Evidence row 120409

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/math/stats"
    ]
  ],
  "name": "Saylor Innovations Dev Tools",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:devkit:math-stats",
          "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": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
          "memo": "saylor:devkit:math-stats",
          "reference": "5LCuVMxpgWKF29qSCoDvToRtMc3WmCMDZCrs5iDpPiP3",
          "session": "eyJhcnRpY2xlSWQiOiJkZXZraXQ6bWF0aC1zdGF0cyIsInJlZmVyZW5jZSI6IjVMQ3VWTXhwZ1dLRjI5cVNDb0R2VG9SdE1jM1dtQ01EWkNyczVpRHBQaVAzIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTIyNDExNzA4ODh9.qklVDtpVti36XVhG--K4xbE2wEDflpP7OoFYfOB4cAA"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Descriptive statistics for a list of numbers - mean, median, mode, standard deviation, quartiles and percentiles",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "values": "12,15,15,18,22,22,22,31,40,95"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "count": 10,
              "iqr": 13,
              "max": 95,
              "mean": 29.2,
              "median": 22,
              "method": "percentiles use linear interpolation between closest ranks; modes empty when every value is unique",
              "min": 12,
              "modes": [
                22
              ],
              "p90": 45.5,
              "p99": 90.05,
              "q1": 15.75,
              "q3": 28.75,
              "range": 83,
              "stdev_population": 23.3015020975,
              "stdev_sample": 24.5619398438,
              "sum": 292,
              "variance_population": 542.96,
              "variance_sample": 603.288888889
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "POST",
                    "PUT",
                    "PATCH",
                    "DELETE",
                    "HEAD"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "values": {
                      "description": "Comma-separated list of 1 to 1,000 finite numbers",
                      "examples": [
                        "12,15,15,18,22,22,22,31,40,95"
                      ],
                      "pattern": "^[-0-9.eE,;\\s]+$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "values"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "checked_at": {
                      "description": "Time the check was run (UTC)",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "count": {
                      "description": "How many values were analysed",
                      "type": "number"
                    },
                    "iqr": {
                      "description": "Interquartile range, q3 minus q1",
                      "type": "number"
                    },
                    "max": {
                      "description": "Largest value",
                      "type": "number"
                    },
                    "mean": {
                      "description": "Arithmetic mean",
                      "type": "number"
                    },
                    "median": {
                      "description": "Middle value (50th percentile)",
                      "type": "number"
                    },
                    "method": {
                      "description": "Method used",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "min": {
                      "description": "Smallest value",
                      "type": "number"
                    },
                    "modes": {
                      "description": "Most frequent values; empty when all are unique",
                      "items": {
                        "type": "number"
                      },
                      "type": "array"
                    },
                    "p90": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "p99": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "q1": {
                      "description": "First quartile (25th percentile)",
                      "type": "number"
                    },
                    "q3": {
                      "description": "Third quartile (75th percentile)",
                      "type": "number"
                    },
                    "range": {
                      "description": "Range covered by the data",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "stdev_population": {
                      "description": "Population standard deviation",
                      "type": "number"
                    },
                    "stdev_sample": {
                      "description": "Sample standard deviation, null for one value",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "sum": {
                      "description": "Sum of all values",
                      "type": "number"
                    },
                    "variance_population": {
                      "description": "Variance population",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "variance_sample": {
                      "description": "Variance sample",
                      "type": [
                        "number",
                        "null"
                      ]
                    }
                  },
                  "required": [
                    "count",
                    "mean",
                    "median"
                  ],
                  "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": "2026-10-17T12:44:10.924Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-17T12:44:10.746Z"
    },
    "resource": "https://saylorinnovations.com/api/math/stats",
    "serviceName": "Saylor Innovations Dev Tools",
    "tags": [
      "statistics",
      "mean median mode",
      "standard deviation",
      "percentiles",
      "data analysis"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Descriptive statistics for a list of numbers - mean, median, mode, standard deviation, quartiles and percentiles"
}

What the leaf hashes

{"body":"8dd3f01a553c5bf131c7c2f478b7954e5a8ca71147089c9b312897056cec749a","id":120409,"kind":"listing","method":"baseline/1","observed_us":1793025618021441,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/math/stats","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xb681e925726ee1a83d9db678109a9ec028d1847d30dfe2a9b9f40d11a0790bd4
2. 0xc673f463ce63cdbde330897097cc117e0ebe17a0c677ecfd3c20c6220985a6f3
3. 0xa9f09d382febe7744bdf0e5320047de5cee6cffc9d1dc2337ca75848b9a0d0cb
4. 0x9b7320933370430917b97cc33372e7c19166ff8cf06e4f42c53400022a61b822
5. 0x9efe78cdf007f288074628e1060f8391431fb112412ccb51ba92610420ba2512
6. 0x5b46bc7e519feee5d8f73bd37ad889634580aad54d23c1f07e1d145a9baaa350
7. 0x13be281c2883aa9a6e6508f3a8404ad54767b1c49ba187289b7e5b7f8f0256f3
8. 0x1b87fd515e343a5ff0fd1fe1dc078fbe0b4c23e8bf429df75492b7812db92b95
9. 0x0585de311ce0311439459893eedb4cc55ed3c848458b8746571e30f6aefef6be
10. 0x8ad504c3df28b2abf4893577952a0655be9d4e70ea34ee4e1147dc0aa281fdd2
11. 0xfa91c460bb9b05b6890b46e5326a89c9e487b6419bd4d84337c05040222a2e6c
12. 0x17930d484cab3f6850715eb0b77dd189c3c06f975cf9def12285fde3eb9b4234
13. 0x0d86419ca1dd0b62fd8b22ea2e8c74d441312cec3116a467bea429b43e026565
14. 0x083427e39db4dd470662401f6db5db8fadf084fc4274cf8621b368416952b78b
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae