The only thing I found is the tracking ids from
Manage Your Tracking IDs page.
However this ids are limited to 100 values by default (you need to contact amazon for more). This is what they answered me:
I understand you'd like to view reporting within Products Advertising
API.
All reports are housed on your Associates account for you to view the
activity of your links.
We do offer multiple tracking IDs so that Associates can track the
activity of individual links easily and accurately.
You can create up to 100 tracking IDs in your account by visiting the
Account Settings section of Associates Central. You'll find a link in
the Account Information section labeled Manage your tracking IDs:
https://affiliate-program.amazon.com/gp/associates/network/your-account/manage-t...
Once you've created your additional tracking IDs, to view these IDs,
please log into Associates Central (http://associates.amazon.com).
Once logged in, click on the drop down box under Tracking ID to change
which ID you are working with.
If you are interested in receiving more than 100 tracking IDs, please
first create this amount via your associate account in Associate
Central. If you have already created 100 tracking IDs in your account
and are needing additional tracking IDs, please use the link below to
write back to us with a detailed description of how you'll be using
these additional ID: