← The evidence ledger
Evidence row 2201268
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://grades-calc.x402tookit.com/reading-planner
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- cd60605d5ac1156a84134352655ff1140abf1fa1225b03e86db8f81fefa6b04c
- Leaf
- 0xf7437fda113ff5e95feae421e9636fe6d6f1d0ab0ab12f4df094be04d71537e5
What was observed
{
"endpoints": [
[
"x402",
"https://grades-calc.x402tookit.com/reading-planner"
]
],
"name": "Grades & Study 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": "Pages per day to finish a reading assignment by the due date, daily minutes at your pace, and a day-by-day page schedule.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"days": 12,
"pagesPerHour": 40,
"totalPages": 300
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-12T01:53:42.801Z",
"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.",
"minutesPerDay": 37.5,
"notChecked": [
"how hard the text is (dense textbooks slow reading a lot)",
"notes, re-reading and discussion time",
"…1 more"
],
"pagesLeft": 300,
"pagesPerDay": 25,
"pagesPerDayRoundedUp": 25,
"percentDone": 0,
"readingDays": 12,
"reasons": [
"Rest days are taken at the end of the window; spread them out in real life if you like."
],
"restDays": 0,
"schedule": [
{
"day": 1,
"fromPage": 1,
"pages": 25,
"toPage": 25
},
{
"day": 2,
"fromPage": 26,
"pages": 25,
"toPage": 50
}
],
"source": "computed locally (pages / days)",
"summary": "300 pages over 12 reading day(s) is 25 pages a day, about 38 minutes at 40 pages an hour.",
"totalHoursLeft": 7.5,
"verdict": "PLANNED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"days": {
"description": "Days you have left to read, 1 to 120",
"type": "integer"
},
"pagesAlreadyRead": {
"description": "Pages already done (default 0)",
"type": "integer"
},
"pagesPerHour": {
"description": "Your reading speed in pages per hour (default 30; novels 40 to 60, textbooks 15 to 25)",
"type": "number"
},
"restDays": {
"description": "Days among those you will not read (default 0)",
"type": "integer"
},
"totalPages": {
"description": "Total pages in the assignment, 1 to 5000",
"type": "integer"
}
},
"required": [
"totalPages",
"days"
],
"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"
]
},
"minutesPerDay": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"pagesLeft": {
"type": [
"null",
"number"
]
},
"pagesPerDay": {
"type": [
"null",
"number"
]
},
"pagesPerDayRoundedUp": {
"type": [
"null",
"number"
]
},
"percentDone": {
"type": [
"null",
"number"
]
},
"readingDays": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"restDays": {
"type": [
"null",
"number"
]
},
"schedule": {
"items": {
"properties": {
"day": {
"type": [
"null",
"number"
]
},
"fromPage": {
"type": [
"null",
"number"
]
},
"pages": {
"type": [
"null",
"number"
]
},
"toPage": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"totalHoursLeft": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:06:54.46Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-02T04:06:54.3Z"
},
"resource": "https://grades-calc.x402tookit.com/reading-planner",
"serviceName": "Grades & Study Calc",
"tags": [
"reading",
"homework",
"planner",
"school"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Pages per day to finish a reading assignment by the due date, daily minutes at your pace, and a day-by-day page schedule."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af