{"ok":true,"service":"ARC","north_star":"The open benchmark of whether AI agents can reach checkout, for every store, agent and protocol.","endpoint":"https://www.arcreport.ai/api/ask","mcp_tool":"ask_arc","directory":{"tool":"find_agent_ready_stores","endpoint":"https://www.arcreport.ai/api/agent-checkout/stores","authentication":"none"},"ucp_validator":{"tool":"validate_ucp_profile","endpoint":"https://www.arcreport.ai/api/ucp/validate?url=","authentication":"none","page":"https://www.arcreport.ai/developers/ucp-validator"},"product_data":{"tool":"product_data_check","endpoint":"https://www.arcreport.ai/api/agent-checkout/product-data?host=","authentication":"none"},"adoption":{"tool":"agent_commerce_adoption","endpoint":"https://www.arcreport.ai/api/agent-checkout/adoption","authentication":"none","hub":"https://www.arcreport.ai/agent-checkout/adoption"},"instant_checkout":{"endpoint":"https://www.arcreport.ai/api/agent-checkout?url=","mcp":"https://www.arcreport.ai/api/ask","tool":"can_agent_checkout","authentication":"none","cache_hours":24},"agent_facts":{"tools":["get_agent_facts","list_category_agent_facts"],"endpoint":"https://www.arcreport.ai/api/agent-facts","authentication":"none","hub":"https://www.arcreport.ai/agent-facts"},"read_without_login":true,"does_not_start_a_scan":true,"params":["url","brand","category","q"],"example":"https://www.arcreport.ai/api/ask?q=running+shoes","docs":"https://www.arcreport.ai/for-agents","openapi":"https://www.arcreport.ai/openapi.json","mcp_discovery":"https://www.arcreport.ai/.well-known/mcp.json","honesty":{"cart_attempts":"browser","grok_fact_check":"Real Grok model via API, not the consumer Grok app. Rivals only when that read exists.","agent_rails":"Live HTTP check of Shopify's agent catalog API, UCP profile, and WebMCP storefront adapter, when a row is stored. Not a real Muse, Instinct, Grok Bot, OpenAI dots, or OpenClaw run. Does not change the score. Read buy.agent_catalog and buy.browser together. Null until a catalog check has run."}}