This page is just a reference of all the known Steam APIs, I do not know how they work. Please do not email me with questions.
UNDOCUMENTEDGetCountryList
https://api.steampowered.com/IStoreTopSellersService/GetCountryList/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
string No
https://api.steampowered.com/IStoreTopSellersService/GetWeeklyTopSellers/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
string No2-character country code; leave blank for global. Always pass user country in the context object.
StoreBrowseContext No
string No
int32 No
string No
StoreBrowseItemDataRequest No
bool No
bool No
bool No
bool No
bool No
bool No
bool No
int32 No
bool No
bool No
bool No
bool No
bool No
StoreBrowseItemDataRequest No
bool No
bool No
bool No
uint32 NoStart date of the week to return. Leave blank for current week.
int32 NoFor pagination, start at the Nth top seller.
int32 No# of top sellers to return per page.