使用Boto调用Amazon MWS欧洲站点时遭AccessDenied错误求助

Hey there, since your US MWS calls work perfectly, the issue is almost certainly tied to Europe-specific configuration rather than your core credentials or basic code logic. Let’s walk through the most common fixes:

1. Verify MWS Authorization for European Regions #

Having a European seller account doesn’t automatically grant you MWS access there—MWS permissions are strictly region-specific. Log into your European seller dashboard (for the specific marketplace you’re targeting, like the UK), navigate to the MWS developer permissions section, and confirm:

• Your AWS access key is authorized for the European MWS endpoint
• The authorization status is active (not expired or revoked)

2. Use the Correct European Seller ID #

Your US Seller ID won’t work for European calls—each region has its own unique Seller ID. Log into your European seller account, find your region-specific Seller ID (check the "Account Settings" area), and replace the sellerId value in your code with this European-specific ID.

3. Double-Check Marketplace ID and Endpoint Match #

You’re using A1PA6795UKMFR9 (UK marketplace ID) with mws-eu.amazonservices.com, which is correct—most European marketplaces share this endpoint. Just keep in mind that if you switch to other EU markets (like Germany or France), you’ll need to use their corresponding Marketplace IDs (though the endpoint stays the same).

4. Adjust How You Pass the Seller ID #

In some versions of boto, setting connect.SellerId after initialization can cause unexpected parameter issues. Try passing the Seller ID directly when creating the MWSConnection instead:

connect = connection.MWSConnection(
    aws_access_key_id=access_key,
    aws_secret_access_key=secret_key,
    host="mws-eu.amazonservices.com",
    SellerId=sellerId  # Pass here instead of assigning later
)

Then remove the separate connect.SellerId=sellerId line from your code.

5. Confirm API Permission for GetCompetitivePricingForASIN #

Make sure your European MWS authorization explicitly includes the GetCompetitivePricingForASIN API action. Sometimes sellers only grant access to a subset of APIs for a region, so double-check that this specific call is allowed in your European MWS permissions.

If none of these steps resolve the issue, try capturing the full error response details (not just the generic AccessDenied message)—MWS often includes additional context in the response body that can pinpoint the exact problem (like missing permissions, an inactive account, etc.).

内容的提问来源于stack exchange，提问作者morea030