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.
PUBLISHERPOSTGetAllApprovalRequests

Get all the approval requests for the given app (claim status is ignored).

https://partner.steam-api.com/IPublishedFileModerationService/GetAllApprovalRequests/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 Yes
{enum} NoReturn requests for the specified revision.
uint32 NoThe start index of the query.
uint32 NoNumber of requests to return.
PUBLISHERPOSTProcessApprovalRequest

Process the approval request

https://partner.steam-api.com/IPublishedFileModerationService/ProcessApprovalRequest/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint64 Yes
{enum} Yes
uint64 Yes
bool Yes
uint32 Yes