Where is this product cheapest?
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
Answeringour last check, 2026-10-27
1 of 1checks answered this week
642 msmedian answer time
$0.03listed price per call
$0.03price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://asin402.com/api/compare-marketplaces
| Category | Commerce and shopping |
|---|---|
| Provider host | asin402.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-27 | valid payment request | 402 | $0.03 | 642 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"asin": "0735211299"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}