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.
UNDOCUMENTEDPOSTAddBranchToAssetSet
https://api.steampowered.com/IAssetSetPublishingService/AddBranchToAssetSet/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
fixed64 No
string No
UNDOCUMENTEDPOSTCreateAssetSet
https://api.steampowered.com/IAssetSetPublishingService/CreateAssetSet/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
CAssetSet No
↳ uint32 No
↳ fixed64 No
↳ string No
↳ string No
↳ string[] No
↳ uint32 No
↳ uint32 No
↳ uint32 No
UNDOCUMENTEDPOSTDeleteAssetSet
https://api.steampowered.com/IAssetSetPublishingService/DeleteAssetSet/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
fixed64 No
UNDOCUMENTEDGetAllAssetSets
https://api.steampowered.com/IAssetSetPublishingService/GetAllAssetSets/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
UNDOCUMENTEDPOSTRemoveBranchFromAssetSet
https://api.steampowered.com/IAssetSetPublishingService/RemoveBranchFromAssetSet/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
fixed64 No
string No
UNDOCUMENTEDPOSTSwapAssetSetPriority
https://api.steampowered.com/IAssetSetPublishingService/SwapAssetSetPriority/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
fixed64 No
fixed64 No
UNDOCUMENTEDPOSTUpdateAssetSet
https://api.steampowered.com/IAssetSetPublishingService/UpdateAssetSet/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
CAssetSet No
↳ uint32 No
↳ fixed64 No
↳ string No
↳ string No
↳ string[] No
↳ uint32 No
↳ uint32 No
↳ uint32 No
UNDOCUMENTEDPOSTUpdatePublishTime
https://api.steampowered.com/IAssetSetPublishingService/UpdatePublishTime/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
fixed64 No