If you already have ASINs and need the matching identifiers, this API helps you look up UPC, EAN, ISBN, and related barcode values in a repeatable way.
Use it to clean up catalogs, fill missing barcode fields, or match Amazon listings with supplier records.
curl -X POST "https://app.rocketsource.io/api/v3/asin-convert" \
-H "Authorization: Bearer YOUR_TOKEN" \
-H "Content-Type: application/json" \
-d '{"marketplace":"US","asins":["B0D1XD1ZV3"]}'const response = await fetch(
"https://app.rocketsource.io/api/v3/asin-convert",
{
method: "POST",
headers: {
Authorization: "Bearer YOUR_TOKEN",
"Content-Type": "application/json",
},
body: JSON.stringify({ marketplace: "US", asins: ["B0D1XD1ZV3"] }),
}
);
const identifiers = await response.json();Add barcode fields to internal product records before exporting, syncing, or matching them with supplier data.
Fill gaps in incoming catalogs when the ASIN is known but the barcode data is missing or inconsistent.
Use ASIN lookups to match records across Amazon, supplier catalogs, and your own inventory files.
Replace one-off lookups with a batch request that returns the identifiers in a consistent format.
Submit the ASINs you want to enrich and keep your request focused on the records you need right now.
Use the marketplace that matches the catalog or region you are working with.
Review the response for UPC, EAN, ISBN, and other identifiers that are available for each ASIN.
Plan for products that do not have every identifier type, and let your integration continue when some values are missing.
No. Some ASINs have missing or partial identifier data, so the response only includes what is available.
Yes. A single ASIN may return multiple values for a given identifier type, depending on the catalog data available.
The technical docs allow up to 1,000 ASINs per request for the reverse conversion endpoint.
The ASIN conversion section in the API docs shows the request shape and the identifier map returned by the endpoint.
Read the technical documentation, or compare plans when you are ready to use the API.