diff --git a/packages/clients/src/api/baremetal/v1/marshalling.gen.ts b/packages/clients/src/api/baremetal/v1/marshalling.gen.ts
index 94251d2c3..51be1e8ef 100644
--- a/packages/clients/src/api/baremetal/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/baremetal/v1/marshalling.gen.ts
@@ -580,7 +580,7 @@ export const marshalRebootServerRequest = (
   request: RebootServerRequest,
   defaults: DefaultValues,
 ): Record<string, unknown> => ({
-  boot_type: request.bootType,
+  boot_type: request.bootType ?? 'unknown_boot_type',
 })
 
 export const marshalStartBMCAccessRequest = (
@@ -594,7 +594,7 @@ export const marshalStartServerRequest = (
   request: StartServerRequest,
   defaults: DefaultValues,
 ): Record<string, unknown> => ({
-  boot_type: request.bootType,
+  boot_type: request.bootType ?? 'unknown_boot_type',
 })
 
 export const marshalUpdateIPRequest = (
diff --git a/packages/clients/src/api/baremetal/v1/types.gen.ts b/packages/clients/src/api/baremetal/v1/types.gen.ts
index 2fa36b5d6..3211b9677 100644
--- a/packages/clients/src/api/baremetal/v1/types.gen.ts
+++ b/packages/clients/src/api/baremetal/v1/types.gen.ts
@@ -597,7 +597,7 @@ export type RebootServerRequest = {
   /** ID of the server to reboot */
   serverId: string
   /** The type of boot */
-  bootType: ServerBootType
+  bootType?: ServerBootType
 }
 
 export type StartServerRequest = {
@@ -606,7 +606,7 @@ export type StartServerRequest = {
   /** ID of the server to start */
   serverId: string
   /** The type of boot */
-  bootType: ServerBootType
+  bootType?: ServerBootType
 }
 
 export type StopServerRequest = {
diff --git a/packages/clients/src/api/container/v1beta1/marshalling.gen.ts b/packages/clients/src/api/container/v1beta1/marshalling.gen.ts
index f86de138a..e9563f3a7 100644
--- a/packages/clients/src/api/container/v1beta1/marshalling.gen.ts
+++ b/packages/clients/src/api/container/v1beta1/marshalling.gen.ts
@@ -266,7 +266,7 @@ export const marshalCreateContainerRequest = (
 ): Record<string, unknown> => ({
   description: request.description,
   environment_variables: request.environmentVariables,
-  http_option: request.httpOption,
+  http_option: request.httpOption ?? 'unknown_http_option',
   max_concurrency: request.maxConcurrency,
   max_scale: request.maxScale,
   memory_limit: request.memoryLimit,
@@ -274,8 +274,8 @@ export const marshalCreateContainerRequest = (
   name: request.name || randomName('ctnr'),
   namespace_id: request.namespaceId,
   port: request.port,
-  privacy: request.privacy,
-  protocol: request.protocol,
+  privacy: request.privacy ?? 'unknown_privacy',
+  protocol: request.protocol ?? 'unknown_protocol',
   registry_image: request.registryImage,
   secret_environment_variables: request.secretEnvironmentVariables
     ? request.secretEnvironmentVariables.map(elt =>
@@ -342,14 +342,14 @@ export const marshalUpdateContainerRequest = (
 ): Record<string, unknown> => ({
   description: request.description,
   environment_variables: request.environmentVariables,
-  http_option: request.httpOption,
+  http_option: request.httpOption ?? 'unknown_http_option',
   max_concurrency: request.maxConcurrency,
   max_scale: request.maxScale,
   memory_limit: request.memoryLimit,
   min_scale: request.minScale,
   port: request.port,
-  privacy: request.privacy,
-  protocol: request.protocol,
+  privacy: request.privacy ?? 'unknown_privacy',
+  protocol: request.protocol ?? 'unknown_protocol',
   redeploy: request.redeploy,
   registry_image: request.registryImage,
   secret_environment_variables: request.secretEnvironmentVariables
diff --git a/packages/clients/src/api/container/v1beta1/types.gen.ts b/packages/clients/src/api/container/v1beta1/types.gen.ts
index 49361165c..abd1bec7b 100644
--- a/packages/clients/src/api/container/v1beta1/types.gen.ts
+++ b/packages/clients/src/api/container/v1beta1/types.gen.ts
@@ -293,11 +293,11 @@ export type CreateContainerRequest = {
   maxScale?: number
   memoryLimit?: number
   timeout?: string
-  privacy: ContainerPrivacy
+  privacy?: ContainerPrivacy
   description?: string
   registryImage?: string
   maxConcurrency?: number
-  protocol: ContainerProtocol
+  protocol?: ContainerProtocol
   port?: number
   secretEnvironmentVariables?: Array<Secret>
   /**
@@ -307,7 +307,7 @@ export type CreateContainerRequest = {
    *   to use HTTPS.
    * - Enabled: Serve both HTTP and HTTPS traffic.
    */
-  httpOption: ContainerHttpOption
+  httpOption?: ContainerHttpOption
 }
 
 export type UpdateContainerRequest = {
@@ -320,11 +320,11 @@ export type UpdateContainerRequest = {
   memoryLimit?: number
   timeout?: string
   redeploy?: boolean
-  privacy: ContainerPrivacy
+  privacy?: ContainerPrivacy
   description?: string
   registryImage?: string
   maxConcurrency?: number
-  protocol: ContainerProtocol
+  protocol?: ContainerProtocol
   port?: number
   secretEnvironmentVariables?: Array<Secret>
   /**
@@ -334,7 +334,7 @@ export type UpdateContainerRequest = {
    *   to use HTTPS.
    * - Enabled: Serve both HTTP and HTTPS traffic.
    */
-  httpOption: ContainerHttpOption
+  httpOption?: ContainerHttpOption
 }
 
 export type DeleteContainerRequest = {
diff --git a/packages/clients/src/api/domain/v2beta1/api.gen.ts b/packages/clients/src/api/domain/v2beta1/api.gen.ts
index 0b0b8eda1..563c58cd6 100644
--- a/packages/clients/src/api/domain/v2beta1/api.gen.ts
+++ b/packages/clients/src/api/domain/v2beta1/api.gen.ts
@@ -445,7 +445,10 @@ export class DomainV2Beta1GenAPI extends API {
           'dnsZone',
           request.dnsZone,
         )}/raw`,
-        urlParams: urlParams(['format', request.format]),
+        urlParams: urlParams([
+          'format',
+          request.format ?? 'unknown_raw_format',
+        ]),
       },
       unmarshalScwFile,
     )
diff --git a/packages/clients/src/api/domain/v2beta1/marshalling.gen.ts b/packages/clients/src/api/domain/v2beta1/marshalling.gen.ts
index ac81db4dd..c9c3fbeb7 100644
--- a/packages/clients/src/api/domain/v2beta1/marshalling.gen.ts
+++ b/packages/clients/src/api/domain/v2beta1/marshalling.gen.ts
@@ -1947,7 +1947,7 @@ export const marshalRegistrarApiUpdateContactRequest = (
     ? marshalContactExtensionNL(request.extensionNl, defaults)
     : undefined,
   fax_number: request.faxNumber,
-  lang: request.lang,
+  lang: request.lang ?? 'unknown_language_code',
   phone_number: request.phoneNumber,
   questions: request.questions
     ? request.questions.map(elt =>
diff --git a/packages/clients/src/api/domain/v2beta1/types.gen.ts b/packages/clients/src/api/domain/v2beta1/types.gen.ts
index d139d2880..b2385e167 100644
--- a/packages/clients/src/api/domain/v2beta1/types.gen.ts
+++ b/packages/clients/src/api/domain/v2beta1/types.gen.ts
@@ -926,7 +926,7 @@ export type ExportRawDNSZoneRequest = {
   /** The DNS zone to export */
   dnsZone: string
   /** Format for DNS zone */
-  format: RawFormat
+  format?: RawFormat
 }
 
 export type ImportRawDNSZoneRequest = {
@@ -1189,7 +1189,7 @@ export type RegistrarApiUpdateContactRequest = {
   country?: string
   vatIdentificationCode?: string
   companyIdentificationCode?: string
-  lang: LanguageCode
+  lang?: LanguageCode
   resale?: boolean
   /** @deprecated */
   questions?: Array<UpdateContactRequestQuestion>
diff --git a/packages/clients/src/api/function/v1beta1/marshalling.gen.ts b/packages/clients/src/api/function/v1beta1/marshalling.gen.ts
index fcfd58893..2f6e04679 100644
--- a/packages/clients/src/api/function/v1beta1/marshalling.gen.ts
+++ b/packages/clients/src/api/function/v1beta1/marshalling.gen.ts
@@ -655,14 +655,14 @@ export const marshalCreateFunctionRequest = (
   description: request.description,
   environment_variables: request.environmentVariables,
   handler: request.handler,
-  http_option: request.httpOption,
+  http_option: request.httpOption ?? 'unknown_http_option',
   max_scale: request.maxScale,
   memory_limit: request.memoryLimit,
   min_scale: request.minScale,
   name: request.name || randomName('fn'),
   namespace_id: request.namespaceId,
-  privacy: request.privacy,
-  runtime: request.runtime,
+  privacy: request.privacy ?? 'unknown_privacy',
+  runtime: request.runtime ?? 'unknown_runtime',
   secret_environment_variables: request.secretEnvironmentVariables
     ? request.secretEnvironmentVariables.map(elt =>
         marshalSecret(elt, defaults),
@@ -739,7 +739,7 @@ export const marshalCreateTriggerRequest = (
   description: request.description,
   function_id: request.functionId,
   name: request.name,
-  type: request.type,
+  type: request.type ?? 'unknown_trigger_type',
   ...resolveOneOf<unknown>([
     {
       param: 'nats_failure_handling_policy',
@@ -800,13 +800,13 @@ export const marshalUpdateFunctionRequest = (
   description: request.description,
   environment_variables: request.environmentVariables,
   handler: request.handler,
-  http_option: request.httpOption,
+  http_option: request.httpOption ?? 'unknown_http_option',
   max_scale: request.maxScale,
   memory_limit: request.memoryLimit,
   min_scale: request.minScale,
-  privacy: request.privacy,
+  privacy: request.privacy ?? 'unknown_privacy',
   redeploy: request.redeploy,
-  runtime: request.runtime,
+  runtime: request.runtime ?? 'unknown_runtime',
   secret_environment_variables: request.secretEnvironmentVariables
     ? request.secretEnvironmentVariables.map(elt =>
         marshalSecret(elt, defaults),
diff --git a/packages/clients/src/api/function/v1beta1/types.gen.ts b/packages/clients/src/api/function/v1beta1/types.gen.ts
index b126185c0..ebb09eebe 100644
--- a/packages/clients/src/api/function/v1beta1/types.gen.ts
+++ b/packages/clients/src/api/function/v1beta1/types.gen.ts
@@ -511,11 +511,11 @@ export type CreateFunctionRequest = {
   environmentVariables?: Record<string, string>
   minScale?: number
   maxScale?: number
-  runtime: FunctionRuntime
+  runtime?: FunctionRuntime
   memoryLimit?: number
   timeout?: string
   handler?: string
-  privacy: FunctionPrivacy
+  privacy?: FunctionPrivacy
   description?: string
   secretEnvironmentVariables?: Array<Secret>
   /**
@@ -525,7 +525,7 @@ export type CreateFunctionRequest = {
    *   to use HTTPS.
    * - Enabled: Serve both HTTP and HTTPS traffic.
    */
-  httpOption: FunctionHttpOption
+  httpOption?: FunctionHttpOption
 }
 
 export type UpdateFunctionRequest = {
@@ -535,12 +535,12 @@ export type UpdateFunctionRequest = {
   environmentVariables?: Record<string, string>
   minScale?: number
   maxScale?: number
-  runtime: FunctionRuntime
+  runtime?: FunctionRuntime
   memoryLimit?: number
   timeout?: string
   redeploy?: boolean
   handler?: string
-  privacy: FunctionPrivacy
+  privacy?: FunctionPrivacy
   description?: string
   secretEnvironmentVariables?: Array<Secret>
   /**
@@ -550,7 +550,7 @@ export type UpdateFunctionRequest = {
    *   to use HTTPS.
    * - Enabled: Serve both HTTP and HTTPS traffic.
    */
-  httpOption: FunctionHttpOption
+  httpOption?: FunctionHttpOption
 }
 
 export type DeleteFunctionRequest = {
@@ -709,7 +709,7 @@ export type CreateTriggerRequest = {
   name: string
   description: string
   functionId: string
-  type: TriggerType
+  type?: TriggerType
   /**
    * One-of ('failureHandlingPolicy'): at most one of
    * 'natsFailureHandlingPolicy', 'sqsFailureHandlingPolicy' could be set.
diff --git a/packages/clients/src/api/instance/v1/api.gen.ts b/packages/clients/src/api/instance/v1/api.gen.ts
index f681cb8c2..7ee4bd39c 100644
--- a/packages/clients/src/api/instance/v1/api.gen.ts
+++ b/packages/clients/src/api/instance/v1/api.gen.ts
@@ -637,7 +637,7 @@ export class InstanceV1GenAPI extends API {
    * @param request - The request {@link CreateSnapshotRequest}
    * @returns A Promise of CreateSnapshotResponse
    */
-  createSnapshot = (request: Readonly<CreateSnapshotRequest>) =>
+  createSnapshot = (request: Readonly<CreateSnapshotRequest> = {}) =>
     this.client.fetch<CreateSnapshotResponse>(
       {
         body: JSON.stringify(
@@ -770,7 +770,7 @@ export class InstanceV1GenAPI extends API {
    * @param request - The request {@link CreateVolumeRequest}
    * @returns A Promise of CreateVolumeResponse
    */
-  createVolume = (request: Readonly<CreateVolumeRequest>) =>
+  createVolume = (request: Readonly<CreateVolumeRequest> = {}) =>
     this.client.fetch<CreateVolumeResponse>(
       {
         body: JSON.stringify(
@@ -1185,7 +1185,9 @@ export class InstanceV1GenAPI extends API {
    * @param request - The request {@link CreatePlacementGroupRequest}
    * @returns A Promise of CreatePlacementGroupResponse
    */
-  createPlacementGroup = (request: Readonly<CreatePlacementGroupRequest>) =>
+  createPlacementGroup = (
+    request: Readonly<CreatePlacementGroupRequest> = {},
+  ) =>
     this.client.fetch<CreatePlacementGroupResponse>(
       {
         body: JSON.stringify(
diff --git a/packages/clients/src/api/instance/v1/marshalling.gen.ts b/packages/clients/src/api/instance/v1/marshalling.gen.ts
index 3b0b07934..8a0024511 100644
--- a/packages/clients/src/api/instance/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/instance/v1/marshalling.gen.ts
@@ -1662,8 +1662,8 @@ export const marshalCreatePlacementGroupRequest = (
   defaults: DefaultValues,
 ): Record<string, unknown> => ({
   name: request.name || randomName('pg'),
-  policy_mode: request.policyMode,
-  policy_type: request.policyType,
+  policy_mode: request.policyMode ?? 'optional',
+  policy_type: request.policyType ?? 'max_availability',
   tags: request.tags,
   ...resolveOneOf([
     {
@@ -1692,9 +1692,9 @@ export const marshalCreateSecurityGroupRequest = (
 ): Record<string, unknown> => ({
   description: request.description,
   enable_default_security: request.enableDefaultSecurity,
-  inbound_default_policy: request.inboundDefaultPolicy,
+  inbound_default_policy: request.inboundDefaultPolicy ?? 'accept',
   name: request.name || randomName('sg'),
-  outbound_default_policy: request.outboundDefaultPolicy,
+  outbound_default_policy: request.outboundDefaultPolicy ?? 'accept',
   stateful: request.stateful,
   tags: request.tags,
   ...resolveOneOf([
@@ -1783,7 +1783,7 @@ export const marshalCreateSnapshotRequest = (
   size: request.size,
   tags: request.tags,
   volume_id: request.volumeId,
-  volume_type: request.volumeType,
+  volume_type: request.volumeType ?? 'unknown_volume_type',
   ...resolveOneOf([
     {
       default: defaults.defaultProjectId,
@@ -1804,7 +1804,7 @@ export const marshalCreateVolumeRequest = (
 ): Record<string, unknown> => ({
   name: request.name || randomName('vol'),
   tags: request.tags,
-  volume_type: request.volumeType,
+  volume_type: request.volumeType ?? 'l_ssd',
   ...resolveOneOf([
     {
       default: defaults.defaultProjectId,
@@ -1845,7 +1845,7 @@ export const marshalServerActionRequest = (
   request: ServerActionRequest,
   defaults: DefaultValues,
 ): Record<string, unknown> => ({
-  action: request.action,
+  action: request.action ?? 'poweron',
   name: request.name,
   volumes: request.volumes
     ? Object.entries(request.volumes).reduce(
diff --git a/packages/clients/src/api/instance/v1/types.gen.ts b/packages/clients/src/api/instance/v1/types.gen.ts
index 3dc0fd973..d5a2618ea 100644
--- a/packages/clients/src/api/instance/v1/types.gen.ts
+++ b/packages/clients/src/api/instance/v1/types.gen.ts
@@ -984,7 +984,7 @@ export type ServerActionRequest = {
   /** UUID of the server */
   serverId: string
   /** The action to perform on the server */
-  action: ServerAction
+  action?: ServerAction
   /**
    * The name of the backup you want to create. This field should only be
    * specified when performing a backup action.
@@ -1111,7 +1111,7 @@ export type CreateSnapshotRequest = {
    * Overrides the volume_type of the snapshot. If omitted, the volume type of
    * the original volume will be used.
    */
-  volumeType: SnapshotVolumeType
+  volumeType?: SnapshotVolumeType
   /** Bucket name for snapshot imports */
   bucket?: string
   /** Object key for snapshot imports */
@@ -1192,7 +1192,7 @@ export type CreateVolumeRequest = {
   /** The volume tags */
   tags?: Array<string>
   /** The volume type */
-  volumeType: VolumeVolumeType
+  volumeType?: VolumeVolumeType
   /**
    * The volume disk size, must be a multiple of 512.
    *
@@ -1310,9 +1310,9 @@ export type CreateSecurityGroupRequest = {
   /** Whether the security group is stateful or not */
   stateful: boolean
   /** Default policy for inbound rules */
-  inboundDefaultPolicy: SecurityGroupPolicy
+  inboundDefaultPolicy?: SecurityGroupPolicy
   /** Default policy for outbound rules */
-  outboundDefaultPolicy: SecurityGroupPolicy
+  outboundDefaultPolicy?: SecurityGroupPolicy
   /** True to block SMTP on IPv4 and IPv6 */
   enableDefaultSecurity?: boolean
 }
@@ -1440,9 +1440,9 @@ export type CreatePlacementGroupRequest = {
   /** The tags of the placement group */
   tags?: Array<string>
   /** The operating mode of the placement group */
-  policyMode: PlacementGroupPolicyMode
+  policyMode?: PlacementGroupPolicyMode
   /** The policy type of the placement group */
-  policyType: PlacementGroupPolicyType
+  policyType?: PlacementGroupPolicyType
 }
 
 export type GetPlacementGroupRequest = {
@@ -1458,8 +1458,8 @@ export type SetPlacementGroupRequest = {
   placementGroupId: string
   name: string
   organization?: string
-  policyMode: PlacementGroupPolicyMode
-  policyType: PlacementGroupPolicyType
+  policyMode?: PlacementGroupPolicyMode
+  policyType?: PlacementGroupPolicyType
   project?: string
   tags?: Array<string>
 }
diff --git a/packages/clients/src/api/instance/v1/types.private.gen.ts b/packages/clients/src/api/instance/v1/types.private.gen.ts
index 0db92a2aa..46dd8b64b 100644
--- a/packages/clients/src/api/instance/v1/types.private.gen.ts
+++ b/packages/clients/src/api/instance/v1/types.private.gen.ts
@@ -137,7 +137,7 @@ export type SetServerRequest = {
   /** The server modification date */
   modificationDate?: Date
   /** The server state */
-  state: ServerState
+  state?: ServerState
   /** The server location */
   location?: ServerLocation
   /** The server IPv6 address */
@@ -145,7 +145,7 @@ export type SetServerRequest = {
   /** The server bootscript */
   bootscript?: Bootscript
   /** The server boot type */
-  bootType: BootType
+  bootType?: BootType
   /** The server volumes */
   volumes?: Record<string, Volume>
   /** The server security group */
@@ -155,7 +155,7 @@ export type SetServerRequest = {
   /** The server state_detail */
   stateDetail: string
   /** The server arch */
-  arch: Arch
+  arch?: Arch
   /** The server placement group */
   placementGroup?: PlacementGroup
   /** The server private NICs */
@@ -189,7 +189,7 @@ export type SetImageRequest = {
   zone?: Zone
   id: string
   name: string
-  arch: Arch
+  arch?: Arch
   creationDate?: Date
   modificationDate?: Date
   defaultBootscript?: Bootscript
@@ -198,7 +198,7 @@ export type SetImageRequest = {
   organization?: string
   public: boolean
   rootVolume?: VolumeSummary
-  state: ImageState
+  state?: ImageState
   project?: string
   tags?: Array<string>
 }
@@ -210,9 +210,9 @@ export type SetSnapshotRequest = {
   id: string
   name: string
   organization?: string
-  volumeType: VolumeVolumeType
+  volumeType?: VolumeVolumeType
   size: number
-  state: SnapshotState
+  state?: SnapshotState
   baseVolume?: SnapshotBaseVolume
   creationDate?: Date
   modificationDate?: Date
@@ -238,9 +238,9 @@ export type SetSecurityGroupRequest = {
   /** True to block SMTP on IPv4 and IPv6 */
   enableDefaultSecurity: boolean
   /** The default inbound policy */
-  inboundDefaultPolicy: SecurityGroupPolicy
+  inboundDefaultPolicy?: SecurityGroupPolicy
   /** The default outbound policy */
-  outboundDefaultPolicy: SecurityGroupPolicy
+  outboundDefaultPolicy?: SecurityGroupPolicy
   /** The security groups organization ID */
   organization?: string
   /** The security group project ID */
@@ -261,9 +261,9 @@ export type SetSecurityGroupRuleRequest = {
   securityGroupId: string
   securityGroupRuleId: string
   id: string
-  protocol: SecurityGroupRuleProtocol
-  direction: SecurityGroupRuleDirection
-  action: SecurityGroupRuleAction
+  protocol?: SecurityGroupRuleProtocol
+  direction?: SecurityGroupRuleDirection
+  action?: SecurityGroupRuleAction
   ipRange: string
   destPortFrom?: number
   destPortTo?: number
diff --git a/packages/clients/src/api/iot/v1/marshalling.gen.ts b/packages/clients/src/api/iot/v1/marshalling.gen.ts
index 810744bb1..6eb283dbd 100644
--- a/packages/clients/src/api/iot/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/iot/v1/marshalling.gen.ts
@@ -685,7 +685,7 @@ export const marshalUpdateHubRequest = (
   enable_device_auto_provisioning: request.enableDeviceAutoProvisioning,
   events_topic_prefix: request.eventsTopicPrefix,
   name: request.name,
-  product_plan: request.productPlan,
+  product_plan: request.productPlan ?? 'plan_unknown',
   ...resolveOneOf([
     {
       param: 'twins_graphite_config',
diff --git a/packages/clients/src/api/iot/v1/types.gen.ts b/packages/clients/src/api/iot/v1/types.gen.ts
index ecb567707..d7735c10d 100644
--- a/packages/clients/src/api/iot/v1/types.gen.ts
+++ b/packages/clients/src/api/iot/v1/types.gen.ts
@@ -548,7 +548,7 @@ export type UpdateHubRequest = {
   /** Hub name (up to 255 characters) */
   name?: string
   /** Hub feature set */
-  productPlan: HubProductPlan
+  productPlan?: HubProductPlan
   /** Disable Hub events */
   disableEvents?: boolean
   /** Hub events topic prefix */
diff --git a/packages/clients/src/api/k8s/v1/marshalling.gen.ts b/packages/clients/src/api/k8s/v1/marshalling.gen.ts
index 9c0a59b48..cc0fd9c4c 100644
--- a/packages/clients/src/api/k8s/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/k8s/v1/marshalling.gen.ts
@@ -494,7 +494,7 @@ export const marshalCreatePoolRequest = (
 ): Record<string, unknown> => ({
   autohealing: request.autohealing,
   autoscaling: request.autoscaling,
-  container_runtime: request.containerRuntime,
+  container_runtime: request.containerRuntime ?? 'unknown_runtime',
   kubelet_args: request.kubeletArgs,
   max_size: request.maxSize,
   min_size: request.minSize,
@@ -502,7 +502,7 @@ export const marshalCreatePoolRequest = (
   node_type: request.nodeType,
   placement_group_id: request.placementGroupId,
   root_volume_size: request.rootVolumeSize,
-  root_volume_type: request.rootVolumeType,
+  root_volume_type: request.rootVolumeType ?? 'default_volume_type',
   size: request.size,
   tags: request.tags,
   upgrade_policy: request.upgradePolicy
diff --git a/packages/clients/src/api/k8s/v1/types.gen.ts b/packages/clients/src/api/k8s/v1/types.gen.ts
index 86656af73..9d1f59e40 100644
--- a/packages/clients/src/api/k8s/v1/types.gen.ts
+++ b/packages/clients/src/api/k8s/v1/types.gen.ts
@@ -926,7 +926,7 @@ export type CreatePoolRequest = {
    * The customization of the container runtime is available for each pool. Note
    * that `docker` is deprecated since 1.20 and will be removed in 1.24.
    */
-  containerRuntime: Runtime
+  containerRuntime?: Runtime
   /** The enablement of the autohealing feature for the pool */
   autohealing: boolean
   /** The tags associated with the pool */
@@ -949,7 +949,7 @@ export type CreatePoolRequest = {
    * - `b_ssd` is a remote block storage: your system is stored on a centralised
    *   and resilient cluster.
    */
-  rootVolumeType: PoolVolumeType
+  rootVolumeType?: PoolVolumeType
   /** The system volume disk size */
   rootVolumeSize?: number
 }
diff --git a/packages/clients/src/api/lb/v1/marshalling.gen.ts b/packages/clients/src/api/lb/v1/marshalling.gen.ts
index 319c7b69a..5dae7dc41 100644
--- a/packages/clients/src/api/lb/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/lb/v1/marshalling.gen.ts
@@ -966,8 +966,9 @@ export const marshalCreateBackendRequest = (
   health_check: marshalHealthCheck(request.healthCheck, defaults),
   ignore_ssl_server_verify: request.ignoreSslServerVerify,
   name: request.name || randomName('lbb'),
-  on_marked_down_action: request.onMarkedDownAction,
-  proxy_protocol: request.proxyProtocol,
+  on_marked_down_action:
+    request.onMarkedDownAction ?? 'on_marked_down_action_none',
+  proxy_protocol: request.proxyProtocol ?? 'proxy_protocol_unknown',
   send_proxy_v2: request.sendProxyV2,
   server_ip: request.serverIp,
   ssl_bridging: request.sslBridging,
@@ -1047,7 +1048,8 @@ export const marshalCreateLbRequest = (
   description: request.description,
   ip_id: request.ipId,
   name: request.name || randomName('lb'),
-  ssl_compatibility_level: request.sslCompatibilityLevel,
+  ssl_compatibility_level:
+    request.sslCompatibilityLevel ?? 'ssl_compatibility_level_unknown',
   tags: request.tags,
   type: request.type,
   ...resolveOneOf([
@@ -1154,8 +1156,9 @@ export const marshalUpdateBackendRequest = (
   forward_protocol: request.forwardProtocol,
   ignore_ssl_server_verify: request.ignoreSslServerVerify,
   name: request.name,
-  on_marked_down_action: request.onMarkedDownAction,
-  proxy_protocol: request.proxyProtocol,
+  on_marked_down_action:
+    request.onMarkedDownAction ?? 'on_marked_down_action_none',
+  proxy_protocol: request.proxyProtocol ?? 'proxy_protocol_unknown',
   send_proxy_v2: request.sendProxyV2,
   ssl_bridging: request.sslBridging,
   sticky_sessions: request.stickySessions,
@@ -1253,7 +1256,8 @@ export const marshalUpdateLbRequest = (
 ): Record<string, unknown> => ({
   description: request.description,
   name: request.name,
-  ssl_compatibility_level: request.sslCompatibilityLevel,
+  ssl_compatibility_level:
+    request.sslCompatibilityLevel ?? 'ssl_compatibility_level_unknown',
   tags: request.tags,
 })
 
@@ -1334,8 +1338,9 @@ export const marshalZonedApiCreateBackendRequest = (
   health_check: marshalHealthCheck(request.healthCheck, defaults),
   ignore_ssl_server_verify: request.ignoreSslServerVerify,
   name: request.name || randomName('lbb'),
-  on_marked_down_action: request.onMarkedDownAction,
-  proxy_protocol: request.proxyProtocol,
+  on_marked_down_action:
+    request.onMarkedDownAction ?? 'on_marked_down_action_none',
+  proxy_protocol: request.proxyProtocol ?? 'proxy_protocol_unknown',
   send_proxy_v2: request.sendProxyV2,
   server_ip: request.serverIp,
   ssl_bridging: request.sslBridging,
@@ -1415,7 +1420,8 @@ export const marshalZonedApiCreateLbRequest = (
   description: request.description,
   ip_id: request.ipId,
   name: request.name || randomName('lb'),
-  ssl_compatibility_level: request.sslCompatibilityLevel,
+  ssl_compatibility_level:
+    request.sslCompatibilityLevel ?? 'ssl_compatibility_level_unknown',
   tags: request.tags,
   type: request.type,
   ...resolveOneOf([
@@ -1529,8 +1535,9 @@ export const marshalZonedApiUpdateBackendRequest = (
   forward_protocol: request.forwardProtocol,
   ignore_ssl_server_verify: request.ignoreSslServerVerify,
   name: request.name,
-  on_marked_down_action: request.onMarkedDownAction,
-  proxy_protocol: request.proxyProtocol,
+  on_marked_down_action:
+    request.onMarkedDownAction ?? 'on_marked_down_action_none',
+  proxy_protocol: request.proxyProtocol ?? 'proxy_protocol_unknown',
   send_proxy_v2: request.sendProxyV2,
   ssl_bridging: request.sslBridging,
   sticky_sessions: request.stickySessions,
@@ -1628,7 +1635,8 @@ export const marshalZonedApiUpdateLbRequest = (
 ): Record<string, unknown> => ({
   description: request.description,
   name: request.name,
-  ssl_compatibility_level: request.sslCompatibilityLevel,
+  ssl_compatibility_level:
+    request.sslCompatibilityLevel ?? 'ssl_compatibility_level_unknown',
   tags: request.tags,
 })
 
diff --git a/packages/clients/src/api/lb/v1/types.gen.ts b/packages/clients/src/api/lb/v1/types.gen.ts
index 53a9f3347..daa4d65c3 100644
--- a/packages/clients/src/api/lb/v1/types.gen.ts
+++ b/packages/clients/src/api/lb/v1/types.gen.ts
@@ -833,7 +833,7 @@ export type CreateLbRequest = {
    *   as a last resort (Firefox 1, Android 2.3, Chrome 1, Edge 12, IE8 on
    *   Windows XP, Java 6, OpenSSL 0.9.8, Opera 5, and Safari 1).
    */
-  sslCompatibilityLevel: SSLCompatibilityLevel
+  sslCompatibilityLevel?: SSLCompatibilityLevel
 }
 
 export type GetLbRequest = {
@@ -868,7 +868,7 @@ export type UpdateLbRequest = {
    *   as a last resort (Firefox 1, Android 2.3, Chrome 1, Edge 12, IE8 on
    *   Windows XP, Java 6, OpenSSL 0.9.8, Opera 5, and Safari 1).
    */
-  sslCompatibilityLevel: SSLCompatibilityLevel
+  sslCompatibilityLevel?: SSLCompatibilityLevel
 }
 
 export type DeleteLbRequest = {
@@ -999,7 +999,7 @@ export type CreateBackendRequest = {
    */
   timeoutTunnel?: string
   /** Modify what occurs when a backend server is marked down */
-  onMarkedDownAction: OnMarkedDownAction
+  onMarkedDownAction?: OnMarkedDownAction
   /**
    * The PROXY protocol informs the other end about the incoming connection, so
    * that it can know the client's address or the public address it accessed to,
@@ -1011,7 +1011,7 @@ export type CreateBackendRequest = {
    * `proxy_protocol_v2_ssl_cn` Version two with SSL connection and common name
    * information.
    */
-  proxyProtocol: ProxyProtocol
+  proxyProtocol?: ProxyProtocol
   /**
    * Only the host part of the Scaleway S3 bucket website is expected. E.g.
    * `failover-website.s3-website.fr-par.scw.cloud` if your bucket website URL
@@ -1063,7 +1063,7 @@ export type UpdateBackendRequest = {
    */
   timeoutTunnel?: string
   /** Modify what occurs when a backend server is marked down */
-  onMarkedDownAction: OnMarkedDownAction
+  onMarkedDownAction?: OnMarkedDownAction
   /**
    * The PROXY protocol informs the other end about the incoming connection, so
    * that it can know the client's address or the public address it accessed to,
@@ -1075,7 +1075,7 @@ export type UpdateBackendRequest = {
    * `proxy_protocol_v2_ssl_cn` Version two with SSL connection and common name
    * information.
    */
-  proxyProtocol: ProxyProtocol
+  proxyProtocol?: ProxyProtocol
   /**
    * Only the host part of the Scaleway S3 bucket website is expected. Example:
    * `failover-website.s3-website.fr-par.scw.cloud` if your bucket website URL
@@ -1688,7 +1688,7 @@ export type ZonedApiCreateLbRequest = {
    *   as a last resort (Firefox 1, Android 2.3, Chrome 1, Edge 12, IE8 on
    *   Windows XP, Java 6, OpenSSL 0.9.8, Opera 5, and Safari 1).
    */
-  sslCompatibilityLevel: SSLCompatibilityLevel
+  sslCompatibilityLevel?: SSLCompatibilityLevel
 }
 
 export type ZonedApiGetLbRequest = {
@@ -1723,7 +1723,7 @@ export type ZonedApiUpdateLbRequest = {
    *   as a last resort (Firefox 1, Android 2.3, Chrome 1, Edge 12, IE8 on
    *   Windows XP, Java 6, OpenSSL 0.9.8, Opera 5, and Safari 1).
    */
-  sslCompatibilityLevel: SSLCompatibilityLevel
+  sslCompatibilityLevel?: SSLCompatibilityLevel
 }
 
 export type ZonedApiDeleteLbRequest = {
@@ -1854,7 +1854,7 @@ export type ZonedApiCreateBackendRequest = {
    */
   timeoutTunnel?: string
   /** Modify what occurs when a backend server is marked down */
-  onMarkedDownAction: OnMarkedDownAction
+  onMarkedDownAction?: OnMarkedDownAction
   /**
    * The PROXY protocol informs the other end about the incoming connection, so
    * that it can know the client's address or the public address it accessed to,
@@ -1866,7 +1866,7 @@ export type ZonedApiCreateBackendRequest = {
    * `proxy_protocol_v2_ssl_cn` Version two with SSL connection and common name
    * information.
    */
-  proxyProtocol: ProxyProtocol
+  proxyProtocol?: ProxyProtocol
   /**
    * Only the host part of the Scaleway S3 bucket website is expected. E.g.
    * `failover-website.s3-website.fr-par.scw.cloud` if your bucket website URL
@@ -1918,7 +1918,7 @@ export type ZonedApiUpdateBackendRequest = {
    */
   timeoutTunnel?: string
   /** Modify what occurs when a backend server is marked down */
-  onMarkedDownAction: OnMarkedDownAction
+  onMarkedDownAction?: OnMarkedDownAction
   /**
    * The PROXY protocol informs the other end about the incoming connection, so
    * that it can know the client's address or the public address it accessed to,
@@ -1930,7 +1930,7 @@ export type ZonedApiUpdateBackendRequest = {
    * `proxy_protocol_v2_ssl_cn` Version two with SSL connection and common name
    * information.
    */
-  proxyProtocol: ProxyProtocol
+  proxyProtocol?: ProxyProtocol
   /**
    * Only the host part of the Scaleway S3 bucket website is expected. Example:
    * `failover-website.s3-website.fr-par.scw.cloud` if your bucket website URL
diff --git a/packages/clients/src/api/rdb/v1/api.gen.ts b/packages/clients/src/api/rdb/v1/api.gen.ts
index 60d14c2b2..051a428f3 100644
--- a/packages/clients/src/api/rdb/v1/api.gen.ts
+++ b/packages/clients/src/api/rdb/v1/api.gen.ts
@@ -902,7 +902,7 @@ export class RdbV1GenAPI extends API {
           'instanceId',
           request.instanceId,
         )}/logs`,
-        urlParams: urlParams(['order_by', request.orderBy]),
+        urlParams: urlParams(['order_by', request.orderBy ?? 'created_at_asc']),
       },
       unmarshalListInstanceLogsResponse,
     )
diff --git a/packages/clients/src/api/rdb/v1/marshalling.gen.ts b/packages/clients/src/api/rdb/v1/marshalling.gen.ts
index 12b64e64a..654012e1d 100644
--- a/packages/clients/src/api/rdb/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/rdb/v1/marshalling.gen.ts
@@ -966,7 +966,7 @@ export const marshalCreateInstanceRequest = (
   tags: request.tags,
   user_name: request.userName,
   volume_size: request.volumeSize,
-  volume_type: request.volumeType,
+  volume_type: request.volumeType ?? 'lssd',
   ...resolveOneOf([
     {
       default: defaults.defaultProjectId,
@@ -1075,7 +1075,7 @@ export const marshalSetPrivilegeRequest = (
   defaults: DefaultValues,
 ): Record<string, unknown> => ({
   database_name: request.databaseName,
-  permission: request.permission,
+  permission: request.permission ?? 'readonly',
   user_name: request.userName,
 })
 
diff --git a/packages/clients/src/api/rdb/v1/types.gen.ts b/packages/clients/src/api/rdb/v1/types.gen.ts
index 9315b8b90..a2fbcee5e 100644
--- a/packages/clients/src/api/rdb/v1/types.gen.ts
+++ b/packages/clients/src/api/rdb/v1/types.gen.ts
@@ -919,7 +919,7 @@ export type CreateInstanceRequest = {
   /** List of engine settings to be set at database initialisation */
   initSettings?: Array<InstanceSetting>
   /** Type of volume where data are stored (lssd, bssd, ...) */
-  volumeType: VolumeType
+  volumeType?: VolumeType
   /** Volume size when volume_type is not lssd */
   volumeSize: number
   /**
@@ -1066,7 +1066,7 @@ export type ListInstanceLogsRequest = {
   /** UUID of the instance you want logs of */
   instanceId: string
   /** Criteria to use when ordering instance logs listing */
-  orderBy: ListInstanceLogsRequestOrderBy
+  orderBy?: ListInstanceLogsRequestOrderBy
 }
 
 export type GetInstanceLogRequest = {
@@ -1263,7 +1263,7 @@ export type SetPrivilegeRequest = {
   /** Name of the user */
   userName: string
   /** Permission to set (Read, Read/Write, All, Custom) */
-  permission: Permission
+  permission?: Permission
 }
 
 export type ListSnapshotsRequest = {
diff --git a/packages/clients/src/api/registry/v1/marshalling.gen.ts b/packages/clients/src/api/registry/v1/marshalling.gen.ts
index 84a808d6e..4140f7abe 100644
--- a/packages/clients/src/api/registry/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/registry/v1/marshalling.gen.ts
@@ -148,7 +148,7 @@ export const marshalUpdateImageRequest = (
   request: UpdateImageRequest,
   defaults: DefaultValues,
 ): Record<string, unknown> => ({
-  visibility: request.visibility,
+  visibility: request.visibility ?? 'visibility_unknown',
 })
 
 export const marshalUpdateNamespaceRequest = (
diff --git a/packages/clients/src/api/registry/v1/types.gen.ts b/packages/clients/src/api/registry/v1/types.gen.ts
index 5f7c60a65..ae5fa2a31 100644
--- a/packages/clients/src/api/registry/v1/types.gen.ts
+++ b/packages/clients/src/api/registry/v1/types.gen.ts
@@ -260,7 +260,7 @@ export type UpdateImageRequest = {
    * to a `private` image. `inherit` will use the namespace `is_public`
    * parameter
    */
-  visibility: ImageVisibility
+  visibility?: ImageVisibility
 }
 
 export type DeleteImageRequest = {
diff --git a/packages/clients/src/api/test/v1/marshalling.gen.ts b/packages/clients/src/api/test/v1/marshalling.gen.ts
index f3a8ef3ae..3cccd7b2a 100644
--- a/packages/clients/src/api/test/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/test/v1/marshalling.gen.ts
@@ -74,7 +74,7 @@ export const marshalCreateHumanRequest = (
 ): Record<string, unknown> => ({
   altitude_in_meter: request.altitudeInMeter,
   altitude_in_millimeter: request.altitudeInMillimeter,
-  eyes_color: request.eyesColor,
+  eyes_color: request.eyesColor ?? 'unknown',
   fingers_count: request.fingersCount,
   hair_count: request.hairCount,
   height: request.height,
@@ -108,7 +108,7 @@ export const marshalUpdateHumanRequest = (
 ): Record<string, unknown> => ({
   altitude_in_meter: request.altitudeInMeter,
   altitude_in_millimeter: request.altitudeInMillimeter,
-  eyes_color: request.eyesColor,
+  eyes_color: request.eyesColor ?? 'unknown',
   fingers_count: request.fingersCount,
   hair_count: request.hairCount,
   height: request.height,
diff --git a/packages/clients/src/api/test/v1/types.gen.ts b/packages/clients/src/api/test/v1/types.gen.ts
index 8e177aead..f010b0d4d 100644
--- a/packages/clients/src/api/test/v1/types.gen.ts
+++ b/packages/clients/src/api/test/v1/types.gen.ts
@@ -75,7 +75,7 @@ export type CreateHumanRequest = {
   fingersCount: number
   hairCount: number
   isHappy: boolean
-  eyesColor: EyeColors
+  eyesColor?: EyeColors
   /**
    * @deprecated One-of ('projectIdentifier'): at most one of 'organizationId',
    *   'projectId' could be set.
@@ -99,7 +99,7 @@ export type UpdateHumanRequest = {
   fingersCount?: number
   hairCount?: number
   isHappy?: boolean
-  eyesColor: EyeColors
+  eyesColor?: EyeColors
   name?: string
 }
 
diff --git a/packages/clients/src/api/vpcgw/v1/marshalling.gen.ts b/packages/clients/src/api/vpcgw/v1/marshalling.gen.ts
index ef31a8881..636323af2 100644
--- a/packages/clients/src/api/vpcgw/v1/marshalling.gen.ts
+++ b/packages/clients/src/api/vpcgw/v1/marshalling.gen.ts
@@ -417,7 +417,7 @@ export const marshalCreatePATRuleRequest = (
   gateway_id: request.gatewayId,
   private_ip: request.privateIp,
   private_port: request.privatePort,
-  protocol: request.protocol,
+  protocol: request.protocol ?? 'unknown',
   public_port: request.publicPort,
 })
 
@@ -514,6 +514,6 @@ export const marshalUpdatePATRuleRequest = (
 ): Record<string, unknown> => ({
   private_ip: request.privateIp,
   private_port: request.privatePort,
-  protocol: request.protocol,
+  protocol: request.protocol ?? 'unknown',
   public_port: request.publicPort,
 })
diff --git a/packages/clients/src/api/vpcgw/v1/types.gen.ts b/packages/clients/src/api/vpcgw/v1/types.gen.ts
index a2938ece2..fcd1e943c 100644
--- a/packages/clients/src/api/vpcgw/v1/types.gen.ts
+++ b/packages/clients/src/api/vpcgw/v1/types.gen.ts
@@ -837,7 +837,7 @@ export type CreatePATRuleRequest = {
   /** Private port to translate to */
   privatePort: number
   /** Protocol the rule should apply to */
-  protocol: PATRuleProtocol
+  protocol?: PATRuleProtocol
 }
 
 export type UpdatePATRuleRequest = {
@@ -852,7 +852,7 @@ export type UpdatePATRuleRequest = {
   /** Private port to translate to */
   privatePort?: number
   /** Protocol the rule should apply to */
-  protocol: PATRuleProtocol
+  protocol?: PATRuleProtocol
 }
 
 export type SetPATRulesRequest = {