Quoting rdodolak:

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Just out of curiosity how does API know which account is making the request?  Is it the affiliate ID?

There is a unique key assigned to AWS developers. My question was basically could that be correlated to the affiliate ID? I don't know, but if so, that might be a solution.

Quoting DJ Doena:

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Quoting mediadogg:

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Sadly, nobody has ever used them! 

yup

So, if someone were to use it would your access be restored for a period of time or do you have to reapply for access to the Product API?

If you used your own links when purchasing product do those sales also count toward access?  I do know you won't get commission on your own orders, but I'm curious if that would restore access too.

EDIT: I found the terms and conditions and it doesn't appear to be a very viable option.

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Each account used for Product Advertising API is allowed an initial usage limit of 8640 requests per day (TPD) subject to a maximum of 1 request per second (TPS). Your account will receive an additional 1 TPD for every 5 cents or 1 TPS (up to a maximum of 10) for every $4320 of shipped item revenue generated via the use of Product Advertising API for shipments in the last 30 days.

Note that your account will lose access to Product Advertising API if it has not generated referring sales using PA API in the last 30 days.

Quoting DJ Doena:

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Don't know, never lost it.

Well let's find out, I just placed an order with your Amazon link.

Quoting CTbrthrhd:

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The remote server returned an error: (503) Server Unavailable

Getting that error now.

Quoting CubbyUps:

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Still getting that 503 error.

I tried to get the UPC for Boomer seasons and the converter comes up with that 503 error.
https://www.amazon.com/exec/obidos/ASIN/B07PMLY2QH/
https://www.amazon.com/Heres-Boomer-Season-1/dp/B07PNK9YQK/

It means no one has made a purchase with DJ Doena's Amazon link.  I made  purchase back in January and within a few days the functionality was restored, but if a purchase isn't made after a period of time (i.e. a month+) then access to the API is cut off again by Amazon.

But, here are the associated UPCs:

B07PMLY2QH - 810017880447
B07PNK9YQK - 810017880430

Quoting CTbrthrhd:

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This will work as well in the interim, albeit slightly more time consuming.

https://algopix.com/tools/asin-to-upc

Way cool. Thanks.

I parsed the page source for you, example: https://algopix.com/online-tools/convert?from=ASIN&to=UPC&value=B07PNK9YQK

I suspect they will notice abuse and shut down free useage. Be mindful. Page HTML mentions a limit of 30 requests.

(The reverse is supposedly available, but I couldn't get that to work the same way.)

Quoting rdodolak:

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CamelCamelCamel.com will also provide the UPC on the product details tab after searching by ASIN.  Their EAN is off though as they seem to truncate the last digit for US releases anyway.

They cut off the last digit. A bit annoying but it helps a little, thanks!

https://www.marktplatz-tools.de/asin_ean_convert.php
This site works great, at least with german EAN but it's only allowed to search once every one to two  minutes. A pain with a 10 for 50 bucks sale at amazon