← The evidence ledger
Evidence row 2202014
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://css-design-calc.x402tookit.com/pixel-density
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 0f39adfca0d17a4f6ad814ed56744cf81595e031ad94c53894a6346ddcef3f6d
- Leaf
- 0xd212661b3cc03e1817caa986c33f319a4f345eff5f5683e214d04814d2309e19
What was observed
{
"endpoints": [
[
"x402",
"https://css-design-calc.x402tookit.com/pixel-density"
]
],
"name": "CSS Design 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": "Screen pixel density (PPI) from resolution and diagonal, physical size, CSS viewport at a device pixel ratio, and image widths.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"cssWidth": 400,
"diagonalIn": 27,
"dpr": 1,
"heightPx": 1440,
"widthPx": 2560
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T14:32:44.713Z",
"cssPixelPhysicalMm": 0.233487,
"cssViewportHeight": 1440,
"cssViewportWidth": 2560,
"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.",
"dotPitchMm": 0.23349,
"dpr": 1,
"heightInches": 13.2371,
"heightMm": 336.221,
"idealDprForReferencePixel": 1.1332,
"imageWidthsForCssWidth": {
"1.5x": 600,
"1x": 400,
"2x": 800,
"3x": 1200,
"atThisDpr": 400,
"cssWidth": 400
},
"megapixels": 3.6864,
"notChecked": [
"the real device pixel ratio (browsers and OS scaling set it, not the panel)",
"non-square pixels and pentile subpixel layouts",
"…2 more"
],
"ppi": 108.7855,
"ppiClass": "STANDARD",
"reasons": [
"One CSS pixel spans 0.00919 in (0.2335 mm) on this screen at DPR 1; the CSS reference pixel is 1/96 in.",
"Bands: under 120 PPI standard, 120 to 220 high, above 220 very high."
],
"source": "PPI = sqrt(w^2 + h^2) / diagonal; CSS reference pixel = 1/96 in; computed locally",
"summary": "2560 x 1440 on a 27 inch screen is 108.79 PPI (23.53 x 13.24 in); 2560 x 1440 CSS px at DPR 1.",
"verdict": "STANDARD",
"widthInches": 23.5325,
"widthMm": 597.727
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"cssWidth": {
"description": "A CSS width in px to compute image pixel widths for (default 100)",
"type": "number"
},
"diagonalIn": {
"description": "Screen diagonal in inches",
"type": "number"
},
"dpr": {
"description": "Device pixel ratio the browser reports (default 1)",
"type": "number"
},
"heightPx": {
"description": "Vertical resolution in physical pixels",
"type": "number"
},
"widthPx": {
"description": "Horizontal resolution in physical pixels",
"type": "number"
}
},
"required": [
"widthPx",
"heightPx",
"diagonalIn"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"cssPixelPhysicalMm": {
"type": [
"null",
"number"
]
},
"cssViewportHeight": {
"type": [
"null",
"number"
]
},
"cssViewportWidth": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"dotPitchMm": {
"type": [
"null",
"number"
]
},
"dpr": {
"type": [
"null",
"number"
]
},
"heightInches": {
"type": [
"null",
"number"
]
},
"heightMm": {
"type": [
"null",
"number"
]
},
"idealDprForReferencePixel": {
"type": [
"null",
"number"
]
},
"imageWidthsForCssWidth": {
"properties": {
"1.5x": {
"type": [
"null",
"number"
]
},
"1x": {
"type": [
"null",
"number"
]
},
"2x": {
"type": [
"null",
"number"
]
},
"3x": {
"type": [
"null",
"number"
]
},
"atThisDpr": {
"type": [
"null",
"number"
]
},
"cssWidth": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"megapixels": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"ppi": {
"type": [
"null",
"number"
]
},
"ppiClass": {
"type": [
"null",
"string"
]
},
"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"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:46:53.199Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:46:53.01Z"
},
"resource": "https://css-design-calc.x402tookit.com/pixel-density",
"serviceName": "CSS Design Calc",
"tags": [
"css",
"ppi",
"dpr",
"responsive-images"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Screen pixel density (PPI) from resolution and diagonal, physical size, CSS viewport at a device pixel ratio, and image widths."
}What the leaf hashes
{"body":"0f39adfca0d17a4f6ad814ed56744cf81595e031ad94c53894a6346ddcef3f6d","id":2202014,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646811353276,"prev":null,"subject":"x402_bazaar:https://css-design-calc.x402tookit.com/pixel-density","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).
- 0xd2122f63694a6ca4284351abc4e8577bdd9a8acd97ba3e5e507289611ffc2412
- 0x81168e739f4727db5d69eb13d7fdfb85b3338f1ead49fd7df6b267c427aa7eff
- 0xc00b532dff73eb572650c30c6994109dd0df0c7912f2ace2ba7e35555a7c1360
- 0xfbbacb6323099cb56902da10242008a4822b7ed57415843eed551b0c18668bfb
- 0x6de60699d548788c629d7ea36d70e1f419eaf89b0f8b82b9becf538563862f0d
- 0xabe9d5902c698b221e0065341f86a65a2723b141c1da66fde55eaeb5d8057069
- 0xab5d78dd83f9bbe6ce35235c2b49366ec7f1994a47944277b76ed74e8174068b
- 0x1bb0fdd3f4c5edf54dc45e90f8a1b1d15f1b4116cd74d723392bf90bbb85d0a1
- 0x14a05beda3fdffd34b77e38f925e5ea2fd4ac1df73e31df142b5fa87a06abdf5
- 0xceab9767caaf2dbbcf2500eb0295a2a066e218dceae2be34c98a13e2a0b0a459
- 0x927c05a5d8546f863bef20833d98f1e1c35c8e5ccf50b0ad910c73799ef2e337
- 0x8f7ec337f2782ee71c5fcf875ded67ab29b3a792b4ec497a9bd69388793bc4bb
- 0x0ee251e21135d18ee3004d16c3618e1f970e8952654b422f2554f8aa0ae09b4f
- 0x0a363925e7ecbf308dcd4c5e94385984a43aafeb977e419f632e8dc2019e0553
- 0xa9134f4ed9cec34e13ba243b6a51db73753dbbb3b48c63bd82b22694813d2b02
- 0x7ddefa7d79e7640c3fed21ee4472689415182c41a0258ab04a81d60495f4c40a
- 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
- 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af