diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44ac3bf6a..6acd64e54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Release (2025-XX-XX)
+- `ske`: [v0.26.0](services/ske/CHANGELOG.md#v0260)
+  - Add `required:"true"` tags to model structs
+
 ## Release (2025-06-16)
 - `iaas`: 
   - [v0.24.1](services/iaas/CHANGELOG.md#v0241-2025-06-12)
diff --git a/services/ske/CHANGELOG.md b/services/ske/CHANGELOG.md
index 6359da155..52383802d 100644
--- a/services/ske/CHANGELOG.md
+++ b/services/ske/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v0.26.0 
+- Add `required:"true"` tags to model structs
+
 ## v0.25.0 (2025-06-10)
 - **Feature:** Add new field `PodAddressRanges` to `ClusterStatus`
 
diff --git a/services/ske/model_acl.go b/services/ske/model_acl.go
index bf9bfc252..e12f9084c 100644
--- a/services/ske/model_acl.go
+++ b/services/ske/model_acl.go
@@ -61,10 +61,10 @@ func setACLgetEnabledAttributeType(arg *ACLgetEnabledAttributeType, val ACLgetEn
 type ACL struct {
 	// Array of CIDRs to allow access to the kubernetes API.
 	// REQUIRED
-	AllowedCidrs ACLGetAllowedCidrsAttributeType `json:"allowedCidrs"`
+	AllowedCidrs ACLGetAllowedCidrsAttributeType `json:"allowedCidrs" required:"true"`
 	// Enables the acl extension.
 	// REQUIRED
-	Enabled ACLgetEnabledAttributeType `json:"enabled"`
+	Enabled ACLgetEnabledAttributeType `json:"enabled" required:"true"`
 }
 
 type _ACL ACL
diff --git a/services/ske/model_argus.go b/services/ske/model_argus.go
index e36933a6a..375bd71a1 100644
--- a/services/ske/model_argus.go
+++ b/services/ske/model_argus.go
@@ -62,10 +62,10 @@ func setArgusgetEnabledAttributeType(arg *ArgusgetEnabledAttributeType, val Argu
 type Argus struct {
 	// Argus instance ID to choose which Argus instance is used.
 	// REQUIRED
-	ArgusInstanceId ArgusGetArgusInstanceIdAttributeType `json:"argusInstanceId"`
+	ArgusInstanceId ArgusGetArgusInstanceIdAttributeType `json:"argusInstanceId" required:"true"`
 	// Enables the argus extension.
 	// REQUIRED
-	Enabled ArgusgetEnabledAttributeType `json:"enabled"`
+	Enabled ArgusgetEnabledAttributeType `json:"enabled" required:"true"`
 }
 
 type _Argus Argus
diff --git a/services/ske/model_cluster.go b/services/ske/model_cluster.go
index 2a44a7d37..348d161d6 100644
--- a/services/ske/model_cluster.go
+++ b/services/ske/model_cluster.go
@@ -183,12 +183,12 @@ type Cluster struct {
 	Extensions  ClusterGetExtensionsAttributeType  `json:"extensions,omitempty"`
 	Hibernation ClusterGetHibernationAttributeType `json:"hibernation,omitempty"`
 	// REQUIRED
-	Kubernetes  ClusterGetKubernetesAttributeType  `json:"kubernetes"`
+	Kubernetes  ClusterGetKubernetesAttributeType  `json:"kubernetes" required:"true"`
 	Maintenance ClusterGetMaintenanceAttributeType `json:"maintenance,omitempty"`
 	Name        ClusterGetNameAttributeType        `json:"name,omitempty"`
 	Network     ClusterGetNetworkAttributeType     `json:"network,omitempty"`
 	// REQUIRED
-	Nodepools ClusterGetNodepoolsAttributeType `json:"nodepools"`
+	Nodepools ClusterGetNodepoolsAttributeType `json:"nodepools" required:"true"`
 	Status    ClusterGetStatusAttributeType    `json:"status,omitempty"`
 }
 
diff --git a/services/ske/model_create_or_update_cluster_payload.go b/services/ske/model_create_or_update_cluster_payload.go
index 48bea07f7..65ba4eaeb 100644
--- a/services/ske/model_create_or_update_cluster_payload.go
+++ b/services/ske/model_create_or_update_cluster_payload.go
@@ -162,11 +162,11 @@ type CreateOrUpdateClusterPayload struct {
 	Extensions  CreateOrUpdateClusterPayloadGetExtensionsAttributeType  `json:"extensions,omitempty"`
 	Hibernation CreateOrUpdateClusterPayloadGetHibernationAttributeType `json:"hibernation,omitempty"`
 	// REQUIRED
-	Kubernetes  CreateOrUpdateClusterPayloadGetKubernetesAttributeType  `json:"kubernetes"`
+	Kubernetes  CreateOrUpdateClusterPayloadGetKubernetesAttributeType  `json:"kubernetes" required:"true"`
 	Maintenance CreateOrUpdateClusterPayloadGetMaintenanceAttributeType `json:"maintenance,omitempty"`
 	Network     CreateOrUpdateClusterPayloadGetNetworkAttributeType     `json:"network,omitempty"`
 	// REQUIRED
-	Nodepools CreateOrUpdateClusterPayloadGetNodepoolsAttributeType `json:"nodepools"`
+	Nodepools CreateOrUpdateClusterPayloadGetNodepoolsAttributeType `json:"nodepools" required:"true"`
 	Status    CreateOrUpdateClusterPayloadGetStatusAttributeType    `json:"status,omitempty"`
 }
 
diff --git a/services/ske/model_dns.go b/services/ske/model_dns.go
index 7958bdab5..2e790634a 100644
--- a/services/ske/model_dns.go
+++ b/services/ske/model_dns.go
@@ -61,7 +61,7 @@ func setDNSGetZonesAttributeType(arg *DNSGetZonesAttributeType, val DNSGetZonesR
 type DNS struct {
 	// Enables the dns extension.
 	// REQUIRED
-	Enabled DNSgetEnabledAttributeType `json:"enabled"`
+	Enabled DNSgetEnabledAttributeType `json:"enabled" required:"true"`
 	// Array of domain filters for externalDNS, e.g., *.runs.onstackit.cloud.
 	Zones DNSGetZonesAttributeType `json:"zones,omitempty"`
 }
diff --git a/services/ske/model_hibernation.go b/services/ske/model_hibernation.go
index bc03772e4..1b9510a6f 100644
--- a/services/ske/model_hibernation.go
+++ b/services/ske/model_hibernation.go
@@ -40,7 +40,7 @@ func setHibernationGetSchedulesAttributeType(arg *HibernationGetSchedulesAttribu
 // Hibernation struct for Hibernation
 type Hibernation struct {
 	// REQUIRED
-	Schedules HibernationGetSchedulesAttributeType `json:"schedules"`
+	Schedules HibernationGetSchedulesAttributeType `json:"schedules" required:"true"`
 }
 
 type _Hibernation Hibernation
diff --git a/services/ske/model_hibernation_schedule.go b/services/ske/model_hibernation_schedule.go
index 6ce023938..54f5df283 100644
--- a/services/ske/model_hibernation_schedule.go
+++ b/services/ske/model_hibernation_schedule.go
@@ -83,9 +83,9 @@ type HibernationScheduleGetTimezoneRetType = string
 // HibernationSchedule struct for HibernationSchedule
 type HibernationSchedule struct {
 	// REQUIRED
-	End HibernationScheduleGetEndAttributeType `json:"end"`
+	End HibernationScheduleGetEndAttributeType `json:"end" required:"true"`
 	// REQUIRED
-	Start    HibernationScheduleGetStartAttributeType    `json:"start"`
+	Start    HibernationScheduleGetStartAttributeType    `json:"start" required:"true"`
 	Timezone HibernationScheduleGetTimezoneAttributeType `json:"timezone,omitempty"`
 }
 
diff --git a/services/ske/model_image.go b/services/ske/model_image.go
index 4fc83b665..343739cb5 100644
--- a/services/ske/model_image.go
+++ b/services/ske/model_image.go
@@ -62,9 +62,9 @@ type ImageGetVersionRetType = string
 // Image For valid names and versions please take a look at [provider-options](#tag/ProviderOptions/operation/SkeService_GetProviderOptions) `machineImages`.
 type Image struct {
 	// REQUIRED
-	Name ImageGetNameAttributeType `json:"name"`
+	Name ImageGetNameAttributeType `json:"name" required:"true"`
 	// REQUIRED
-	Version ImageGetVersionAttributeType `json:"version"`
+	Version ImageGetVersionAttributeType `json:"version" required:"true"`
 }
 
 type _Image Image
diff --git a/services/ske/model_kubernetes.go b/services/ske/model_kubernetes.go
index f82c25b32..2b86b5389 100644
--- a/services/ske/model_kubernetes.go
+++ b/services/ske/model_kubernetes.go
@@ -63,7 +63,7 @@ type Kubernetes struct {
 	// DEPRECATED as of Kubernetes 1.25+ Flag to specify if privileged mode for containers is enabled or not. This should be used with care since it also disables a couple of other features like the use of some volume type (e.g. PVCs). By default this is set to true.
 	AllowPrivilegedContainers KubernetesgetAllowPrivilegedContainersAttributeType `json:"allowPrivilegedContainers,omitempty"`
 	// REQUIRED
-	Version KubernetesGetVersionAttributeType `json:"version"`
+	Version KubernetesGetVersionAttributeType `json:"version" required:"true"`
 }
 
 type _Kubernetes Kubernetes
diff --git a/services/ske/model_machine.go b/services/ske/model_machine.go
index d51fcebfd..b308bbc44 100644
--- a/services/ske/model_machine.go
+++ b/services/ske/model_machine.go
@@ -61,10 +61,10 @@ type MachineGetTypeRetType = string
 // Machine struct for Machine
 type Machine struct {
 	// REQUIRED
-	Image MachineGetImageAttributeType `json:"image"`
+	Image MachineGetImageAttributeType `json:"image" required:"true"`
 	// For valid types please take a look at [provider-options](#tag/ProviderOptions/operation/SkeService_GetProviderOptions) `machineTypes`.
 	// REQUIRED
-	Type MachineGetTypeAttributeType `json:"type"`
+	Type MachineGetTypeAttributeType `json:"type" required:"true"`
 }
 
 type _Machine Machine
diff --git a/services/ske/model_maintenance.go b/services/ske/model_maintenance.go
index a7fd55558..001422343 100644
--- a/services/ske/model_maintenance.go
+++ b/services/ske/model_maintenance.go
@@ -60,9 +60,9 @@ func setMaintenanceGetTimeWindowAttributeType(arg *MaintenanceGetTimeWindowAttri
 // Maintenance struct for Maintenance
 type Maintenance struct {
 	// REQUIRED
-	AutoUpdate MaintenanceGetAutoUpdateAttributeType `json:"autoUpdate"`
+	AutoUpdate MaintenanceGetAutoUpdateAttributeType `json:"autoUpdate" required:"true"`
 	// REQUIRED
-	TimeWindow MaintenanceGetTimeWindowAttributeType `json:"timeWindow"`
+	TimeWindow MaintenanceGetTimeWindowAttributeType `json:"timeWindow" required:"true"`
 }
 
 type _Maintenance Maintenance
diff --git a/services/ske/model_nodepool.go b/services/ske/model_nodepool.go
index a31c30a06..d9d5858a6 100644
--- a/services/ske/model_nodepool.go
+++ b/services/ske/model_nodepool.go
@@ -263,11 +263,11 @@ type Nodepool struct {
 	// This needs to be true for at least one node pool.
 	AllowSystemComponents NodepoolgetAllowSystemComponentsAttributeType `json:"allowSystemComponents,omitempty"`
 	// REQUIRED
-	AvailabilityZones NodepoolGetAvailabilityZonesAttributeType `json:"availabilityZones"`
+	AvailabilityZones NodepoolGetAvailabilityZonesAttributeType `json:"availabilityZones" required:"true"`
 	Cri               NodepoolGetCriAttributeType               `json:"cri,omitempty"`
 	Labels            NodepoolGetLabelsAttributeType            `json:"labels,omitempty"`
 	// REQUIRED
-	Machine NodepoolGetMachineAttributeType `json:"machine"`
+	Machine NodepoolGetMachineAttributeType `json:"machine" required:"true"`
 	// Can be cast to int32 without loss of precision.
 	MaxSurge NodepoolGetMaxSurgeAttributeType `json:"maxSurge,omitempty"`
 	// Can be cast to int32 without loss of precision.
@@ -275,17 +275,17 @@ type Nodepool struct {
 	// Maximum number of nodes in the pool. During runtime, the cluster will never scale beyond 1000 nodes, even if the total maximum would allow for a larger cluster.
 	// Can be cast to int32 without loss of precision.
 	// REQUIRED
-	Maximum NodepoolGetMaximumAttributeType `json:"maximum"`
+	Maximum NodepoolGetMaximumAttributeType `json:"maximum" required:"true"`
 	// Minimum number of nodes in the pool. The sum of all minima must not exceed 1000.
 	// Can be cast to int32 without loss of precision.
 	// REQUIRED
-	Minimum NodepoolGetMinimumAttributeType `json:"minimum"`
+	Minimum NodepoolGetMinimumAttributeType `json:"minimum" required:"true"`
 	// Maximum 15 chars
 	// REQUIRED
-	Name   NodepoolGetNameAttributeType   `json:"name"`
+	Name   NodepoolGetNameAttributeType   `json:"name" required:"true"`
 	Taints NodepoolGetTaintsAttributeType `json:"taints,omitempty"`
 	// REQUIRED
-	Volume NodepoolGetVolumeAttributeType `json:"volume"`
+	Volume NodepoolGetVolumeAttributeType `json:"volume" required:"true"`
 }
 
 type _Nodepool Nodepool
diff --git a/services/ske/model_taint.go b/services/ske/model_taint.go
index aaaf8eba8..a91c08d63 100644
--- a/services/ske/model_taint.go
+++ b/services/ske/model_taint.go
@@ -189,9 +189,9 @@ type TaintGetValueRetType = string
 // Taint struct for Taint
 type Taint struct {
 	// REQUIRED
-	Effect TaintGetEffectAttributeType `json:"effect"`
+	Effect TaintGetEffectAttributeType `json:"effect" required:"true"`
 	// REQUIRED
-	Key   TaintGetKeyAttributeType   `json:"key"`
+	Key   TaintGetKeyAttributeType   `json:"key" required:"true"`
 	Value TaintGetValueAttributeType `json:"value,omitempty"`
 }
 
diff --git a/services/ske/model_time_window.go b/services/ske/model_time_window.go
index 89b693faa..df318e42e 100644
--- a/services/ske/model_time_window.go
+++ b/services/ske/model_time_window.go
@@ -61,9 +61,9 @@ func setTimeWindowGetStartAttributeType(arg *TimeWindowGetStartAttributeType, va
 // TimeWindow struct for TimeWindow
 type TimeWindow struct {
 	// REQUIRED
-	End TimeWindowGetEndAttributeType `json:"end"`
+	End TimeWindowGetEndAttributeType `json:"end" required:"true"`
 	// REQUIRED
-	Start TimeWindowGetStartAttributeType `json:"start"`
+	Start TimeWindowGetStartAttributeType `json:"start" required:"true"`
 }
 
 type _TimeWindow TimeWindow
diff --git a/services/ske/model_volume.go b/services/ske/model_volume.go
index 5b5e9e6a5..753ae5c87 100644
--- a/services/ske/model_volume.go
+++ b/services/ske/model_volume.go
@@ -62,7 +62,7 @@ type VolumeGetTypeRetType = string
 type Volume struct {
 	// Can be cast to int32 without loss of precision.
 	// REQUIRED
-	Size VolumeGetSizeAttributeType `json:"size"`
+	Size VolumeGetSizeAttributeType `json:"size" required:"true"`
 	// For valid values please take a look at [provider-options](#tag/ProviderOptions/operation/SkeService_GetProviderOptions) `volumeTypes`.
 	Type VolumeGetTypeAttributeType `json:"type,omitempty"`
 }