{
  "version": "1.7.0",
  "title": "Source-backed profiles selected",
  "summary": "A small, dated editorial dataset for integration research. Use the JSON API to retrieve the same records.",
  "metrics": [
    {
      "label": "Profiles",
      "value": 5
    },
    {
      "label": "Checked at",
      "value": "2026-09-19"
    },
    {
      "label": "Freshness",
      "value": "Review overdue"
    }
  ],
  "tables": [
    {
      "title": "Official-source profiles",
      "columns": [
        "Profile",
        "Purpose",
        "Status",
        "Version",
        "Source"
      ],
      "rows": [
        [
          "x402 v2 exact EVM",
          "payment",
          "specification",
          "2",
          "https://github.com/coinbase/x402/blob/main/specs/x402-specification-v2.md"
        ],
        [
          "ERC-8004",
          "identity",
          "draft",
          "EIP-8004",
          "https://eips.ethereum.org/EIPS/eip-8004"
        ],
        [
          "ERC-20",
          "token",
          "standard",
          "EIP-20",
          "https://eips.ethereum.org/EIPS/eip-20"
        ],
        [
          "ERC-721",
          "token",
          "standard",
          "EIP-721",
          "https://eips.ethereum.org/EIPS/eip-721"
        ],
        [
          "ERC-1155",
          "token",
          "standard",
          "EIP-1155",
          "https://eips.ethereum.org/EIPS/eip-1155"
        ]
      ]
    }
  ],
  "notes": [
    "These are editorial summaries and review checklists, not exhaustive protocol schemas or conformance certificates. Read the linked specification before implementing.",
    "The dataset is a release snapshot. The API reports its original checkedAt and current age; it does not silently refresh the research date. Free access is available; no paid feed is on sale."
  ],
  "data": {
    "profiles": [
      {
        "id": "x402-v2-exact-evm",
        "name": "x402 v2 exact EVM",
        "purpose": "payment",
        "network": "eip155",
        "status": "specification",
        "version": "2",
        "source": "https://github.com/coinbase/x402/blob/main/specs/x402-specification-v2.md",
        "checkedAt": "2026-09-19",
        "claim": "Payment-required challenges describe acceptable payment options; verification and settlement are separate operations.",
        "fields": [
          "x402Version",
          "accepts"
        ],
        "boundary": "This record describes one EVM exact profile. It does not certify an endpoint, facilitator or settlement.",
        "tags": [
          "http",
          "payment-required"
        ]
      },
      {
        "id": "erc-8004",
        "name": "ERC-8004",
        "purpose": "identity",
        "network": "eip155",
        "status": "draft",
        "version": "EIP-8004",
        "source": "https://eips.ethereum.org/EIPS/eip-8004",
        "checkedAt": "2026-09-19",
        "claim": "Agent identity, reputation and validation registries expose signals; unfiltered feedback can be vulnerable to Sybil or spam.",
        "fields": [
          "identity",
          "reputation",
          "validation"
        ],
        "boundary": "Registration does not guarantee advertised capabilities are functional or non-malicious.",
        "tags": [
          "agent",
          "reputation"
        ]
      },
      {
        "id": "erc-20",
        "name": "ERC-20",
        "purpose": "token",
        "network": "eip155",
        "status": "standard",
        "version": "EIP-20",
        "source": "https://eips.ethereum.org/EIPS/eip-20",
        "checkedAt": "2026-09-19",
        "claim": "Fungible token interface includes transfers, allowances and approvals.",
        "fields": [
          "transfer",
          "approve",
          "allowance"
        ],
        "boundary": "Method selectors alone do not establish implementation behavior or token decimals.",
        "tags": [
          "fungible",
          "allowance"
        ]
      },
      {
        "id": "erc-721",
        "name": "ERC-721",
        "purpose": "token",
        "network": "eip155",
        "status": "standard",
        "version": "EIP-721",
        "source": "https://eips.ethereum.org/EIPS/eip-721",
        "checkedAt": "2026-09-19",
        "claim": "Nonfungible token interface includes ownership, transfer and operator approval methods.",
        "fields": [
          "ownerOf",
          "safeTransferFrom",
          "setApprovalForAll"
        ],
        "boundary": "Operator approval can cover the collection. This record does not identify a safe operator.",
        "tags": [
          "nft",
          "operator"
        ]
      },
      {
        "id": "erc-1155",
        "name": "ERC-1155",
        "purpose": "token",
        "network": "eip155",
        "status": "standard",
        "version": "EIP-1155",
        "source": "https://eips.ethereum.org/EIPS/eip-1155",
        "checkedAt": "2026-09-19",
        "claim": "Multi-token interface includes batch transfers and operator approvals.",
        "fields": [
          "balanceOfBatch",
          "safeBatchTransferFrom",
          "setApprovalForAll"
        ],
        "boundary": "A common interface does not make balances, asset rights or transfer behavior trustworthy.",
        "tags": [
          "multi-token",
          "batch"
        ]
      }
    ],
    "checkedAt": "2026-09-19",
    "ageDays": 43,
    "stale": true
  }
}