Evidence row 116730

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://math.openverbs.com/v1/variables"
    ]
  ],
  "name": "List expression variables",
  "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": "Parse an expression and return the free variables it references, without evaluating it — so an agent can discover which inputs a formula needs before supplying values. A syntax error is a clean 400.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "expression": "example"
            },
            "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 to inspect.",
                      "maxLength": 1000,
                      "minLength": 1,
                      "type": "string"
                    }
                  },
                  "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": "2026-10-08T05:39:58.542Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-08T05:39:58.284Z"
    },
    "resource": "https://math.openverbs.com/v1/variables",
    "serviceName": "List expression variables",
    "tags": [
      "list formula variables",
      "extract expression variables",
      "parse variables in math",
      "formula input discovery",
      "expression variable lookup"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Parse an expression and return the free variables it references, without evaluating it — so an agent can discover which inputs a formula needs before supplying values. A syntax error is a clean 400."
}

What the leaf hashes

{"body":"633f954694efef6b94df46af93b4161505c44a55d4bfb189f51bdcbc7e723466","id":116730,"kind":"listing","method":"baseline/1","observed_us":1793025610214087,"prev":null,"subject":"x402_bazaar:https://math.openverbs.com/v1/variables","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. 0xd6c305a3d000beca10dac70e5711c338bcbc0d3c12f6929f1c3fe10124b61176
2. 0xd60e5ab08f716c4dd04431e2ffa00b2930fffaa1c8d91490301866a270393a3e
3. 0x5a8f10de9ec88adb27464b143e491ade9111e5a93df891bdb535c3bad5038f95
4. 0x76fc4d24e751e7a69d4aed77ed9972e972295089a0a361290781fdf185bfc184
5. 0xc16be8ed7f977648f1b17de5f78b9b51a45889f8e82519abc5b837842991fa9d
6. 0x48fbada434b84b52048d3ae291bdd6a7c5043bc802645270b75a56d35ebab392
7. 0xc763f93c4c158d067d26bd15e9c4ec80f2c789bf24f4ba52cb268d41a45220c0
8. 0xd5590d37492ac81c39ed3bd87c260bf7ee4ce3062d96c3d92067cffd6c64b691
9. 0xde37e1c61fb56d2fb64b312bc2dca9ef36f67f5d5bbeff3bcb10d2813b51bc09
10. 0xf226be7a40555e1c0639dcbf0c0dae400939299db6fb2a8e4eb2b5866510dc29
11. 0x993ee5fd278bf116928331fbf1ccabe7ebb40d4f5e12235f09eee4dcb29676aa
12. 0x39d84ffb833c94bfff15760ea7da987f5303e407884de386d5a33b2328c7d785
13. 0x3199db04c2c73c3483386a86bf503eafde5af103465608156e2e5f42e72a6fbe
14. 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
15. 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae