"shipping_cost","label":"Shipping cost","status":"couldnt_verify","grok_said":"Free over $40","store_says":null,"quote":null,"source":null,"url":"https://www.liquid-iv.com/pages/shipping-and-return-policy"},{"fact":"availability","label":"Availability","status":"match","grok_said":"in stock","store_says":"in stock","quote":"\"availability\":\"https://schema.org/InStock\"","source":"schema.org JSON-LD","url":"https://www.liquid-iv.com/products/lemon-lime-hydration-multiplier-multiserve"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://www.liquid-iv.com/pages/shipping-and-return-policy"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","checkout_webmcp":{"status":"unavailable","detected":null,"tools":[],"reason":"no available variant"},"webmcp":false,"storefront_mcp":true,"catalog_tool":"search_catalog","catalog_found":true,"cart_link":true,"ucp_profile":"valid","summary":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","fix":null,"note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"Momentous","slug":"momentous","category":"supplements","category_label":"Supplements","homepage":"https://www.livemomentous.com","product_url":"https://www.livemomentous.com/products/daily-hydration","product_name":"Daily Hydration","page":"https://www.arcreport.ai/agent-index/momentous","badge":"https://www.arcreport.ai/agent-index/momentous/badge","agents_can_buy":true,"buy":{"verdict":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:44.000Z","status":"checkout","answers_catalog":true,"catalog_found":true,"checkout_link":true,"blocked":false,"has_rails":true},"browser":{"simulated":true,"could_buy":5,"shoppers":5,"stopped_at":null}},"verdict":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","could_buy":5,"shoppers":5,"score":86,"rank":4,"failure":"Added to cart (stopped before payment)","tested_at":"2026-10-05T10:33:54.000Z","status":"scored","rivals_grok_named":["LMNT","Liquid I.V.","Nuun"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 8 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-08T08:52:20.000Z"},"evidence":[{"fact":"shipping_cost","label":"Shipping cost","status":"mismatch","grok_said":"Free over $99 US","store_says":"free","quote":"Free Shipping on U.S. Orders $99+ Use code: WELCOME10 for 10% your first order { this.updateButtonSta","source":"Policy page","url":"https://www.livemomentous.com/collections/shop-all"},{"fact":"price","label":"Price","status":"match","grok_said":"$24.99 one-time or $18.74 subscribe","store_says":"$18.74, $24.99","quote":"\"price\": 24.99","source":"schema.org JSON-LD","url":"https://www.livemomentous.com/products/daily-hydration"},{"fact":"returns_window","label":"Returns window","status":"couldnt_verify","grok_said":"30 days","store_says":null,"quote":null,"source":null,"url":"https://www.livemomentous.com/products/daily-hydration"},{"fact":"availability","label":"Availability","status":"match","grok_said":"in stock","store_says":"in stock in 4 of 4 sizes","quote":"\"availability\": \"https://schema.org/InStock\"","source":"schema.org JSON-LD","url":"https://www.livemomentous.com/products/daily-hydration"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://www.livemomentous.com/collections/shop-all"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:44.000Z","checkout_webmcp":{"status":"measured","detected":true,"tools":["get_checkout","update_checkout","complete_checkout"]},"webmcp":true,"storefront_mcp":true,"catalog_tool":"search_catalog","catalog_found":true,"cart_link":true,"ucp_profile":"valid","summary":"Agents can reach checkout through Shopify's agent catalog, and all 5 browser cart shoppers added the product to the cart.","fix":null,"note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"MUD\\WTR","slug":"mudwtr","category":"supplements","category_label":"Supplements","homepage":"https://mudwtr.com","product_url":"https://mudwtr.com/products/mud-wtr-rest-refill","product_name":"Rest","page":"https://www.arcreport.ai/agent-index/mudwtr","badge":"https://www.arcreport.ai/agent-index/mudwtr/badge","agents_can_buy":true,"buy":{"verdict":"Agents can reach checkout through Shopify's agent catalog. 4 of 5 browser cart shoppers also added the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:44.000Z","status":"checkout","answers_catalog":true,"catalog_found":true,"checkout_link":true,"blocked":false,"has_rails":true},"browser":{"simulated":true,"could_buy":4,"shoppers":5,"stopped_at":"adding the product to the cart"}},"verdict":"Agents can reach checkout through Shopify's agent catalog. 4 of 5 browser cart shoppers also added the product to the cart.","could_buy":4,"shoppers":5,"score":83,"rank":5,"failure":"Couldn't add it to the cart","tested_at":"2026-10-06T18:32:41.000Z","status":"scored","rivals_grok_named":["Four Sigmatic","Rasa","Laird Superfood"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 8 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-08T07:22:21.000Z"},"evidence":[{"fact":"price","label":"Price","status":"match","grok_said":"From $40 for 30 servings","store_says":"$40","quote":"\"price\":4000","source":"Shopify product JSON","url":"https://mudwtr.com/products/mud-wtr-rest-refill"},{"fact":"returns_window","label":"Returns window","status":"match","grok_said":"30 days unopened","store_says":"30 days","quote":"not offer refunds for ANY REASON on orders placed more than 30 days from original purchase date.","source":"Policy page","url":"https://mudwtr.com/policies/refund-policy"},{"fact":"shipping_cost","label":"Shipping cost","status":"match","grok_said":"free on all orders","store_says":"free","quote":"can I track my shipment? Visit our Order Tracking page How much does shipping cost? U shipping Standard shipping is free for subscription orders in the U To speed up your subscription order, you ca","source":"Policy page","url":"https://mudwtr.com/pages/help-center"},{"fact":"availability","label":"Availability","status":"match","grok_said":"in stock","store_says":"in stock","quote":"\"available\":true","source":"Shopify product JSON","url":"https://mudwtr.com/products/mud-wtr-rest-refill"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://mudwtr.com/pages/help-center"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:44.000Z","checkout_webmcp":{"status":"measured","detected":true,"tools":["get_checkout","update_checkout","complete_checkout"]},"webmcp":true,"storefront_mcp":true,"catalog_tool":"search_catalog","catalog_found":true,"cart_link":true,"ucp_profile":"valid","summary":"Agents can reach checkout through Shopify's agent catalog. 4 of 5 browser cart shoppers also added the product to the cart.","fix":null,"note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"Vital Proteins","slug":"vital-proteins","category":"supplements","category_label":"Supplements","homepage":"https://www.vitalproteins.com","product_url":"https://www.vitalproteins.com/products/salted-caramel-collagen-peptides","product_name":"Salted Caramel Collagen Peptides","page":"https://www.arcreport.ai/agent-index/vital-proteins","badge":"https://www.arcreport.ai/agent-index/vital-proteins/badge","agents_can_buy":true,"buy":{"verdict":"The store answers Shopify's agent catalog, but a search did not return this product. 4 of 5 browser cart shoppers added the product to the cart. The rest get stuck at adding the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","status":"catalog_miss","answers_catalog":true,"catalog_found":false,"checkout_link":false,"blocked":false,"has_rails":true},"browser":{"simulated":true,"could_buy":4,"shoppers":5,"stopped_at":"adding the product to the cart"}},"verdict":"The store answers Shopify's agent catalog, but a search did not return this product. 4 of 5 browser cart shoppers added the product to the cart. The rest get stuck at adding the product to the cart.","could_buy":4,"shoppers":5,"score":83,"rank":6,"failure":"Couldn't add it to the cart","tested_at":"2026-10-06T18:19:27.000Z","status":"scored","rivals_grok_named":["Sports Research","Orgain","Ancient Nutrition"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 8 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-08T13:22:21.000Z"},"evidence":[{"fact":"shipping_cost","label":"Shipping cost","status":"mismatch","grok_said":"free over $50","store_says":"free","quote":"Code:GUMMIES25 Stay Vital Free Shipping on Subscription Orders *Packaging may vary Collagen Peptides Advanced with Hyaluronic Acid & Vitamin C $29 33oz with HA + Vitamin C $29 99 13 / serving 20oz with HA + Vitamin C $49 99 28 / serving…","source":"Policy page","url":"https://www.vitalproteins.com/products/collagen-peptides"},{"fact":"price","label":"Price","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://www.vitalproteins.com/products/salted-caramel-collagen-peptides"},{"fact":"returns_window","label":"Returns window","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://www.vitalproteins.com/pages/returns"},{"fact":"availability","label":"Availability","status":"match","grok_said":"in stock","store_says":"in stock in 2 of 2 sizes","quote":"\"availability\": \"https://schema.org/InStock\"","source":"schema.org JSON-LD","url":"https://www.vitalproteins.com/products/salted-caramel-collagen-peptides"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://www.vitalproteins.com/products/collagen-peptides"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","checkout_webmcp":{"status":"measured","detected":true,"tools":["get_checkout","update_checkout","complete_checkout"]},"webmcp":true,"storefront_mcp":true,"catalog_tool":"search_catalog","catalog_found":false,"cart_link":false,"ucp_profile":"valid","summary":"The store answers Shopify's agent catalog, but a search did not return this product. 4 of 5 browser cart shoppers added the product to the cart. The rest get stuck at adding the product to the cart.","fix":"The catalog tool answered, but it did not return this product. Publish the product on the sales channel that feeds the agent catalog, and confirm a search for its name returns the same product URL.","note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"Ritual","slug":"ritual","category":"supplements","category_label":"Supplements","homepage":"https://ritual.com","product_url":"https://ritual.com/products/essential-for-women-multivitamin","product_name":"Women's Multivitamin 18+","page":"https://www.arcreport.ai/agent-index/ritual","badge":"https://www.arcreport.ai/agent-index/ritual/badge","agents_can_buy":true,"buy":{"verdict":"Agents can reach checkout through Shopify's agent catalog. 4 of 5 browser cart shoppers also added the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:44.000Z","status":"checkout","answers_catalog":true,"catalog_found":true,"checkout_link":true,"blocked":false,"has_rails":true},"browser":{"simulated":true,"could_buy":4,"shoppers":5,"stopped_at":"adding the product to the cart"}},"verdict":"Agents can reach checkout through Shopify's agent catalog. 4 of 5 browser cart shoppers also added the product to the cart.","could_buy":4,"shoppers":5,"score":79,"rank":7,"failure":"Couldn't add it to the cart","tested_at":"2026-10-06T15:33:16.000Z","status":"scored","rivals_grok_named":["Nature Made","Centrum Women","Olly","One A Day"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 7 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-07T21:52:23.000Z"},"evidence":[{"fact":"price","label":"Price","status":"match","grok_said":"Sale price $26.40 from $33","store_says":"$26, $26.40","quote":"Vitamin E, from mixed tocopherols.* Sale price $26.40 Regular price $33.00 Un","source":"Product page","url":"https://ritual.com/products/essential-for-women-multivitamin"},{"fact":"returns_window","label":"Returns window","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://ritual.com/policies/refund-policy"},{"fact":"shipping_cost","label":"Shipping cost","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://ritual.com/products/essential-for-women-multivitamin"},{"fact":"availability","label":"Availability","status":"match","grok_said":"in stock","store_says":"in stock","quote":"\": { \"@type\": \"Offer\", \"priceCurrency\": \"USD\", \"price\": \"37.5\", \"availability\": \"InStock\", \"seller\": { \"@type\": \"Organization\", \"name\": \"Ritual\" } } ,\"aggregateRating\":","source":"Product page","url":"https://ritual.com/products/essential-for-women-multivitamin"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://ritual.com/products/essential-for-women-multivitamin"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:44.000Z","checkout_webmcp":{"status":"measured","detected":true,"tools":["get_checkout","update_checkout","complete_checkout"]},"webmcp":true,"storefront_mcp":true,"catalog_tool":"search_catalog","catalog_found":true,"cart_link":true,"ucp_profile":"valid","summary":"Agents can reach checkout through Shopify's agent catalog. 4 of 5 browser cart shoppers also added the product to the cart.","fix":null,"note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"Seed","slug":"seed","category":"supplements","category_label":"Supplements","homepage":"https://seed.com","product_url":"https://seed.com/daily-synbiotic","product_name":"DS-01 Daily Synbiotic","page":"https://www.arcreport.ai/agent-index/seed","badge":"https://www.arcreport.ai/agent-index/seed/badge","agents_can_buy":true,"buy":{"verdict":"The store answered the agent catalog check with a block page. 1 of 5 browser cart shoppers added the product to the cart. The rest get stuck at adding the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","status":"blocked","answers_catalog":false,"catalog_found":null,"checkout_link":false,"blocked":true,"has_rails":false},"browser":{"simulated":true,"could_buy":1,"shoppers":5,"stopped_at":"adding the product to the cart"}},"verdict":"The store answered the agent catalog check with a block page. 1 of 5 browser cart shoppers added the product to the cart. The rest get stuck at adding the product to the cart.","could_buy":1,"shoppers":5,"score":45,"rank":8,"failure":"Couldn't add it to the cart","tested_at":"2026-10-06T19:03:14.000Z","status":"scored","rivals_grok_named":["Klora Gut-Renew"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 8 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-08T09:52:20.000Z"},"evidence":[{"fact":"price","label":"Price","status":"couldnt_verify","grok_said":"$49.99 monthly","store_says":null,"quote":null,"source":null,"url":"https://seed.com/daily-synbiotic"},{"fact":"returns_window","label":"Returns window","status":"couldnt_verify","grok_said":"30 days","store_says":null,"quote":null,"source":null,"url":"https://seed.com/daily-synbiotic"},{"fact":"shipping_cost","label":"Shipping cost","status":"couldnt_verify","grok_said":"free US shipping","store_says":null,"quote":null,"source":null,"url":"https://seed.com/daily-synbiotic"},{"fact":"availability","label":"Availability","status":"couldnt_verify","grok_said":"in stock","store_says":null,"quote":null,"source":null,"url":"https://seed.com/daily-synbiotic"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"couldnt_verify","grok_said":"3-8 days","store_says":null,"quote":null,"source":null,"url":"https://seed.com/daily-synbiotic"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","checkout_webmcp":{"status":"not_applicable","detected":null,"tools":[]},"webmcp":false,"storefront_mcp":false,"catalog_tool":null,"catalog_found":null,"cart_link":false,"ucp_profile":"absent","summary":"The store answered the agent catalog check with a block page. 1 of 5 browser cart shoppers added the product to the cart. The rest get stuck at adding the product to the cart.","fix":"Let an identified agent fetch the catalog without a browser challenge. Return JSON-RPC from the catalog endpoints instead of a block page.","note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"Four Sigmatic","slug":"four-sigmatic","category":"supplements","category_label":"Supplements","homepage":"https://us.foursigmatic.com","product_url":"https://us.foursigmatic.com/products/mushroom-chocolate","product_name":"Mushroom Chocolate","page":"https://www.arcreport.ai/agent-index/four-sigmatic","badge":"https://www.arcreport.ai/agent-index/four-sigmatic/badge","agents_can_buy":true,"buy":{"verdict":"Agents can reach checkout through Shopify's agent catalog. Browser cart shoppers get stuck at adding the product to the cart.","agents_can_buy":true,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-06T08:30:23.000Z","status":"checkout","answers_catalog":true,"catalog_found":true,"checkout_link":true,"blocked":false,"has_rails":true},"browser":{"simulated":true,"could_buy":0,"shoppers":5,"stopped_at":"adding the product to the cart"}},"verdict":"Agents can reach checkout through Shopify's agent catalog. Browser cart shoppers get stuck at adding the product to the cart.","could_buy":0,"shoppers":5,"score":35,"rank":9,"failure":"Couldn't add it to the cart","tested_at":"2026-10-06T21:20:04.000Z","status":"scored","rivals_grok_named":["Om Mushroom","Host Defense","Real Mushrooms"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 9 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-09T18:22:22.000Z"},"evidence":[{"fact":"returns_window","label":"Returns window","status":"mismatch","grok_said":"60 days","store_says":"45 days","quote":"Items returned to us after 45 days of the initial purchase date and/or without contacting Four Sigma Foo","source":"Policy page","url":"https://us.foursigmatic.com/policies/refund-policy"},{"fact":"price","label":"Price","status":"couldnt_verify","grok_said":"$28 for 30 servings subscribed","store_says":"$70, $130, $190","quote":"\"sku\": \"816897021444-EA\"","source":"schema.org JSON-LD","url":"https://us.foursigmatic.com/products/mushroom-chocolate"},{"fact":"shipping_cost","label":"Shipping cost","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://us.foursigmatic.com/pages/contact-us?hcUrl=%2Fen-US%2Farticles%2Fordering-shipping-10792"},{"fact":"availability","label":"Availability","status":"match","grok_said":"in stock","store_says":"in stock","quote":"\", \"sku\": \"816897021444-EA\", \"gtin12\": \"816897021444\", \"availability\" : \"http://schema.org/InStock\", \"price\" : 70.0, \"priceCurrency\" : \"USD\", \"url\" : \"https:\\/\\/us.foursigmatic.c","source":"Product page","url":"https://us.foursigmatic.com/products/mushroom-chocolate"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"couldnt_verify","grok_said":"ships in 24 hours","store_says":null,"quote":null,"source":null,"url":"https://us.foursigmatic.com/pages/contact-us?hcUrl=%2Fen-US%2Farticles%2Fordering-shipping-10792"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-06T08:30:23.000Z","checkout_webmcp":null,"webmcp":false,"storefront_mcp":true,"catalog_tool":"search_catalog","catalog_found":true,"cart_link":true,"ucp_profile":"valid","summary":"Agents can reach checkout through Shopify's agent catalog. Browser cart shoppers get stuck at adding the product to the cart.","fix":null,"note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}},{"brand":"LMNT","slug":"lmnt","category":"supplements","category_label":"Supplements","homepage":"https://drinklmnt.com","product_url":"https://drinklmnt.com/products/lmnt-recharge-electrolyte-drink","product_name":"LMNT Recharge Electrolyte Drink","page":"https://www.arcreport.ai/agent-index/lmnt","badge":"https://www.arcreport.ai/agent-index/lmnt/badge","agents_can_buy":false,"buy":{"verdict":"No agent catalog found in this check. Browser cart shoppers get stuck at the door.","agents_can_buy":false,"agent_catalog":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","status":"none","answers_catalog":false,"catalog_found":null,"checkout_link":false,"blocked":false,"has_rails":false},"browser":{"simulated":true,"could_buy":0,"shoppers":5,"stopped_at":"the door"}},"verdict":"No agent catalog found in this check. Browser cart shoppers get stuck at the door.","could_buy":0,"shoppers":5,"score":13,"rank":10,"failure":"Store blocks automated agents at the door","tested_at":"2026-10-06T19:00:48.000Z","status":"scored","rivals_grok_named":["Liquid I.V.","Nuun","Ultima","Cure"],"grok_read":{"real":true,"status":"ready","would_recommend":true,"shock":"One AI model's read-back recommended this.","note":"Checked 8 Oct 2026. One AI model's read-back (currently Grok via API, not the consumer Grok app). One model, not a consensus.","checked_at":"2026-10-08T16:52:22.000Z"},"evidence":[{"fact":"price","label":"Price","status":"mismatch","grok_said":"$39 for 30 sticks","store_says":"$45","quote":"\"price\":45","source":"schema.org JSON-LD","url":"https://drinklmnt.com/products/lmnt-recharge-electrolyte-drink?variant=16358367199266"},{"fact":"returns_window","label":"Returns window","status":"grok_didnt_know","grok_said":null,"store_says":null,"quote":null,"source":null,"url":"https://drinklmnt.com/pages/refunds-returns"},{"fact":"shipping_cost","label":"Shipping cost","status":"match","grok_said":"free on US orders","store_says":"free","quote":"$ Deliver every 1 month 1 Add 1 Citrus Salt to cart No Questions Asked Refund Policy FREE Shipping On All US Orders What's inside?","source":"Product page","url":"https://drinklmnt.com/products/lmnt-recharge-electrolyte-drink?variant=16358367199266"},{"fact":"availability","label":"Availability","status":"couldnt_verify","grok_said":"in stock","store_says":"in stock in 12 of 15 sizes","quote":"\"availability\":\"https://schema.org/InStock\"","source":"schema.org JSON-LD","url":"https://drinklmnt.com/products/lmnt-recharge-electrolyte-drink?variant=16358367199266"},{"fact":"delivery_estimate","label":"Delivery estimate","status":"match","grok_said":"3-5 business days","store_says":"1–5 days","quote":"ive my LMNT order? Typically, we fulfill LMNT orders within 1-2 business days Standard domestic shipping is usually 3-5 business days unless otherw","source":"Product page","url":"https://drinklmnt.com/products/lmnt-recharge-electrolyte-drink?variant=16358367199266"}],"agent_rails":{"real":true,"affects_score":false,"checked_at":"2026-10-09T07:11:41.000Z","checkout_webmcp":{"status":"unavailable","detected":null,"tools":[],"reason":"no available variant"},"webmcp":false,"storefront_mcp":false,"catalog_tool":null,"catalog_found":null,"cart_link":false,"ucp_profile":"absent","summary":"No agent catalog found in this check. Browser cart shoppers get stuck at the door.","fix":"Expose a catalog agents can query over HTTP. On Shopify, enable search_catalog or search_shop_catalog at /api/ucp/mcp or /api/mcp and publish the /.well-known/ucp profile.","note":"Real HTTP check of the store's agent catalog, UCP, and storefront WebMCP adapter, plus Shopify-only Checkout WebMCP HTML detection when applicable (get/update/complete, buyer approval required). Not a browser session and not any third-party agent product. No model call or purchase. The full score comes from ARC browser shoppers A–E (real browser cart tests); this check does not change the score."}}]}