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Evidence row 120361

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/kb/x402-paid-endpoint
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
a74693f7100040d76858b66fe32c957dad3b4b6721a9732fd6a6748fb68a5325
Leaf
0x3d4395a4ba1e5c9f3daf2adefafafea9d45da62a69c2b4b4cad7b4bc1241d607

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/x402-paid-endpoint"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:x402-paid-endpoint",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:x402-paid-endpoint",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:x402-paid-endpoint",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:x402-paid-endpoint",
          "reference": "muRXSMVAPWT6RKmr7ho7m2gK7Sif7pmsRGUFDRftz3i",
          "session": "eyJhcnRpY2xlSWQiOiJ4NDAyLXBhaWQtZW5kcG9pbnQiLCJyZWZlcmVuY2UiOiJtdVJYU01WQVBXVDZSS21yN2hvN20yZ0s3U2lmN3Btc1JHVUZEUmZ0ejNpIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI0NTY4OTEwMDl9.r0XngSfupj0t5-OxGkqT-u04jFGuJwx6qjsY5f_FjRo"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:x402-paid-endpoint",
          "reference": "26qD4DF6K48CXoUy6jzgiiZeGUAMTmWZuBRTEfP8wcJ2",
          "session": "eyJhcnRpY2xlSWQiOiJ4NDAyLXBhaWQtZW5kcG9pbnQiLCJyZWZlcmVuY2UiOiIyNnFENERGNks0OENYb1V5Nmp6Z2lpWmVHVUFNVG1XWnVCUlRFZlA4d2NKMiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNDU2ODkxMDA5fQ.4EkoSlF1Yj6cCiMlH1Rj293sfotRz5WZqcBdFebLK10"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "92680",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:x402-paid-endpoint",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "95547",
          "reference": "BQuuCt5gv4extbDbZMmhWNHm89u1Fu3RbhQ1aY2KZbv2",
          "session": "eyJhcnRpY2xlSWQiOiJ4NDAyLXBhaWQtZW5kcG9pbnQiLCJyZWZlcmVuY2UiOiJCUXV1Q3Q1Z3Y0ZXh0YkRiWk1taFdOSG04OXUxRnUzUmJoUTFhWTJLWmJ2MiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5MjY4MCwiZXhwIjoxNzkyNDU2ODkxMDA5fQ.GYzdjmc1xx51AdnqsgkNSQp33jDnbxI_mroUNkJiuSA",
          "solUsdPrice": 104.66
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Build an x402 paid endpoint - 402 challenge, verify and settle before fulfillment, idempotency and discovery",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "A build method for x402-payable endpoints: defining the paid unit and free preview, choosing scheme/network/asset/price, implementing the unpaid 402 challenge, verifying and settling before irreversible fulfillment, making retries idempotency-safe, publishing discovery metadata, and passing a full negative-test gate before mainnet. Includes a worked margin-negative pricing example.",
              "c": "AI & Agents",
              "id": "x402-paid-endpoint",
              "t": "x402 Paid Endpoint Builder"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "body": {
                      "description": "Main body text",
                      "type": "string"
                    },
                    "c": {
                      "description": "Category of the guide",
                      "type": "string"
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "license": {
                      "description": "License identifier",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "t": {
                      "description": "Title of the guide",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id",
                    "t",
                    "c",
                    "body"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790235422/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-20T00:39:31.052Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-20T00:39:30.708Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/x402-paid-endpoint",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "x402",
      "agent-payments",
      "api-monetization",
      "usdc",
      "discovery"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Build an x402 paid endpoint - 402 challenge, verify and settle before fulfillment, idempotency and discovery"
}

What the leaf hashes

{"body":"a74693f7100040d76858b66fe32c957dad3b4b6721a9732fd6a6748fb68a5325","id":120361,"kind":"listing","method":"baseline/1","observed_us":1793025617941979,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/x402-paid-endpoint","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).

  1. 0x3d4352252ffbba14290131b46b8c89897469866c8ca115fa82f180b55d6ec79d
  2. 0xc7f821267ecae946a88a89fc3068c0cf1d0885d68990ef8c85277766d1459cff
  3. 0x3c594a28fffe36e2ca3b5ee1b9617566e7a8c73eb5e781913d89525431686d29
  4. 0xf59ed95b033878d9153b5dab23d96c7d80a79e93c5d545b432ee675e170d5aeb
  5. 0x2d55269787abfc16ea6a73c0bc70a951ec20d966052590bdce19b7c73b648dea
  6. 0x702e43af66ecfc4dce2eeec5eb3d899a51158e00df3f4dd70f62ef408510aa8c
  7. 0x814955138e9d9d9b5824c96c2d920dc99862f7ceede0b5bc20f41c673bd51217
  8. 0x3a267d8797d327fc66f4c0727956b7e47caee018ed8bfd6ee688dd7341ad6191
  9. 0xa92d7be66dafa41de83cde2ea4513dcc1222c5a1b23abdfacb088c81170a5989
  10. 0x46e925b5e825b92710b39bef7e87d883d131661462048f287a27325752df91f3
  11. 0xc900cc76dc3702a3e60eaef3577f119464a6a90c3e2b646253f2ba09c089de97
  12. 0xd04df0f7f3be4d014b4cea8172ada286fbcf5bcb32ae1b281704fd75627b661b
  13. 0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
  14. 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
  15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
  16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
  17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
  18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON