← The evidence ledger
Evidence row 76975
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://klima.halowerk.com/v1/material-co2
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- b13073b84575670c8384fc5232d127085cd9a45a33b114cfc5638fe93062e2ed
- Leaf
- 0x7ee84431ad29cdd56376092584c7d469feac768126d49398f05e169221f78ec0
What was observed
{
"endpoints": [
[
"x402",
"https://klima.halowerk.com/v1/material-co2"
]
],
"name": "klima.halowerk.com/v1/material-co2",
"owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
"raw": {
"accepts": [
{
"amount": "4000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"asset": "USDC",
"assetTransferMethod": "eip3009",
"eip712Domain": {
"chainId": 8453,
"name": "USD Coin",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"version": "2"
},
"name": "USD Coin",
"network_name": "Base Mainnet",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"scheme": "exact"
}
],
"description": "Calculates embodied emissions from mass and a published material factor. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"factor_kgco2e_per_kg": 2,
"lifecycle_boundary": "cradle-to-gate",
"mass_kg": 100,
"material": "steel",
"source": {
"published_at": "2026-06-10T00:00:00Z",
"title": "UK 2026 conversion factors",
"url": "https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2026"
}
},
"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": {
"factor_kgco2e_per_kg": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
},
"lifecycle_boundary": {
"description": "",
"maxLength": 512,
"minLength": 1,
"type": "string"
},
"mass_kg": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
},
"material": {
"description": "",
"maxLength": 512,
"minLength": 1,
"type": "string"
},
"source": {
"additionalProperties": false,
"properties": {
"published_at": {
"format": "date-time",
"type": "string"
},
"title": {
"description": "",
"maxLength": 300,
"minLength": 3,
"type": "string"
},
"url": {
"format": "uri",
"type": "string"
}
},
"required": [
"url",
"published_at",
"title"
],
"type": "object"
}
},
"required": [
"material",
"mass_kg",
"factor_kgco2e_per_kg",
"lifecycle_boundary",
"source"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-23T02:02:27.169Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-23T02:02:26.754Z"
},
"resource": "https://klima.halowerk.com/v1/material-co2",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Calculates embodied emissions from mass and a published material factor. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice."
}What the leaf hashes
{"body":"b13073b84575670c8384fc5232d127085cd9a45a33b114cfc5638fe93062e2ed","id":76975,"kind":"listing","method":"baseline/1","observed_us":1793025493195250,"prev":null,"subject":"x402_bazaar:https://klima.halowerk.com/v1/material-co2","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).
- 0x7ee807669318d0b31ab27ec89f7d07cbd71b5ed04e189beca9876397c9a744ed
- 0x625f455ae07bd14788c54aaebece39f16775e86c468fec72dd1e357838273455
- 0x97b36cf63447e69be517dd7a7878e8cbcb75233f4469cec09a4fdcfabbb05be5
- 0x4978e68f90bd073d872347278513e308a502e0842cf724f43ea7327a105333d1
- 0x2a9519b5b2827ab64e27d55091fff4f2e7a8cea404ce4d185126a3f0b26dad1a
- 0x03e51ee6d9e801dd1883a8a83d774fdd2a6f6bfb3f359cfa6ba3848f869080f4
- 0x8930fb3c13744984bbe0a2e864bcd770d797eb0a81fb6f647652443ec5f6137e
- 0x7212cf7b38d97d91a656abad162c61da0f00bea3ac8b4c97a64e322dc9e4a0ec
- 0x73fd4a237a0f3d67fd5a662dc540e200ad081e567f1d604d231e1404ae13d75e
- 0x75fb43d121b0c7d36d6ce3843de524bb5cde5e31bd50964f1eb46e9e4d22df1f
- 0x86993f34ffd04a19214c4b442a83218e78811798750015024990bf574868d9e8
- 0xab729e4203b650f2a3c15efd6fd44eb2482232373bc1de662fd9d496869eb2d3
- 0x0bffb634300aa5609bddaa79e8d31d7cde36c0a5a4465472f809b9f5287e40d2
- 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
- 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae