← The evidence ledger
Evidence row 2201481
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://paper-print-calc.x402tookit.com/us-paper
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 22d08ef478a95dff053c429ddcd6f994b6d5afd25e381ae7401a690e5dc0e735
- Leaf
- 0x6781ec24cf7a2c9a15a52447d9a242ffe5d61a756644a9e8540df5a097f87995
What was observed
{
"endpoints": [
[
"x402",
"https://paper-print-calc.x402tookit.com/us-paper"
]
],
"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": "Letter, Legal, Tabloid, ANSI A-E and Architectural A-E paper sizes in inches, mm and points, with the closest ISO size.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"name": "letter"
},
"type": "http"
},
"output": {
"example": {
"areaSquareInches": 93.5,
"asOf": "2026-10-12T01:48:15.728Z",
"aspectRatio": 1.2941,
"closestIso": {
"heightMm": 297,
"mismatchMm": 23.5,
"name": "A4",
"widthMm": 210
},
"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.",
"heightInches": 11,
"heightMm": 279.4,
"heightPoints": 792,
"name": "letter",
"notChecked": [
"printer-specific margins and non-printable areas",
"metric tolerances of imported paper",
"…1 more"
],
"reasons": [
"Letter is slightly wider and shorter than A4."
],
"source": "computed locally (ANSI/ASME Y14.1 and common US sizes)",
"summary": "letter is 8.5 x 11 in (215.9 x 279.4 mm); closest ISO size A4.",
"verdict": "COMPUTED",
"widthInches": 8.5,
"widthMm": 215.9,
"widthPoints": 612
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"name": {
"description": "One of: letter, legal, junior-legal, tabloid, ledger, executive, statement, government-letter, ansi-a, ansi-b, ansi-c, ansi-d, ansi-e, arch-a, arch-b, arch-c, arch-d, arch-e, arch-e1",
"type": "string"
}
},
"required": [
"name"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"areaSquareInches": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"aspectRatio": {
"type": [
"null",
"number"
]
},
"closestIso": {
"properties": {
"heightMm": {
"type": [
"null",
"number"
]
},
"mismatchMm": {
"type": [
"null",
"number"
]
},
"name": {
"type": [
"null",
"string"
]
},
"widthMm": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"heightInches": {
"type": [
"null",
"number"
]
},
"heightMm": {
"type": [
"null",
"number"
]
},
"heightPoints": {
"type": [
"null",
"number"
]
},
"name": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"widthInches": {
"type": [
"null",
"number"
]
},
"widthMm": {
"type": [
"null",
"number"
]
},
"widthPoints": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:42:54.473Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:42:54.298Z"
},
"resource": "https://paper-print-calc.x402tookit.com/us-paper",
"serviceName": "Paper & Print Calc",
"tags": [
"paper",
"letter",
"ansi",
"sizes"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Letter, Legal, Tabloid, ANSI A-E and Architectural A-E paper sizes in inches, mm and points, with the closest ISO size."
}What the leaf hashes
{"body":"22d08ef478a95dff053c429ddcd6f994b6d5afd25e381ae7401a690e5dc0e735","id":2201481,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646805675039,"prev":null,"subject":"x402_bazaar:https://paper-print-calc.x402tookit.com/us-paper","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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- 0xc1665a4ef57850efe85e4f79ccbcd93c91f77034305ce957cf2bfdd662fed04e
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- 0x3d3813bcecde455b3971661a1ae43de0cdb253873cfc2d80d4a9077c5852fd91
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af