← The evidence ledger
Evidence row 2202112
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://chess-notation.x402tookit.com/material-count
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 11443ae29224c55cffabd2537a9b6d10ce3295b97b31979081947496196a305b
- Leaf
- 0xcf5aff4aa300317dbff41bb7cf3d933c2ac48b9b0f81b60df8636e4f19e90704
What was observed
{
"endpoints": [
[
"x402",
"https://chess-notation.x402tookit.com/material-count"
]
],
"name": "Chess Notation Tools",
"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": "Material balance from a FEN: standard 1-3-3-5-9 point totals per side, difference and piece lists.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"fen": "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-12T01:02:03.583Z",
"black": {
"bishops": 2,
"knights": 2,
"pawns": 8,
"queens": 1,
"rooks": 2
},
"blackHasBishopPair": true,
"blackPoints": 39,
"degraded": false,
"difference": 0,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"positional factors, king safety, pawn structure or activity",
"the bishop-pair bonus and other refinements",
"…1 more"
],
"reasons": [
"Values: pawn 1, knight 3, bishop 3, rook 5, queen 9; kings are not counted."
],
"source": "computed locally (conventional piece values)",
"summary": "White 39, Black 39: equal material.",
"verdict": "EQUAL_MATERIAL",
"white": {
"bishops": 2,
"knights": 2,
"pawns": 8,
"queens": 1,
"rooks": 2
},
"whiteHasBishopPair": true,
"whitePoints": 39
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"fen": {
"description": "A FEN string (only the placement field is read)",
"type": "string"
}
},
"required": [
"fen"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"black": {
"properties": {
"bishops": {
"type": [
"null",
"number"
]
},
"knights": {
"type": [
"null",
"number"
]
},
"pawns": {
"type": [
"null",
"number"
]
},
"queens": {
"type": [
"null",
"number"
]
},
"rooks": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"blackHasBishopPair": {
"type": [
"boolean",
"null"
]
},
"blackPoints": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"difference": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"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"
]
},
"white": {
"properties": {
"bishops": {
"type": [
"null",
"number"
]
},
"knights": {
"type": [
"null",
"number"
]
},
"pawns": {
"type": [
"null",
"number"
]
},
"queens": {
"type": [
"null",
"number"
]
},
"rooks": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"whiteHasBishopPair": {
"type": [
"boolean",
"null"
]
},
"whitePoints": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:41:58.694Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:41:58.41Z"
},
"resource": "https://chess-notation.x402tookit.com/material-count",
"serviceName": "Chess Notation Tools",
"tags": [
"chess",
"material",
"balance",
"fen"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Material balance from a FEN: standard 1-3-3-5-9 point totals per side, difference and piece lists."
}What the leaf hashes
{"body":"11443ae29224c55cffabd2537a9b6d10ce3295b97b31979081947496196a305b","id":2202112,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646812530219,"prev":null,"subject":"x402_bazaar:https://chess-notation.x402tookit.com/material-count","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).
- 0xcf5af0d275f04b38e162dfc896110d0b52824ddd58f9ed9af6a09dcf67d6e327
- 0x255ee205f093380d882e2dd1fdef908b5d9a478aad3d32f4a30c51fb27a3b9b2
- 0xae2fdbafcefe7c14455e0377617154dd21d9713213c06166de68b2f4cd6edfd6
- 0x22e7586da9de54196f6dad5f798404f5e92ddd6f52b9e765866f5dd88177448a
- 0x7988e51e00cb22e0fa84468ab116217d2e8ede8a1a558fcfc05588dd5639cd58
- 0x59fe4e607fe5446bffccbc3d1bc502185eed098e972e23f6be5189f134bd3a2e
- 0x422bb9d1436580812d94480c6986ed818722f08004f4050e3efe7930dcce9c84
- 0x00b766c80dc9bb8e32d7c02a96004a9bae7ee3ba3e5bb4f35176eaf3fc86f4b7
- 0xba9076acce1637bbc14e27c339db19218784622d72396ea1334b5b0a1566959d
- 0x8c96086eed535c7e6e898a406ed456219da2f756e9f7e9ef7ae4fc72cc8bdf30
- 0x72ab42f3c5a6ef5a4044ef2fdc6891273b02682b594ac6044b122a6461ad0992
- 0xdd70b02ace47c3d130058a43d9d07b1c248c91e80e9c82aa580d25929a652bb8
- 0x072f2f6577fd7448e35dd54b73d821e24c8d625a3295181aa05e7da8bcdbf170
- 0x4f21464039902a4044b17c93873adb5a93eecc8e977b4e039acb8cd5f4210b4b
- 0x5b456020389d8e0ef67f16a492c600b5b88189e59398bba308734db7e873e7e4
- 0x37d31d28d0bd3743650d57e9fbf999efa4592cac831267f83aa125335b35a16b
- 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
- 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af