← The evidence ledger
Evidence row 547752
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://asin402.com/api/compare-marketplaces
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 60b98a3e49248a3a059c6ea31082a1e66c7860efa16599d793f40809e625fa27
- Leaf
- 0xfe7ff1d9d95a34cf3616ab5de64f063ad3c979dd4c44e18ad16963a4174a6240
What was observed
{
"endpoints": [
[
"x402",
"https://asin402.com/api/compare-marketplaces"
]
],
"name": "ASIN402",
"owner_address": "0x820bb89345d372288c77c65d70b6ca3db395c191",
"raw": {
"accepts": [
{
"amount": "30000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0x820bb89345d372288C77c65d70b6CA3dB395C191",
"scheme": "exact"
}
],
"description": "Where is this product cheapest? One ASIN across 11 Amazon marketplaces. Compares one ASIN's live price on Amazon US, UK, DE, FR, IT, ES, JP, CA, IN, MX and BR, converted to USD with daily ECB rates, and returns the cheapest and most expensive marketplace, the price spread and the difference vs the US. For cross-border shoppers, arbitrage and international sellers. Notes VAT and shipping caveats. Free sample: /api/sample/compare-marketplaces",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"asin": "0735211299"
},
"type": "http"
},
"output": {
"example": {
"asin": "0735211299",
"cheapest": {
"currency": "GBP",
"marketplace": "uk",
"price": 14.99,
"price_usd": 19.27
},
"found_in": 3,
"fx": {
"date": "2026-10-26",
"source": "European Central Bank reference rates"
},
"marketplaces": [
{
"amazon_is_seller": true,
"available": true,
"currency": "GBP",
"marketplace": "uk",
"monthly_sold_estimate": 4000,
"price": 14.99,
"price_basis": "buy_box",
"price_usd": 19.27,
"sales_rank": 35,
"url": "https://www.amazon.co.uk/dp/0735211299"
},
{
"amazon_is_seller": true,
"available": true,
"currency": "EUR",
"marketplace": "de",
"monthly_sold_estimate": 700,
"price": 19.5,
"price_basis": "amazon",
"price_usd": 21.06,
"sales_rank": 410,
"url": "https://www.amazon.de/dp/0735211299"
}
],
"most_expensive": {
"currency": "USD",
"marketplace": "us",
"price": 24.99,
"price_usd": 24.99
},
"notes": [
"Prices are the item price only. European, UK, Japanese, Indian and Brazilian prices include VAT/GST; US and Canadian ..."
],
"priced_in": 3,
"spread_pct": 29.7,
"title": "Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones",
"vs_us_pct": -22.9
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"asin": {
"description": "Amazon ASIN, 10 characters (books: ISBN-10)",
"type": "string"
},
"marketplaces": {
"description": "Optional comma-separated subset of us, uk, de, fr, jp, ca, it, es, in, mx, br (default all 11).",
"type": "string"
}
},
"required": [
"asin"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asin": {
"type": "string"
},
"cheapest": {
"properties": {
"currency": {
"type": "string"
},
"marketplace": {
"type": "string"
},
"price": {
"type": "number"
},
"price_usd": {
"type": "number"
}
},
"type": "object"
},
"found_in": {
"type": "integer"
},
"fx": {
"properties": {
"date": {
"type": "string"
},
"source": {
"type": "string"
}
},
"type": "object"
},
"marketplaces": {
"items": {
"properties": {
"amazon_is_seller": {
"type": "boolean"
},
"available": {
"type": "boolean"
},
"currency": {
"type": "string"
},
"marketplace": {
"type": "string"
},
"monthly_sold_estimate": {
"type": "integer"
},
"price": {
"type": "number"
},
"price_basis": {
"type": "string"
},
"price_usd": {
"type": "number"
},
"sales_rank": {
"type": "integer"
},
"url": {
"type": "string"
}
},
"type": "object"
},
"type": "array"
},
"most_expensive": {
"properties": {
"currency": {
"type": "string"
},
"marketplace": {
"type": "string"
},
"price": {
"type": "number"
},
"price_usd": {
"type": "number"
}
},
"type": "object"
},
"notes": {
"items": {
"type": "string"
},
"type": "array"
},
"priced_in": {
"type": "integer"
},
"spread_pct": {
"type": "number"
},
"title": {
"type": "string"
},
"vs_us_pct": {
"type": "number"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793047148/bazaar-icons/9e69a0fc0922f515.png",
"lastUpdated": "2026-10-27T15:34:50.002Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-27T15:34:49.833Z"
},
"resource": "https://asin402.com/api/compare-marketplaces",
"serviceName": "ASIN402",
"tags": [
"amazon",
"ecommerce",
"product-data",
"price-history",
"fba"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Where is this product cheapest? One ASIN across 11 Amazon marketplaces. Compares one ASIN's live price on Amazon US, UK, DE, FR, IT, ES, JP, CA, IN, MX and BR, converted to USD with daily ECB rates, and returns the cheapest and most expensive marketplace, the price spread and the difference vs the US. For cross-border shoppers, arbitrage and international sellers. Notes VAT and shipping caveats. Free sample: /api/sample/compare-marketplaces"
}What the leaf hashes
{"body":"60b98a3e49248a3a059c6ea31082a1e66c7860efa16599d793f40809e625fa27","id":547752,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133215395364,"prev":null,"subject":"x402_bazaar:https://asin402.com/api/compare-marketplaces","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (273461 rows).
- 0xfe7fcb0b85f872a63ac62ea8ad341eeccb37a560b3ae9ee84389fa50243f719c
- 0xc8cb71a1ff8b2f8c91a294de50f0b9ba9c49e2e232feb56ca556b8a7dd69a198
- 0xab2530831eb7bafa0970ae121c3dd4b81076c67b19655c1d91d7c29c4b08341a
- 0x070eed29264dcd96859ae6ac9fcbdd7542dc429ed36d7001d7afc928ef7a1a20
- 0xe6a3ed1f7ae230434bceff8c40dac1e32dc614489155e6fedb1b9ea1aff1206c
- 0xc22ef3d69bf763572cc8142c794d0a1f47ef122f75a0fe12de2c72d609006b3d
- 0x9c3b68906d92313c59a95ba0d20fedecd7db5195b939ad339ac4f6f7ee2e8256
- 0x965945690c4e58723996f16c8a16231876e39b220c73fcf729c441c06b0bcdec
- 0x7a29b457683886508c8e75acc2cd79d6c6db59618d9fbf86d802126609445657
- 0xf179e4d2b4d92ba70a88e4e0c878d2992c4f8b914d33d3817a4b8a43200735ac
- 0x2e46f3f4a54c5bd4593fdcffcdac06f2162a9caae3cbf2922131682671bb12a1
- 0x405c03a710a7150f5182f236dbd76258bf856f8cdf3ac954821ac082524f65da
- 0x56e872147e60f01cdcee33340b018a7ad7be91ec5b5daef0d2c629c3ca13cbd8
- 0xb5b652bba4a5afca56c21031d89b1c06361563aaf54ccc8541c296ceeb2b66fa
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4