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Evidence row 236275

Observed , by sync.agentic_market/1.

Kind
listing
About
source_record agentic_market:checksum-openverbs-com
Recorded
Previous row
#53851
Body SHA-256
236fe286b742400a85a264a02771af72957004dfeaa5cc739b8b395226393778
Leaf
0xffa2662ae92b1d9907fd60ec87b2653d33adb54eca959d6aa0b7699af4d35576

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://checksum.openverbs.com/v1/adler32"
    ],
    [
      "x402",
      "https://checksum.openverbs.com/v1/crc16"
    ],
    [
      "x402",
      "https://checksum.openverbs.com/v1/crc32"
    ],
    [
      "x402",
      "https://checksum.openverbs.com/v1/fletcher"
    ]
  ],
  "name": "checksum.openverbs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "checksum.openverbs.com",
    "endpoints": [
      {
        "description": "Adler-32 checksum (as used by zlib) over the input payload. Faster than CRC-32 but weaker for short inputs. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "Adler-32",
        "tags": [
          "adler32 checksum",
          "calculate adler32",
          "zlib checksum",
          "adler32 api",
          "fast data checksum"
        ],
        "url": "https://checksum.openverbs.com/v1/adler32"
      },
      {
        "description": "CRC-16 over the input payload in one of several standard variants (ccitt-false, xmodem, modbus, ibm; default ccitt-false). Returns the checksum as an unsigned integer and 4-digit hex. Non-cryptographic.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "ccitt-false",
            "group": "body",
            "name": "variant",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "CRC-16 (multiple variants)",
        "tags": [
          "crc16 checksum",
          "calculate crc16",
          "crc16 variants",
          "ccitt crc lookup",
          "modbus crc"
        ],
        "url": "https://checksum.openverbs.com/v1/crc16"
      },
      {
        "description": "CRC-32 (IEEE 802.3 polynomial, as used by zip, gzip and PNG) over the input payload. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic — for error detection only.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "CRC-32 (IEEE)",
        "tags": [
          "crc32 checksum",
          "calculate crc32",
          "crc32 api",
          "zip checksum",
          "gzip checksum"
        ],
        "url": "https://checksum.openverbs.com/v1/crc32"
      },
      {
        "description": "Fletcher checksum over the input payload, in 16-bit (default) or 32-bit width. Returns the checksum as an unsigned integer and hex. Non-cryptographic.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": 16,
            "group": "body",
            "name": "bits",
            "required": false,
            "type": "number"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "Fletcher-16 / Fletcher-32",
        "tags": [
          "fletcher checksum",
          "fletcher16 checksum",
          "fletcher32 checksum",
          "calculate fletcher",
          "fletcher api"
        ],
        "url": "https://checksum.openverbs.com/v1/fletcher"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "checksum-openverbs-com",
    "integrationType": "",
    "isNew": false,
    "name": "checksum.openverbs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.002",
      "currency": "USDC",
      "maxAmount": "0.002",
      "minAmount": "0.002"
    },
    "provider": "checksum.openverbs.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": [
      "adler32 checksum",
      "calculate adler32",
      "zlib checksum",
      "adler32 api",
      "fast data checksum",
      "crc16 checksum",
      "calculate crc16",
      "crc16 variants",
      "ccitt crc lookup",
      "modbus crc",
      "crc32 checksum",
      "calculate crc32",
      "crc32 api",
      "zip checksum",
      "gzip checksum",
      "fletcher checksum",
      "fletcher16 checksum",
      "fletcher32 checksum",
      "calculate fletcher",
      "fletcher api"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"236fe286b742400a85a264a02771af72957004dfeaa5cc739b8b395226393778","id":236275,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793028761090581,"prev":53851,"subject":"agentic_market:checksum-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 (296695 rows).

  1. 0xffa256cdbb5680836baeb299342bd97e63e74aec804277dbcdd1706e60b5aa76
  2. 0x790f9af8fbd54e62f66d97e04d5d9ad6de48bcb0da484529c99ead282c27dfd8
  3. 0xe3da6e3e8db3223f61261b9b13de4a288bb4bf2b76715be51de0fc53012ff70e
  4. 0xcbec8ba07a4ff737c7cff74252bf6acdf4b2bbad41c4bf102547823269cc51a5
  5. 0x91b3a7c0944582303d72ef7d937df346c100a9967aae05536c34fc722027e917
  6. 0x2caba646c9f0353c72546e9e2036c334fdf81d125db902062caaadbe9b2a5a45
  7. 0x24b86db97ead756093c8b84fcbd3baa9e71c4469cfdaf9a4ce92b45f0b45424b
  8. 0x5b0c059b72c53c92c059df5184e610ab84b03d4d2004347cd079e651eb2d0805
  9. 0x72743ee780f422be29752f40068ca0876fda4de868f24662bd7406d05ac0b33b
  10. 0xa29eae943754390bcd078416f8d4db8f78b3a74b270a306deb84f755b7cf17d8
  11. 0xd3a4547616d40f6cf22a3f69647bc5fe7630b638881a5ae1ce088b336fd0e181
  12. 0xbd264414f726ecec85a6b231446a7d5db56b5a61f8c3f471b7913d982daa291d
  13. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON