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Evidence row 119533

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/chess/eval
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
64d847a4174a36194f945362a0fb110323d1c292c8df6ce71f24ace19b24bcdd
Leaf
0x89225035b8e6c34c4c24b06f68697211e067b4d805e10fd2cd5d9cccd01f149a

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/chess/eval"
    ]
  ],
  "name": "Saylor Innovations Chess",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:chess:eval",
          "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:chess:eval",
          "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:chess:eval",
          "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": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "memo": "saylor:chess:eval",
          "reference": "7AniUD2Ho5oPGZ48fwPVRG7sdBNtuBBCzcwAQADri8NF",
          "session": "eyJhcnRpY2xlSWQiOiJjaGVzczpldmFsIiwicmVmZXJlbmNlIjoiN0FuaVVEMkhvNW9QR1o0OGZ3UFZSRzdzZEJOdHVCQkN6Y3dBUUFEcmk4TkYiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjQ4MDQxNjA3N30.77P35C5O-iUhOeBx981cDxU5syf_ZKmQLTx-J3an46k"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "memo": "saylor:chess:eval",
          "reference": "GDSviiioyfoggRkZwb5EbjxPcxnPPn2SnkHSZhkWDFdC",
          "session": "eyJhcnRpY2xlSWQiOiJjaGVzczpldmFsIiwicmVmZXJlbmNlIjoiR0RTdmlpaW95Zm9nZ1JrWndiNUVianhQY3huUFBuMlNua0hTWmhrV0RGZEMiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjQ4MDQxNjA3OH0.BWKv9bezc7jxuTUp4IMSSSCZJxIW3qXlodpWzSngFL0"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "92742",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:chess:eval",
          "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": "95611",
          "reference": "7ZzgJsk5aDiPoqJAtHb7g8x3kDmWzVHcV1N9dtto2WVT",
          "session": "eyJhcnRpY2xlSWQiOiJjaGVzczpldmFsIiwicmVmZXJlbmNlIjoiN1p6Z0pzazVhRGlQb3FKQXRIYjdnOHgza0RtV3pWSGNWMU45ZHR0bzJXVlQiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTI3NDIsImV4cCI6MTc5MjQ4MDQxNjA3OH0.ZSkEUkkwTkM4-I6lNI6aXH1Sphv0OR1vV8EOYlzWxxM",
          "solUsdPrice": 104.59
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Chess position evaluation from Stockfish (Lichess cloud) - best lines, evaluation and mate-in-N",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "fen": "rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "depth": 70,
              "found": true,
              "lines": [
                {
                  "eval_pawns": 0.18,
                  "moves_uci": [
                    "e7e5",
                    "g1f3"
                  ],
                  "verdict": "roughly equal"
                }
              ],
              "side_to_move": "black"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "fen": {
                      "description": "position in FEN (query)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "fen"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "depth": {
                      "type": "number"
                    },
                    "engine": {
                      "description": "Engine or model that produced the result",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "fen": {
                      "description": "Board position in FEN notation",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "found": {
                      "description": "True when the lookup matched a record",
                      "type": "boolean"
                    },
                    "knodes": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "lines": {
                      "description": "Transit lines",
                      "items": {
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "note": {
                      "description": "Caveat or context for reading the result",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "side_to_move": {
                      "description": "Side to move",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "source": {
                      "description": "Data source the values come from",
                      "type": [
                        "string",
                        "null"
                      ]
                    }
                  },
                  "required": [
                    "found"
                  ],
                  "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": "2026-10-20T07:11:36.123Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-20T07:11:35.936Z"
    },
    "resource": "https://saylorinnovations.com/api/chess/eval",
    "serviceName": "Saylor Innovations Chess",
    "tags": [
      "chess",
      "eval",
      "lichess",
      "stockfish"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Chess position evaluation from Stockfish (Lichess cloud) - best lines, evaluation and mate-in-N"
}

What the leaf hashes

{"body":"64d847a4174a36194f945362a0fb110323d1c292c8df6ce71f24ace19b24bcdd","id":119533,"kind":"listing","method":"baseline/1","observed_us":1793025615779966,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/chess/eval","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. 0x89224e7103fb5f7d23bd62856a21da32357d4dd54f5aac682d01941e1692572a
  2. 0x4f2477e1e7bd2c47417501430151b0e40bc88492658fa8fb03aab96e934a129c
  3. 0x1fad09c427e67e9666a3c549aaf33d9c7d773ff4aac1bb8594ff495e1ab96a42
  4. 0x3cf6964c44b3718e0119cf4cd1cd6d0e9798c67ff993cb88e5f78f076291c143
  5. 0x52e58fbe9e9f4c414698e4e4ab989e5b77345859bab41fbad6e7b66cab075b5d
  6. 0x2d39fdb3238edf49e76d8115d28f3bd385deed1cd93de0f305a95e8e98c6999a
  7. 0x35fce9bd34523cef37cefd49bf35a35611f346869eddaac20e08a94bb24de1ae
  8. 0x06bf5c8d1f429e7f7802d69f068a8e5a30602d676a3d96531603614fed09c365
  9. 0x00e68f9c46b0f141c7ad95897ef8972e0da00f0b638ec98c8542cf0bb4478e6a
  10. 0xed8c683cc2523b6faaf9567b2bca065f0b0b5a96cb16dc02a32ff230916396f8
  11. 0xfb2bf7248df06c668bce5c2fce26586eb8982728138c40f164c1666cb3e32d7b
  12. 0x7bf2d426bb827b94d7608055662cf2e3f09791e1a4c2c6bd606c0a9e89b18e59
  13. 0x49d11be052a4c069b10250aaba214f566b3f2e5aaa7a98e82ccc6a71c0e801a0
  14. 0x78ac2b34737774659a6a411f4d10b8ba570d40699d9f277321c3a32ff03d1dc9
  15. 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
  16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
  17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON