Evidence row 116729

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://math.openverbs.com/v1/eval"
    ]
  ],
  "name": "Evaluate expression",
  "owner_address": "0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
        "scheme": "exact"
      }
    ],
    "description": "Evaluate a mathematical expression with optional named variables — arithmetic, comparison and logic operators plus functions like sqrt, abs, min, max, sin, cos, log, floor, round, etc. A syntax error, an undefined variable, or a non-finite result is a clean 400. The factorial operator is disabled for safety.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "expression": "2*(3+4)",
              "precision": 2
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "expression": {
                      "description": "The expression, e.g. \"sqrt(x^2 + y^2)\".",
                      "maxLength": 1000,
                      "minLength": 1,
                      "type": "string"
                    },
                    "precision": {
                      "description": "Round a numeric result to this many decimal places.",
                      "maximum": 15,
                      "minimum": 0,
                      "type": "integer"
                    },
                    "variables": {
                      "additionalProperties": {
                        "type": [
                          "number",
                          "boolean",
                          "string"
                        ]
                      },
                      "description": "Named variable values referenced by the expression.",
                      "type": "object"
                    }
                  },
                  "required": [
                    "expression"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-08T05:39:58.406Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-08T05:39:58.133Z"
    },
    "resource": "https://math.openverbs.com/v1/eval",
    "serviceName": "Evaluate expression",
    "tags": [
      "evaluate math expression",
      "calculator api",
      "compute formula",
      "expression evaluator",
      "math with variables"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Evaluate a mathematical expression with optional named variables — arithmetic, comparison and logic operators plus functions like sqrt, abs, min, max, sin, cos, log, floor, round, etc. A syntax error, an undefined variable, or a non-finite result is a clean 400. The factorial operator is disabled for safety."
}

What the leaf hashes

{"body":"a4b9816a6e8bc65165135f1d48e6249223cc76f2330d19248c6d5f5d2d2e2491","id":116729,"kind":"listing","method":"baseline/1","observed_us":1793025610213130,"prev":null,"subject":"x402_bazaar:https://math.openverbs.com/v1/eval","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. 0x776f09cb0a7524bfd57c6473756562da33185d96e3cbcf90e3a88d726b2cb707
2. 0x17545785632588d9dc342ca947030204dce1640607d1dcae94bd429a95e9b2c5
3. 0xe4dfc5c5718ff90c74036ec2b73af95aa7dd9c9d099201ae6c55b508b8cf9eed
4. 0xf8b4d5db0983a6c04657d67588f1c8e649157b9b387abef08a67db780d1b5023
5. 0xf0e63ece9c1c12e074fdf2120da81fe1063b80e6c5d0889bbb732bcb15875415
6. 0x162aa9fac106bb5c1aec74094ac5315b82803b321f72368a8a356a88a2364c93
7. 0x43aed3ed935da8a523c59b80b0311a3371e31634db5f419d21f7c8094bc11f60
8. 0xaa2b2fa35413fc6c86e4b9fa3e37e95bfaaca625699dd7ac55500ee74d5559ef
9. 0x84576b0f9383e071639029ea42925f783347128977635df38e28a09f4ebb82ba
10. 0x316f4d1421d8a02c25f79a2e478b334ffb40a5f5da7cc727bc9c52cd14056752
11. 0x8fe7ebf89d10ac2e699de3f80f5dda3e72eef4ae079794ab7d1035929ad723cc
12. 0x8fdfac9874f184de58b63efbdab0fc27674958d741146d02f58b04d3c559cabf
13. 0xdef3cab0b4070d8ad7f4f91288da4881d19789f131b1b353621df79df04a0617
14. 0xc4fe2177880ea1b0e82b6fe4c270090fd0fbe5af3a42a8cbf6a6ba2fa35625f6
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae