← The evidence ledger
Evidence row 563484
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://asin402.com/api/watch
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 469770c41d25424e3ffd04b1fd4e91878cf6685a1fb96507ce7044c81d0602cb
- Leaf
- 0x7440fdea2045c981f4bb11e6dcd35b8e373dbef6aaacabd0aec8593d6507c481
What was observed
{
"endpoints": [
[
"x402",
"https://asin402.com/api/watch"
]
],
"name": "ASIN402",
"owner_address": "0x820bb89345d372288c77c65d70b6ca3db395c191",
"raw": {
"accepts": [
{
"amount": "168000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0x820bb89345d372288C77c65d70b6CA3dB395C191",
"scheme": "exact"
}
],
"description": "Watch Amazon ASINs: scheduled price, buy box and stock checks with change alerts. Pay once to monitor 1-50 ASINs every 1h, 3h, 6h, 12h or 24h for 1-30 days. Each check records buy box, Amazon, lowest new/used price, stock, buy box seller, offer count, sales rank and rating, and logs changes as events (price drops/rises, out of stock, back in stock, buy box seller change, below your target price). Poll the free status URL with your watch key to read new events. The first check runs immediately. P",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"asins": "0735211299,B0F3GWXLTS",
"days": 7,
"interval": "6h",
"price_below": 15
},
"type": "http"
},
"output": {
"example": {
"asins": 2,
"checks_planned": 28,
"current": {
"0735211299": {
"amazon": 23.99,
"buy_box": 24.99,
"in_stock": true,
"new_lowest": 18.5,
"new_offers": 7,
"sales_rank": 3840
}
},
"days": 7,
"interval": "6h",
"key": "wk_secret-shown-once",
"marketplace": "us",
"next_check": "2026-10-28T02:00:00.000Z",
"price_paid": "$0.336",
"status_url": "https://asin402.com/api/watch/w_AbCdEf123456?key=wk_secret-shown-once",
"watch_id": "w_AbCdEf123456"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"asins": {
"description": "1-50 comma-separated ASINs (or an array in a POST body)",
"type": "string"
},
"buybox": {
"description": "1 (default) tracks buy box price and seller. 0 = cheaper: Amazon and lowest offer prices only",
"enum": [
0,
1
],
"type": "integer"
},
"days": {
"description": "How long to watch, 1-30 days. Default 7",
"type": "integer"
},
"domain": {
"description": "Marketplace: us, uk, de, fr, jp, ca, it, es, in, mx, br. Default us",
"type": "string"
},
"interval": {
"description": "Time between checks. Default 6h",
"enum": [
"1h",
"3h",
"6h",
"12h",
"24h"
],
"type": "string"
},
"min_change_pct": {
"description": "Ignore price moves smaller than this percent. Default 1",
"type": "number"
},
"price_below": {
"description": "Optional target: an event fires when the price falls to or below this (marketplace currency)",
"type": "number"
}
},
"required": [
"asins"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asins": {
"type": "integer"
},
"checks_planned": {
"type": "integer"
},
"current": {
"properties": {
"0735211299": {
"properties": {
"amazon": {
"type": "number"
},
"buy_box": {
"type": "number"
},
"in_stock": {
"type": "boolean"
},
"new_lowest": {
"type": "number"
},
"new_offers": {
"type": "integer"
},
"sales_rank": {
"type": "integer"
}
},
"type": "object"
}
},
"type": "object"
},
"days": {
"type": "integer"
},
"interval": {
"type": "string"
},
"key": {
"type": "string"
},
"marketplace": {
"type": "string"
},
"next_check": {
"type": "string"
},
"price_paid": {
"type": "string"
},
"status_url": {
"type": "string"
},
"watch_id": {
"type": "string"
}
},
"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": "2026-10-27T21:22:08.706Z",
"quality": {
"lastCalledAt": "2026-10-27T21:22:08.706Z"
},
"resource": "https://asin402.com/api/watch",
"serviceName": "ASIN402",
"tags": [
"amazon",
"ecommerce",
"product-data",
"price-history",
"fba"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Watch Amazon ASINs: scheduled price, buy box and stock checks with change alerts. Pay once to monitor 1-50 ASINs every 1h, 3h, 6h, 12h or 24h for 1-30 days. Each check records buy box, Amazon, lowest new/used price, stock, buy box seller, offer count, sales rank and rating, and logs changes as events (price drops/rises, out of stock, back in stock, buy box seller change, below your target price). Poll the free status URL with your watch key to read new events. The first check runs immediately. P"
}What the leaf hashes
{"body":"469770c41d25424e3ffd04b1fd4e91878cf6685a1fb96507ce7044c81d0602cb","id":563484,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793137725875679,"prev":null,"subject":"x402_bazaar:https://asin402.com/api/watch","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).
- 0x74406b102181b3d198393d32550e3fb5689d7a98b98ec6ad886f3314f788c3ad
- 0x74fbec8b57f64bb41fdebd2006c10b100502fe0e0c2ca8414fa004a9b42291e9
- 0x0e24badc68a75e06ac62260aa72f9ea11db9cb4bf0da2517f2939747b09b1fbf
- 0x4f6695232c5d8f8d3c36a0f0a08fdf8b1d0f8a01dbb3ce2394eb19d0eb7eabc6
- 0x978afdee4e301c8b01847aa58de26806c0fdce7c4e561a5f214d159d9d39eda7
- 0xf8f82deb3f284250d37d5d74a065096120347bac08f8fa114bb1a88c49466f7c
- 0xd101f6a24228faf7bcee8897365b23fe9bf7587a3a5ec56010bdfc59659e0872
- 0x57bca7fdfae567934a78667d25fed6e8525c4f41929fcd359a7859f2b813bafa
- 0x46b7c28b01d7af0d32cc14b994f8d97384f0c739e179d9927629ef1ee652003d
- 0xf7183cba9cd67699064b26ea6acbfa032bf68cacd6fd90929c591383c8d3d989
- 0x87d9722f6144a6bdbc601abce8aa277e4125cc680211131dcb21639e43daeffd
- 0x58a1b7d7965722efb70d69acfb10b39e77f817864b8d4b4069d33ff29884a3bd
- 0x4094bd5bc2ab60e4518d1ee8a13455a69d7484ea62ecdca2618d0f39d3403503
- 0x9848c068b1371232529d2b5738fdc45b854c57da041b69ea7c9e112b14e2d9d1
- 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
- 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
- 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
- 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
- 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4