在使用RAM账号调用阿里云API前，需要主账号通过创建授权策略对RAM账号进行授权。

可授权的Web应用托管服务接口

下表列举了Web应用托管服务中可授权的API及其描述方式：

API 资源描述
CreateApplication *
DeleteApplication *
DescribeApplications *
UpdateApplication *
CreateStorage *
DescribeStorage *
DescribeCategories *
DescribeStacks *
DeletePkgVersion *
DescribePkgVersions *
CreatePkgVersion *
CreateAppEnv *
DeleteAppEnv *
DescribeAppEnvStatus *
DescribeAppEnvs *
UpdateAppEnv *
TerminateAppEnv *
StopAppEnv *
DescribeAppEnvInstanceHealth *
StartAppEnv *
RestartAppEnv *
DescribeInstanceHealth *
RebuildAppEnv *
GatherAppEnvLog *
GatherAppEnvStats *
DescribeEnvResource *
DescribeGatherLogResult *
DescribeGatherStatsResult *
CreateConfigTemplate *
DeleteConfigTemplate *
DescribeConfigTemplates *
DescribeConfigSettings *
DescribeConfigOptions *
DescribeConfigIndex *
ValidateConfigSetting *
AbortChange *
DeleteChange *
ResumeChange *
PauseChange *
DescribeChange *
DescribeChanges *
DescribeEvents *