Evidence row 1784794

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://math.openverbs.com/v1/eval"
    ],
    [
      "x402",
      "https://math.openverbs.com/v1/variables"
    ]
  ],
  "name": "math.openverbs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "math.openverbs.com",
    "endpoints": [
      {
        "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.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "2*(3+4)",
            "group": "body",
            "name": "expression",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": 2,
            "group": "body",
            "name": "precision",
            "required": false,
            "type": "number"
          }
        ],
        "pricing": {
          "amount": "0.004",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "Evaluate expression",
        "tags": [
          "evaluate math expression",
          "calculator api",
          "compute formula",
          "expression evaluator",
          "math with variables"
        ],
        "url": "https://math.openverbs.com/v1/eval"
      },
      {
        "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.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "expression",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.004",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "List expression variables",
        "tags": [
          "list formula variables",
          "extract expression variables",
          "parse variables in math",
          "formula input discovery",
          "expression variable lookup"
        ],
        "url": "https://math.openverbs.com/v1/variables"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "math-openverbs-com",
    "integrationType": "",
    "isNew": false,
    "name": "math.openverbs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.004",
      "currency": "USDC",
      "maxAmount": "0.004",
      "minAmount": "0.004"
    },
    "provider": "math.openverbs.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": [
      "evaluate math expression",
      "calculator api",
      "compute formula",
      "expression evaluator",
      "math with variables",
      "list formula variables",
      "extract expression variables",
      "parse variables in math",
      "formula input discovery",
      "expression variable lookup"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"99dfbbe49fc85177286aaa4609bc5bca5c5ee7d464855cc9e6309d371232f531","id":1784794,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793557140279710,"prev":2828,"subject":"agentic_market:math-openverbs-com","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0xbc4a4e4d1fa799ec35869b8f5a4fabdeb2a4a3fbcaa1e236e7e359e3fdc0e9fc
2. 0x9527b6fb08157d85b1f0cd95cf62590df9e97afa8c59e64f2a1f3ed0135af670
3. 0xf7012ee35c6f964e46ba3c90fbb535edba953e6713c25575066be4a3ca3f2853
4. 0x9dd9e3792f57d039ff0edc17dc742bf1e54392fee1164e5766326e70693b24b7
5. 0xf4eeabf3c7f3af608b39033e5436032219942750965e5c0b0336ad4018346acf
6. 0x4945da1b6e3dc504adc7bdfd9ac4c6985a18837e4d4c1e76e59893a808508922
7. 0x7a29d05494a273051b85b147e42ae4ed3a2735a37b509484e5714bba68fbf682
8. 0xd2c984473c5619a63563d1b80b39eaf847141bb260d409be14ec2d4a151ce869
9. 0x3dad5f46598479c31a1daca6ad880e1d2f31329978a87d7cbecf5b552a9e254a
10. 0xf7235a5b9ffa945c2a3779fbb7b06aca5e99b7ac142ed0fe37505014f3996481
11. 0x9b42f9050876c6f5080592dc6b34fbd43d647b81b550d66fece6e4b381aaf1c6
12. 0x5efb472d2bf6c533a2a7a7c1d1f9c054c41b56a1f6de01ce97047453558bacb5
13. 0x440640affa0661e2887ea1fa1c7c460096d8203bbc33a7bb6164b10e738c37ab
14. 0x0c6f1e059ed2de7638825ab03396dd843c97d2de1abde6928871cfc5ef085a33
15. 0xf6217f3e2344dd9bf8c6e296c4729fbf7611d258b93c45e1bbe5f62e65e8e714
16. 0x8339aa87501c4d4f8b38a13e480a7c563957e09fb5711bed7cf189d6787f960d
17. 0xb5916fb7a3e87dc0702e46eeadcd22652e2e1e755f8d429cc7a14a67a350b51b
18. 0x6142ac48fda269c17791c79da99c2456ac6acfe98268f4d168a404fd6040c703
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90