How frequently is data collected from the Fulfillment Inbound Shipment API?
The process runs every hour.
Do you have detailed documentation on this API?
Please refer to Amazon's documentation as we follow it closely:
Does Fulfillment Inbound Shipment have country or Marketplace IDs?
No, not directly. There is no explicit country or marketplace for Inbound Fulfillment. Amazon supplies a fulfillment center ID in the data feed which you can map to a geographic location.
Does Amazon provide a listing of Fulfillment Center IDs?
No, Amazon does not publish a comprehensive listing of all IDs to understand the country, state, or city it resides. Amazon has a partial listing which is the US only.
Are there any other ways to determine the location of a Fulfillment Center ID?
Yes, there are a few options:
You can JOIN on market data from the Advanced Reporting view called mws_fba_daily_inventory_master. This assumes you have Advanced Reporting data feeds.
You can use a lookup file called match fulfillment center ID to a country and region/city. We created one for you to use. See https://docs.google.com/spreadsheets/d/1fXOKQmFvyq8DTmA-zCE9MTdlpemmCaHL5FA89Me9pvU
Lastly, while Amazon may not publish the list, you can find one on Wikipedia: https://en.wikipedia.org/wiki/List_of_Amazon_locations.