← The evidence ledger
Evidence row 2201484
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://paper-print-calc.x402tookit.com/paper-weight
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- ab937a1b3c4dc6d58d835cec3fe349397820cc07cc6c21dd4c71cba1dbcb6464
- Leaf
- 0x87fc8f19efa85b3ecbfeca379b5ab4efa75fcec300bad95d06b6a99e5c63c10a
What was observed
{
"endpoints": [
[
"x402",
"https://paper-print-calc.x402tookit.com/paper-weight"
]
],
"name": "Paper & Print Calc",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Convert paper gsm to US basis weight (bond, text, cover) and weigh a sheet, a ream or a mailing from its size.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"gsm": 80,
"heightMm": 297,
"sheets": 500,
"widthMm": 210
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-12T01:48:14.938Z",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"equivalentPoundsByType": {
"bond": 21.3,
"book": 54,
"bristol": 36.5,
"cover": 29.6,
"index": 44.3,
"tag": 49.2,
"text": 54
},
"gramsPerSheet": 4.9896,
"gsm": 80,
"heightMm": 297,
"notChecked": [
"envelope, packaging and coating weight",
"moisture content, which changes weight by a few percent",
"…2 more"
],
"ouncesPerSheet": 0.176,
"reasons": [
"Sheet weight = gsm x sheet area in square metres.",
"US basis weights are for 500 sheets of the basic size of each paper type, so equal pounds are different gsm across types."
],
"sheetAreaSquareMeters": 0.06237,
"sheets": 500,
"source": "computed locally (gsm x area; US basis-weight factors)",
"stackGrams": 2494.8,
"stackKilograms": 2.4948,
"stackPounds": 5.5,
"summary": "80 gsm: a 210 x 297 mm sheet weighs 4.99 g; 500 sheets weigh 2.495 kg (5.5 lb).",
"verdict": "COMPUTED",
"widthMm": 210
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"gsm": {
"description": "Paper weight in grams per square metre (use gsm or pounds with type)",
"type": "number"
},
"heightMm": {
"description": "Sheet height in mm (default 297)",
"type": "number"
},
"pounds": {
"description": "US basis weight in pounds (20 lb bond, 80 lb cover ...)",
"type": "number"
},
"sheets": {
"description": "Number of sheets for the stack weight (default 500, a ream)",
"type": "integer"
},
"type": {
"description": "Basis-weight type for pounds: bond, text, book, cover, index, bristol, tag (default bond)",
"type": "string"
},
"widthMm": {
"description": "Sheet width in mm, to weigh a sheet (default 210, A4)",
"type": "number"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"equivalentPoundsByType": {
"properties": {
"bond": {
"type": [
"null",
"number"
]
},
"book": {
"type": [
"null",
"number"
]
},
"bristol": {
"type": [
"null",
"number"
]
},
"cover": {
"type": [
"null",
"number"
]
},
"index": {
"type": [
"null",
"number"
]
},
"tag": {
"type": [
"null",
"number"
]
},
"text": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"gramsPerSheet": {
"type": [
"null",
"number"
]
},
"gsm": {
"type": [
"null",
"number"
]
},
"heightMm": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"ouncesPerSheet": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"sheetAreaSquareMeters": {
"type": [
"null",
"number"
]
},
"sheets": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"stackGrams": {
"type": [
"null",
"number"
]
},
"stackKilograms": {
"type": [
"null",
"number"
]
},
"stackPounds": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"widthMm": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:42:45.573Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:42:45.266Z"
},
"resource": "https://paper-print-calc.x402tookit.com/paper-weight",
"serviceName": "Paper & Print Calc",
"tags": [
"paper",
"gsm",
"basis-weight",
"postage"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Convert paper gsm to US basis weight (bond, text, cover) and weigh a sheet, a ream or a mailing from its size."
}What the leaf hashes
{"body":"ab937a1b3c4dc6d58d835cec3fe349397820cc07cc6c21dd4c71cba1dbcb6464","id":2201484,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646805684638,"prev":null,"subject":"x402_bazaar:https://paper-print-calc.x402tookit.com/paper-weight","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- 0x85123dddb4af3af814b14b1599ed1ee5dc736e48915a1e13d2b44f1ece9c0c4c
- 0x48a7d8a73ff3af602180450d457064aad27e3295ef431b56a3513d559fcaebb0
- 0xb29458b26be0efcbcc070d6949659b739465d717f9b08a7e55e19441848f2850
- 0x650762fd3ea664db9c82e9fa57a70645b039ff3d3dda93972e6da6c3b1355d26
- 0x45296e5ab7be6d8163e528d05039d4c685fc8962fc80b797c1d68574b10b444c
- 0x510fa2c647d18bb802da12cf41e17d136163e6624e69ed77e15235c4284b69c7
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af