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.
https://api.steampowered.com/IPartnerDeadlineService/GetDeadlineByTimeRange/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
int32 Noenum
uint32 No
uint32 No
bool No
int32 Noenum
uint32 No
https://api.steampowered.com/IPartnerDeadlineService/GetDeadlinesForPartner/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
uint32 No
uint32 No
bool No
CPartnerDeadlineLookUpKey[] No
fixed64 No
uint32 No
int32 Noenum
fixed64 No
int32 Noenum
uint32 No
uint32 No
uint32 No
uint32 No