Evidence row 4067

Observed 26 Oct 2026, 14:34 UTC, by baseline/1.

Kind: listing
About: source_record agentic_market:unit-openverbs-com
Recorded: 26 Oct 2026, 14:34 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: b58d4c28707eda293c8ae74bde151cb836167f45776a0cd8ca32693d5e6bed9f
Leaf: 0xb5ce87de706997df620140991eccc94d8281277f987c471894ccacaec2b33690

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://unit.openverbs.com/v1/convert"
    ],
    [
      "x402",
      "https://unit.openverbs.com/v1/list"
    ]
  ],
  "name": "unit.openverbs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "unit.openverbs.com",
    "endpoints": [
      {
        "description": "Convert a value between units — length, mass, volume, temperature, area, speed, pressure, energy, power, digital storage, time, angle, frequency and more. Unknown units or a conversion between incompatible measures (e.g. kg → km) are rejected as a clean 400.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "km",
            "group": "body",
            "name": "from",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "mi",
            "group": "body",
            "name": "to",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": 5,
            "group": "body",
            "name": "value",
            "required": false,
            "type": "number"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "Convert units",
        "tags": [
          "convert units",
          "unit conversion api",
          "kilometers to miles",
          "celsius to fahrenheit",
          "kg to pounds"
        ],
        "url": "https://unit.openverbs.com/v1/convert"
      },
      {
        "description": "List the supported units and their metadata (abbreviation, measure, system, singular/plural names), optionally filtered to a single measure — a discovery endpoint for choosing valid `from`/`to` values.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "length",
            "group": "body",
            "name": "measure",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "3"
        },
        "serviceName": "List units",
        "tags": [
          "list supported units",
          "unit metadata lookup",
          "valid unit abbreviations",
          "measurement units api",
          "discover conversion units"
        ],
        "url": "https://unit.openverbs.com/v1/list"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "unit-openverbs-com",
    "integrationType": "",
    "isNew": false,
    "name": "unit.openverbs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.002",
      "currency": "USDC",
      "maxAmount": "0.002",
      "minAmount": "0.002"
    },
    "provider": "unit.openverbs.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": [
      "convert units",
      "unit conversion api",
      "kilometers to miles",
      "celsius to fahrenheit",
      "kg to pounds",
      "list supported units",
      "unit metadata lookup",
      "valid unit abbreviations",
      "measurement units api",
      "discover conversion units"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"b58d4c28707eda293c8ae74bde151cb836167f45776a0cd8ca32693d5e6bed9f","id":4067,"kind":"listing","method":"baseline/1","observed_us":1793025276762138,"prev":null,"subject":"agentic_market:unit-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 2026-10-26 (296695 rows).
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Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON