← The evidence ledger
Evidence row 126086
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://x402.forgemesh.io/gas-mileage-lookup
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 4320613d661b398137bb8a1e2a09834cd975ae90fe3dbb2ccaa3781ce382ccf2
- Leaf
- 0xd0703ab38b9018ca9734f704fc070e1de8e6bd36bfea91d9eccdbed2b2df0e3b
What was observed
{
"endpoints": [
[
"x402",
"https://x402.forgemesh.io/gas-mileage-lookup"
]
],
"name": "x402.forgemesh.io/gas-mileage-lookup",
"owner_address": "0x850363a27f0ac6feb9c7a3ec4c1d295262df9432",
"raw": {
"accepts": [
{
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x850363a27F0aC6fEb9C7a3eC4C1d295262dF9432",
"scheme": "exact"
}
],
"description": "Gas mileage checker: authoritative city/highway/combined MPG for any US light-duty vehicle model year 1984 or newer, with fuel type, greenhouse-gas score, and estimated annual fuel spend. VIN input is decoded automatically; fuzzy model matching bridges naming differences. For automotive and budgeting agents.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"make": "Honda",
"model": "Accord",
"model_year": "2020"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"attribution": "US DOE/EPA fuel economy database (public domain)",
"fuel_economy": {
"annual_fuel_cost_usd": 1600,
"city_mpg": 26,
"co2_tailpipe_g_per_mi": 302,
"combined_mpg": 29,
"fuel_type": "Regular",
"highway_mpg": 35
},
"matched_variant": {
"description": "2020 Honda Accord — Man 6-spd 1.5L",
"vehicle_id": 42069
},
"offers": {
"disclosure": "Affiliate links: they fund the free data; the price is the same for you.",
"history_reports": [
{
"adds": "title brands, accidents, odometer readings, prior sales",
"label": "EpicVIN vehicle history report",
"partner": "epicvin",
"pricing": "per report",
"url": "https://forgemesh.io/go/epicvin"
},
{
"adds": "title brands, accident and damage records, odometer readings, prior sales",
"label": "Detailed Vehicle History report (10% off)",
"partner": "dvh",
"pricing": "per report, coupon applied",
"url": "https://forgemesh.io/go/dvh"
}
],
"note": "Our data above is free public NHTSA/EPA data for the model year. Whether THIS VIN was wrecked, flooded, rolled back or branded salvage lives in licensed title databases; these partners sell that per VIN."
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"make": {
"description": "e.g. Honda",
"type": "string"
},
"model": {
"description": "e.g. Accord",
"type": "string"
},
"model_year": {
"description": "4-digit year, 1984+",
"type": "string"
},
"vehicle_id": {
"description": "exact variant id from other_variants",
"type": "integer"
},
"vin": {
"description": "VIN — decoded automatically (alternative to make/model/model_year)",
"type": "string"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"info": {
"required": false
},
"offer-receipt": {
"info": {
"offers": [
{
"acceptIndex": 0,
"format": "eip712",
"payload": {
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"payTo": "0x850363a27F0aC6fEb9C7a3eC4C1d295262dF9432",
"resourceUrl": "https://x402.forgemesh.io/gas-mileage-lookup",
"scheme": "exact",
"validUntil": 1791440102,
"version": 1
},
"signature": "0x88abd81d39e884d8b23ea2c0cb7e61d8cbd9e3e2b48a3513f2e5d139e66f006526fd7b8ad005d586ac649769ab6fc7c16c8c1703290bca2c43ae01a33cfef1fa1c"
}
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"offers": {
"items": {
"properties": {
"acceptIndex": {
"type": "integer"
},
"format": {
"type": "string"
},
"payload": {
"properties": {
"amount": {
"type": "string"
},
"asset": {
"type": "string"
},
"network": {
"type": "string"
},
"payTo": {
"type": "string"
},
"resourceUrl": {
"type": "string"
},
"scheme": {
"type": "string"
},
"validUntil": {
"type": "integer"
},
"version": {
"type": "integer"
}
},
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"type": "object"
},
"signature": {
"type": "string"
}
},
"required": [
"format",
"signature"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"offers"
],
"type": "object"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
},
"lastUpdated": "2026-10-08T06:10:02.065Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-08T06:10:01.955Z"
},
"resource": "https://x402.forgemesh.io/gas-mileage-lookup",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Gas mileage checker: authoritative city/highway/combined MPG for any US light-duty vehicle model year 1984 or newer, with fuel type, greenhouse-gas score, and estimated annual fuel spend. VIN input is decoded automatically; fuzzy model matching bridges naming differences. For automotive and budgeting agents."
}What the leaf hashes
{"body":"4320613d661b398137bb8a1e2a09834cd975ae90fe3dbb2ccaa3781ce382ccf2","id":126086,"kind":"listing","method":"baseline/1","observed_us":1793025627206487,"prev":null,"subject":"x402_bazaar:https://x402.forgemesh.io/gas-mileage-lookup","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).
- 0xd0704263f81cb66ed0e5fac9fa5e15f3356f49378f85dbfc3d13ec5bbb3fcf28
- 0x7bf61f9c440a03b29a773d28935c826245100ad775ed4c2cca50d19269d8dfdb
- 0x05ca88e7b481b3eaeb2b24b359f9acf69c4fc0cc46158b46482289d750fe56c6
- 0x781d216ad267fea923fa6dcceaec75a3d5b63e3ff3a0e53c32adbb3bf316daf9
- 0xc377b486ec45a0e0c99aee040b65fc28b72ea9a8b31ac83279e0ea963be9c913
- 0xefcc3610967691851fbf3bf004398603537c290d199579de1cca9c4161e9dc20
- 0x8718990d8f7c7a229d9067bf828d23eec0b9b90d18609d7ef726f324c1a8953f
- 0x219101691e75e2f753c4aa87b4e43d07a905e0b42bc8c4d9487f5be81b7d59c3
- 0xeaccd7df216687be1d30e02f09e186deace20c059309420f3ec59d08d3a4e608
- 0x0b6cb706c8b3f325ee28e22acdd9550d5608845cb77ee7fa124320b9a4aad34d
- 0x026c75973d292b16fc9c1aefff047e2e4656075d16803275f6ae428cf2826ee1
- 0x3f401930661bff9a668037b662b5b8766fa60035f100a3e9fc585c576d892ffa
- 0xe43762a621da83c0b4b63f549cd2e19c428ac702bfc1038d70233867b06c447f
- 0xefabf1105e09cf52c12c58e60cbb5048b9ac3f02631d1816a926e14bdd86fbdf
- 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
- 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae