Amazon ASIN ↔ GTIN Conversion — Lookup Endpoints

Glade provides two lightweight conversion endpoints that let you translate between Amazon ASINs and GTINs (Global Trade Item Numbers such as UPCs and EANs). Use these when you need to reconcile your product catalog against Amazon listings, enrich retail data with Amazon identifiers, or cross-reference inventory systems that speak different identifier formats.

GTIN from ASIN

Look up the GTIN (barcode) associated with a given Amazon ASIN. Returns null when Amazon has not registered a GTIN for the product.

Request

GET https://api.glade.dev/api/amazon/product/gtin-from-asin

Query Parameters

string

default:"US"

The Amazon marketplace to query. Accepted values: US UK CA DE FR IT ES AU IN MX BR JP PL. Defaults to US when omitted.

string

required

The Amazon Standard Identification Number to convert (e.g. B09XS7JWHH). This parameter is required.

Response

object

Hide amazonProduct fields

string

The ASIN that was looked up, echoed back in the response.

string | null

The GTIN (UPC, EAN, or ISBN) associated with this ASIN, or null if one is not available.

Example Response

{
  "data": {
    "amazonProduct": {
      "asin": "B09XS7JWHH",
      "gtin": "027242921436"
    }
  }
}

Null response (no GTIN registered)

{
  "data": {
    "amazonProduct": {
      "asin": "B09XS7JWHH",
      "gtin": null
    }
  }
}

curl Example

curl --request GET \
  --url 'https://api.glade.dev/api/amazon/product/gtin-from-asin?asin=B09XS7JWHH&domain=US' \
  --header 'API-KEY: YOUR_API_KEY'

ASIN from GTIN

Look up the Amazon ASIN that corresponds to a given GTIN (barcode). Returns null when no matching Amazon listing is found in the specified marketplace.

Request

GET https://api.glade.dev/api/amazon/product/asin-from-gtin

Query Parameters

string

default:"US"

The Amazon marketplace to query. Accepted values: US UK CA DE FR IT ES AU IN MX BR JP PL. Defaults to US when omitted.

string

required

The GTIN (UPC, EAN, or ISBN) to convert (e.g. 027242921436). This parameter is required.

Response

object

Hide amazonProduct fields

string | null

The ASIN of the matching Amazon product, or null if no listing is found in the specified marketplace.

string

The GTIN that was looked up, echoed back in the response.

Example Response

{
  "data": {
    "amazonProduct": {
      "asin": "B09XS7JWHH",
      "gtin": "027242921436"
    }
  }
}

Null response (no matching listing)

{
  "data": {
    "amazonProduct": {
      "asin": null,
      "gtin": "027242921436"
    }
  }
}

curl Example

curl --request GET \
  --url 'https://api.glade.dev/api/amazon/product/asin-from-gtin?gtin=027242921436&domain=US' \
  --header 'API-KEY: YOUR_API_KEY'

Error Handling

Both endpoints use the same error envelope. The HTTP status code mirrors the code field inside the errors array.

Status	Meaning
`400`	Bad request — a required parameter is missing or malformed.
`401`	Unauthorized — your API key is missing or invalid.
`402`	Payment required — your plan limit has been reached.
`429`	Too many requests — you have exceeded the rate limit for your plan.
`502`	Bad gateway — Amazon returned an unexpected response; retry with exponential back-off.

{
  "success": false,
  "errors": [
    {
      "code": 400,
      "message": "Missing required parameter: asin"
    }
  ]
}

Products

Search & Discovery

Sellers & Categories

Amazon ASIN ↔ GTIN Conversion — Lookup Endpoints

GTIN from ASIN

Request

Query Parameters

Response

Example Response

Null response (no GTIN registered)

curl Example

ASIN from GTIN

Request

Query Parameters

Response

Example Response

Null response (no matching listing)

curl Example

Error Handling

​GTIN from ASIN

​Request

​Query Parameters

​Response

​Example Response

​Null response (no GTIN registered)

​curl Example

​ASIN from GTIN

​Request

​Query Parameters

​Response

​Example Response

​Null response (no matching listing)

​curl Example

​Error Handling

GTIN from ASIN

Request

Query Parameters

Response

Example Response

Null response (no GTIN registered)

curl Example

ASIN from GTIN

Request

Query Parameters

Response

Example Response

Null response (no matching listing)

curl Example

Error Handling