{
      "tool_id": "art-19-agentic-checkout-protocol-selector",
      "tool_version": "1.0.0",
      "display_name": "Agentic Checkout Protocol Selector",
      "mcp_name": "select_agentic_checkout_protocol",
      "mandate_type": "routing_policy",
      "wave": "A",
      "gpu": false,
      "url": "https://ainumbers.co/chaingraph/art-19-agentic-checkout-protocol-selector.html",
      "description": "Scores ACP, UCP, x402, and Visa TAP against platform profile (buyer type, AOV, geography, stack capabilities) and returns a ranked protocol recommendation with fit scores. Node 1 of 3 in the Agentic Checkout Chain.",
      "input_schema_ref": "chaingraph/art-19-agentic-checkout-protocol-selector.html#manifest",
      "deadline": null,
      "deadline_note": "ACP live; UCP launched Jan 2026; x402 live on Coinbase CDP; TAP from Visa",
      "consumes": [],
      "feeds": [
        "art-20-acp-ucp-product-feed-conformance-auditor",
        "ptg-01-ap2-prompt-template-generator"
      ],
      "status": "live",
      "conformance_fixtures": false,
      "compute_capability": "server",
      "compute_images": [{"system":"sha256-source","image_id":"sha256:4219bb286318e4b2c15e45b65ee7be8d960c49a3f2a805aee2e9b9d49ff797e0","valid_from":"2026-07-10"},{"system":"risc0","image_id":"sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6","valid_from":"2026-06-28"}],
      "compute_proof": {
        "type": "ZkVmReceipt",
        "system": "risc0",
        "receiptFormat": "groth16-bn254",
        "imageId": "sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6",
        "seal": "ImztYHEJbMAolSYzuDtz0KIX4gRsCsVX+AnATWBTn/sHzY+/LtKmrh3yNO2+Z4DYw9WddclJ6O5CcQJWjUUIxSbocrgPqD8ntLzqzI+4DnWuH3bb/xkbMcapOPCZIl6/JKpNMOrLRzC4mVohY8JTFv8pEUSt5mkFRCoGzxEnxgAoOLxFWguFnvqX2FAe+Wuc66kFzuTa1ErpIQC2mU8FuhS3ysz/w0C95YBmAuKsoeYgMUh/3/3u2NxxmQn1FlgjJTPnuKQjfyBcj+GbVZ4GBw5loT0RHfIvlvfggzHdnbAX8YYYcUGETHu3BM8VWaf1GYUUOxth92FFvCPVCGplOw==",
        "journal": {
          "chaingraph_version": "0.4.0",
          "kernel_digest": "sha256:1ba2b3b6a19f46bbc1dbdaa6e39430e5d4fd296d843d4398aa82bd17d248d501",
          "output": {
            "primary_name": "ACP (Agent Commerce Protocol / AP2)",
            "primary_recommendation": "ACP",
            "primary_score": 100,
            "profile": {
              "agent_appetite": "high",
              "aov": "mid",
              "buyer_type": "agent",
              "geo": "global",
              "platform": "custom",
              "stack_card": false,
              "stack_crypto": false,
              "tech_cap": "api"
            },
            "protocol_scores": [
              {
                "bestFor": "AI-native merchants, ChatGPT / Gemini checkout integration, structured mandate flows",
                "label": "recommended",
                "name": "ACP (Agent Commerce Protocol / AP2)",
                "notFor": "Merchants with no AI agent traffic or no API integration capability",
                "protocol": "ACP",
                "score": 100
              },
              {
                "bestFor": "Platform merchants, broad agent interop, standardized checkout across agent surfaces",
                "label": "recommended",
                "name": "UCP (Universal Checkout Protocol)",
                "notFor": "Micropayments < $1, custom API-only merchants needing sub-cent settlement",
                "protocol": "UCP",
                "score": 95
              },
              {
                "bestFor": "API/content micropayments, per-call AI agent billing, developer tools, sub-$10 transactions",
                "label": "viable",
                "name": "x402 (HTTP 402 Micropayment Protocol)",
                "notFor": "Consumer checkout flows, merchants needing fiat settlement, high-AOV merchandise",
                "protocol": "x402",
                "score": 55
              },
              {
                "bestFor": "Card-first merchants, backward compat with existing Visa acquiring, high-value B2C/B2B",
                "label": "viable",
                "name": "Visa TAP / VIC (Trusted Agent Protocol)",
                "notFor": "Crypto-native merchants, micropayments, merchants without Visa acquiring",
                "protocol": "TAP",
                "score": 55
              }
            ],
            "recommended_protocols": [
              "ACP",
              "UCP"
            ],
            "viable_protocols": [
              "ACP",
              "UCP",
              "x402",
              "TAP"
            ]
          }
        }
      },
      "export_capability": [
        "xlsx",
        "csv",
        "pdf",
        "xbrl:ocg-ext"
      ]
    }