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.
UNDOCUMENTEDPOSTCreatePlan
https://api.steampowered.com/IPromotionPlanningService/CreatePlan/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
CPromotionPlan No
fixed64 No
string No
string No
string No
uint32 No
uint32 No
uint32 No
string No
uint32 No
string No
string No
string No
string No
UNDOCUMENTEDPOSTCreateSalePageForPromo
https://api.steampowered.com/IPromotionPlanningService/CreateSalePageForPromo/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
fixed64 No
uint32 No
uint32 No
fixed64 No
fixed64 No
bool No
uint32 No
uint32 No
UNDOCUMENTEDPOSTCreateTentativePlan
https://api.steampowered.com/IPromotionPlanningService/CreateTentativePlan/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
CPromotionPlan No
fixed64 No
string No
string No
string No
uint32 No
uint32 No
uint32 No
string No
uint32 No
string No
string No
string No
string No
UNDOCUMENTEDPOSTDeletePlan
https://api.steampowered.com/IPromotionPlanningService/DeletePlan/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
fixed64 No
https://api.steampowered.com/IPromotionPlanningService/GetAdvertisingAppsForPartner/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
UNDOCUMENTEDGetAllActivePlan
https://api.steampowered.com/IPromotionPlanningService/GetAllActivePlan/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
UNDOCUMENTEDGetAllPlansForApps
https://api.steampowered.com/IPromotionPlanningService/GetAllPlansForApps/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32[] No
bool No
bool No
https://api.steampowered.com/IPromotionPlanningService/GetAllPlansForPartner/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
uint32 No
uint32 No
bool No
uint32 No
uint32 No
UNDOCUMENTEDGetPlan
https://api.steampowered.com/IPromotionPlanningService/GetPlan/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
fixed64 No
https://api.steampowered.com/IPromotionPlanningService/GetPlanByAssociationID/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
CPromoAssociation[] No
int32 Noenum
fixed64 No
fixed64 No
https://api.steampowered.com/IPromotionPlanningService/GetPlanByInputAccessKey/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
string No
https://api.steampowered.com/IPromotionPlanningService/GetPlanCompletedInDateRange/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
uint32 No
string[] No
https://api.steampowered.com/IPromotionPlanningService/GetPlansUpdatedSince/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
uint32 No
https://api.steampowered.com/IPromotionPlanningService/GetPromotionPlanForSalePages/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
CPromotionPlanning_GetPromotionPlanForSalePages_Request_CSalePage[] No
uint32 No
fixed64 No
https://api.steampowered.com/IPromotionPlanningService/GetPromotionPlanSalesDaily/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint64[] No
uint32 No
https://api.steampowered.com/IPromotionPlanningService/GetSalePageCandidatesForPromo/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
bool No
https://api.steampowered.com/IPromotionPlanningService/GetUpcomingScheduledDiscounts/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
uint32 No
uint32 No
bool No
bool No
https://api.steampowered.com/IPromotionPlanningService/MarkLocalizationAssetComplete/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
fixed64 No
bool No
UNDOCUMENTEDSearchPlan
https://api.steampowered.com/IPromotionPlanningService/SearchPlan/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
string No
UNDOCUMENTEDPOSTSendNotification
https://api.steampowered.com/IPromotionPlanningService/SendNotification/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
fixed64 No
int32 Noenum
bool NoIf true, then only contact explicitly added emails to the promotion plan
UNDOCUMENTEDPOSTUpdatePlan
https://api.steampowered.com/IPromotionPlanningService/UpdatePlan/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
CPromotionPlan No
fixed64 No
string No
string No
string No
uint32 No
uint32 No
uint32 No
string No
uint32 No
string No
string No
string No
string No
fixed64 No
UNDOCUMENTEDPOSTUpdatePlanInputData
https://api.steampowered.com/IPromotionPlanningService/UpdatePlanInputData/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
CPromotionPlan No
fixed64 No
string No
string No
string No
uint32 No
uint32 No
uint32 No
string No
uint32 No
string No
string No
string No
string No
fixed64 No
UNDOCUMENTEDPOSTUpdatePlanPartnerInfo
https://api.steampowered.com/IPromotionPlanningService/UpdatePlanPartnerInfo/v1/
NameValueTypeRequiredDescription
click to setstring Yes Access key
CPromotionPlan No
fixed64 No
string No
string No
string No
uint32 No
uint32 No
uint32 No
string No
uint32 No
string No
string No
string No
string No
fixed64 No