CAST AI Kubernetes Cost Optimization API

openapi: 3.1.0
info:
  title: CAST AI Kubernetes Cost Optimization API
  description: >-
    CAST AI is a Kubernetes cost optimization platform that provides APIs for
    managing clusters, autoscaling, node configuration, workload optimization,
    cost reporting, security insights, and more. The platform continuously
    monitors clusters and optimizes them for cost efficiency using autoscaling,
    spot instance automation, bin packing, and other techniques.
  version: 1.0.0
  contact:
    name: CAST AI
    url: https://cast.ai
  termsOfService: https://cast.ai/terms-of-service
externalDocs:
  description: CAST AI API Documentation
  url: https://docs.cast.ai/docs/api
servers:
  - url: https://api.cast.ai/v1
    description: CAST AI Production API
security:
  - ApiKeyAuth: []
tags:
  - name: AI Enabler
    description: >-
      Manage LLM provider integrations and AI enabler functionality for
      intelligent optimization.
  - name: Allocation Groups
    description: >-
      Manage allocation groups and view efficiency metrics for grouped
      workloads.
  - name: Autoscaler
    description: >-
      Autoscaler operations including triggering rebalancing plans and managing
      cluster scaling behavior.
  - name: Cluster Actions
    description: >-
      Manage cluster controller actions including acknowledging completed
      actions and ingesting logs.
  - name: Cost Reports
    description: >-
      Access cost reporting and efficiency data at the cluster, namespace,
      and workload levels.
  - name: External Clusters
    description: >-
      Manage external Kubernetes clusters connected to CAST AI, including
      listing nodes, draining nodes, and cluster operations.
  - name: Hibernation Schedules
    description: >-
      Create and manage hibernation schedules for clusters to reduce costs
      during off-peak hours.
  - name: Insights
    description: >-
      Access security insights, best practices reports, and container image
      scanning information.
  - name: Inventory
    description: >-
      Manage inventory resources and blacklists for instance types and
      regions.
  - name: Node Configuration
    description: >-
      Manage node configurations for clusters, which define how nodes are
      provisioned and configured.
  - name: Node Templates
    description: >-
      Manage node templates that define instance types, constraints, and
      configuration for autoscaled nodes.
  - name: Operations
    description: >-
      Track and manage long-running operations within CAST AI.
  - name: Policies
    description: >-
      Manage autoscaler policies configuration for clusters, including
      unscheduled pods, node downscaler, and spot instance policies.
  - name: Pricing
    description: >-
      Access pricing information for cloud provider instances and sync
      billing data.
  - name: Scheduled Rebalancing
    description: >-
      Create and manage scheduled rebalancing jobs that periodically optimize
      cluster node allocation.
  - name: Settings
    description: >-
      Manage API key settings and organization-level configuration.
  - name: Workload Optimization
    description: >-
      Manage workload optimization settings, view workload recommendations,
      and configure workload autoscaling.
paths:
  /kubernetes/external-clusters/{clusterId}/nodes:
    get:
      operationId: ExternalClusterAPI_ListNodes
      summary: CAST AI List cluster nodes
      description: Lists the nodes for a cluster.
      tags:
        - External Clusters
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      responses:
        '200':
          description: Successful response with list of nodes.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListNodesResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/external-clusters/{clusterId}/nodes/{nodeId}/drain:
    post:
      operationId: ExternalClusterAPI_DrainNode
      summary: CAST AI Drain cluster node
      description: Drains the specified cluster node.
      tags:
        - External Clusters
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - $ref: '#/components/parameters/NodeId'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DrainNodeRequest'
      responses:
        '200':
          description: Node drain initiated successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DrainNodeResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/external-clusters/{clusterId}/nodes/{nodeId}:
    delete:
      operationId: ExternalClusterAPI_DeleteNode
      summary: CAST AI Delete cluster node
      description: Deletes the specified cluster node.
      tags:
        - External Clusters
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - $ref: '#/components/parameters/NodeId'
      responses:
        '200':
          description: Node deleted successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/policies:
    get:
      operationId: PoliciesAPI_GetClusterPolicies
      summary: CAST AI Get cluster policies
      description: Gets policies configuration for the target cluster.
      tags:
        - Policies
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      responses:
        '200':
          description: Successful response with cluster policies.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ClusterPolicies'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: PoliciesAPI_UpsertClusterPolicies
      summary: CAST AI Upsert cluster policies
      description: Upsert cluster's policies configuration.
      tags:
        - Policies
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ClusterPolicies'
      responses:
        '200':
          description: Policies updated successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ClusterPolicies'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/node-templates:
    get:
      operationId: NodeTemplatesAPI_ListNodeTemplates
      summary: CAST AI List node templates
      description: Lists node templates for the specified cluster.
      tags:
        - Node Templates
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      responses:
        '200':
          description: Successful response with list of node templates.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListNodeTemplatesResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    post:
      operationId: NodeTemplatesAPI_CreateNodeTemplate
      summary: CAST AI Create node template
      description: Creates a new node template for the specified cluster.
      tags:
        - Node Templates
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/NodeTemplate'
      responses:
        '200':
          description: Node template created successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NodeTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/node-templates/{nodeTemplateId}:
    get:
      operationId: NodeTemplatesAPI_GetNodeTemplate
      summary: CAST AI Get node template
      description: Gets a specific node template by ID.
      tags:
        - Node Templates
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - $ref: '#/components/parameters/NodeTemplateId'
      responses:
        '200':
          description: Successful response with node template.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NodeTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: NodeTemplatesAPI_UpdateNodeTemplate
      summary: CAST AI Update node template
      description: Updates an existing node template.
      tags:
        - Node Templates
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - $ref: '#/components/parameters/NodeTemplateId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/NodeTemplate'
      responses:
        '200':
          description: Node template updated successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NodeTemplate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: NodeTemplatesAPI_DeleteNodeTemplate
      summary: CAST AI Delete node template
      description: Deletes the specified node template.
      tags:
        - Node Templates
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - $ref: '#/components/parameters/NodeTemplateId'
      responses:
        '200':
          description: Node template deleted successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/node-configurations:
    get:
      operationId: NodeConfigurationAPI_ListConfigurations
      summary: CAST AI List node configurations
      description: Lists node configurations for the specified cluster.
      tags:
        - Node Configuration
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      responses:
        '200':
          description: Successful response with list of node configurations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListNodeConfigurationsResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    post:
      operationId: NodeConfigurationAPI_CreateConfiguration
      summary: CAST AI Create node configuration
      description: Creates a new node configuration for the specified cluster.
      tags:
        - Node Configuration
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/NodeConfiguration'
      responses:
        '200':
          description: Node configuration created successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NodeConfiguration'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/node-configurations/{configurationId}:
    delete:
      operationId: NodeConfigurationAPI_DeleteConfiguration
      summary: CAST AI Delete node configuration
      description: Deletes node configuration of a specific cluster.
      tags:
        - Node Configuration
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - name: configurationId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Node configuration deleted successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/rebalancing-plans/{rebalancingPlanId}/execute:
    post:
      operationId: AutoscalerAPI_ExecuteRebalancingPlan
      summary: CAST AI Trigger rebalancing plan
      description: Triggers and executes a rebalancing plan for the cluster.
      tags:
        - Autoscaler
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - name: rebalancingPlanId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Rebalancing plan execution triggered successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/actions/{actionId}/ack:
    post:
      operationId: ClusterActionsAPI_AckClusterAction
      summary: CAST AI Acknowledge cluster action
      description: Ack completed cluster action.
      tags:
        - Cluster Actions
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - name: actionId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Action acknowledged successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /kubernetes/clusters/{clusterId}/actions/logs:
    post:
      operationId: ClusterActionsAPI_IngestLogs
      summary: CAST AI Ingest cluster controller logs
      description: Ingest cluster controller logs.
      tags:
        - Cluster Actions
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/IngestLogsRequest'
      responses:
        '200':
          description: Logs ingested successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /workload-autoscaling/clusters/{clusterId}/workloads:
    get:
      operationId: WorkloadOptimizationAPI_ListWorkloads
      summary: CAST AI List workloads
      description: Returns a list of workloads for the given cluster.
      tags:
        - Workload Optimization
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      responses:
        '200':
          description: Successful response with list of workloads.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListWorkloadsResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /workload-autoscaling/clusters/{clusterId}/workloads/{workloadId}:
    get:
      operationId: WorkloadOptimizationAPI_GetWorkload
      summary: CAST AI Get workload
      description: Returns workload details and optimization recommendations.
      tags:
        - Workload Optimization
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - name: workloadId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response with workload details.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Workload'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /workload-autoscaling/agent-statuses:
    get:
      operationId: WorkloadOptimizationAPI_GetOrganizationAgentStatuses
      summary: CAST AI Get agent statuses
      description: >-
        Returns status of workload-autoscaler agents for all clusters in
        an organization.
      tags:
        - Workload Optimization
      responses:
        '200':
          description: Successful response with agent statuses.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AgentStatusesResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /scheduled-rebalancing/schedules:
    post:
      operationId: ScheduledRebalancingAPI_CreateRebalancingSchedule
      summary: CAST AI Create rebalancing schedule
      description: Creates a new scheduled rebalancing job.
      tags:
        - Scheduled Rebalancing
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RebalancingSchedule'
      responses:
        '200':
          description: Schedule created successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RebalancingSchedule'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /scheduled-rebalancing/schedules/{scheduleId}:
    get:
      operationId: ScheduledRebalancingAPI_GetRebalancingSchedule
      summary: CAST AI Get rebalancing schedule
      description: Gets a specific rebalancing schedule by ID.
      tags:
        - Scheduled Rebalancing
      parameters:
        - name: scheduleId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response with schedule details.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RebalancingSchedule'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: ScheduledRebalancingAPI_DeleteRebalancingSchedule
      summary: CAST AI Delete rebalancing schedule
      description: Deletes the specified rebalancing schedule.
      tags:
        - Scheduled Rebalancing
      parameters:
        - name: scheduleId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Schedule deleted successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /operations/{operationId}:
    get:
      operationId: OperationsAPI_GetOperation
      summary: CAST AI Get operation
      description: GetOperation returns the operation object by ID.
      tags:
        - Operations
      parameters:
        - name: operationId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response with operation details.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Operation'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /inventory/blacklist/add:
    post:
      operationId: InventoryBlacklistAPI_AddBlacklist
      summary: CAST AI Add to blacklist
      description: Adds instance types or regions to the inventory blacklist.
      tags:
        - Inventory
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BlacklistRequest'
      responses:
        '200':
          description: Added to blacklist successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
  /pricing/clusters/{clusterId}/nodes/{nodeId}:
    get:
      operationId: PricingAPI_GetNodePricing
      summary: CAST AI Get node pricing
      description: Returns pricing data for a specific node in a cluster.
      tags:
        - Pricing
      parameters:
        - $ref: '#/components/parameters/ClusterId'
        - $ref: '#/components/parameters/NodeId'
      responses:
        '200':
          description: Successful response with pricing data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NodePricing'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /pricing/sync-gcp-billing:
    post:
      operationId: PricingAPI_SyncGCPBillingAPIData
      summary: CAST AI Sync GCP billing data
      description: Sync GCP billing pricing API data.
      tags:
        - Pricing
      responses:
        '200':
          description: GCP billing data synced successfully.
        '401':
          $ref: '#/components/responses/Unauthorized'
  /cost-reports/clusters/{clusterId}/efficiency:
    get:
      operationId: CostReportsAPI_GetClusterEfficiency
      summary: CAST AI Get cluster efficiency
      description: Returns efficiency report data for the specified cluster.
      tags:
        - Cost Reports
      parameters:
        - $ref: '#/components/parameters/ClusterId'
      responses:
        '200':
          description: Successful response with efficiency data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ClusterEfficiency'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /allocation-groups/{allocationGroupId}/workloads/efficiency:
    get:
      operationId: AllocationGroupAPI_GetAllocationGroupWorkloadsEfficiency
      summary: CAST AI Get allocation group workloads efficiency
      description: Gets allocation group efficiency workloads.
      tags:
        - Allocation Groups
      parameters:
        - name: allocationGroupId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response with allocation group efficiency data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AllocationGroupEfficiency'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /security/insights/best-practices/filters:
    get:
      operationId: InsightsAPI_GetBestPracticesReportFilters
      summary: CAST AI Get best practices report filters
      description: >-
        Retrieve a list of possible filters for best practices report.
      tags:
        - Insights
      responses:
        '200':
          description: Successful response with available filters.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BestPracticesFilters'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /security/insights/images/{tagId}/digests:
    get:
      operationId: InsightsAPI_GetContainerImageDigests
      summary: CAST AI Get container image digests
      description: Get container image digests for organization by tag ID.
      tags:
        - Insights
      parameters:
        - name: tagId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response with image digests.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ContainerImageDigests'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /hibernation/schedules:
    post:
      operationId: HibernationSchedulesAPI_CreateHibernationSchedule
      summary: CAST AI Create hibernation schedule
      description: Create a hibernation schedule.
      tags:
        - Hibernation Schedules
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/HibernationSchedule'
      responses:
        '200':
          description: Hibernation schedule created successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HibernationSchedule'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /settings/api-keys/{apiKeyId}:
    put:
      operationId: SettingsAPI_UpsertAPIKeySettings
      summary: CAST AI Create or update API key settings
      description: Create or update settings for an API key.
      tags:
        - Settings
      parameters:
        - name: apiKeyId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/APIKeySettings'
      responses:
        '200':
          description: API key settings updated successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIKeySettings'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /llm/providers:
    get:
      operationId: AIEnablerProvidersAPI_GetProviders
      summary: CAST AI Get LLM providers
      description: Gets the list of registered LLM providers.
      tags:
        - AI Enabler
      responses:
        '200':
          description: Successful response with list of providers.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/LLMProvidersResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: AIEnablerProvidersAPI_RegisterProviders
      summary: CAST AI Register LLM providers
      description: Registers LLM providers.
      tags:
        - AI Enabler
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RegisterProvidersRequest'
      responses:
        '200':
          description: Providers registered successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/LLMProvidersResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /metrics/prom:
    get:
      operationId: MetricsAPI_GetClusterMetrics
      summary: CAST AI Get cluster metrics
      description: Returns Prometheus-compatible cluster metrics.
      tags:
        - Cost Reports
      responses:
        '200':
          description: Successful response with cluster metrics.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /metrics/nodes:
    get:
      operationId: MetricsAPI_GetNodeMetrics
      summary: CAST AI Get node metrics
      description: Returns node-level metrics data.
      tags:
        - Cost Reports
      responses:
        '200':
          description: Successful response with node metrics.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /metrics/workloads:
    get:
      operationId: MetricsAPI_GetWorkloadMetrics
      summary: CAST AI Get workload metrics
      description: >-
        Returns workload-level metrics including cluster_id, namespace,
        workload_name, and workload_type.
      tags:
        - Cost Reports
      responses:
        '200':
          description: Successful response with workload metrics.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /metrics/allocation-groups:
    get:
      operationId: MetricsAPI_GetAllocationGroupMetrics
      summary: CAST AI Get allocation group metrics
      description: Returns allocation group-level metrics data.
      tags:
        - Cost Reports
      responses:
        '200':
          description: Successful response with allocation group metrics.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: >-
        API key for authentication. Create access keys from the CAST AI
        console under API > API access keys.
  parameters:
    ClusterId:
      name: clusterId
      in: path
      required: true
      description: The unique identifier of the cluster.
      schema:
        type: string
        format: uuid
    NodeId:
      name: nodeId
      in: path
      required: true
      description: The unique identifier of the node.
      schema:
        type: string
        format: uuid
    NodeTemplateId:
      name: nodeTemplateId
      in: path
      required: true
      description: The unique identifier of the node template.
      schema:
        type: string
        format: uuid
  responses:
    Unauthorized:
      description: Authentication failed. Invalid or missing API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      properties:
        message:
          type: string
          description: Human-readable error message.
        code:
          type: integer
          description: Error code.
    ListNodesResponse:
      type: object
      properties:
        items:
          type: array
          items:
            $ref: '#/components/schemas/Node'
    Node:
      type: object
      properties:
        id:
          type: string
          format: uuid
        name:
          type: string
        instanceType:
          type: string
        state:
          type: string
          enum:
            - ready
            - not_ready
            - draining
            - deleting
        createdAt:
          type: string
          format: date-time
        labels:
          type: object
          additionalProperties:
            type: string
    DrainNodeRequest:
      type: object
      properties:
        force:
          type: boolean
          description: Whether to force drain the node.
        timeout:
          type: integer
          description: Drain timeout in seconds.
    DrainNodeResponse:
      type: object
      properties:
        nodeId:
          type: string
          format: uuid
        status:
          type: string
    ClusterPolicies:
      type: object
      properties:
        enabled:
          type: boolean
          description: Whether autoscaler policies are enabled.
        unschedulablePods:
          type: object
          properties:
            enabled:
              type: boolean
        nodeDownscaler:
          type: object
          properties:
            enabled:
              type: boolean
            emptyNodes:
              type: object
              properties:
                enabled:
                  type: boolean
                delaySeconds:
                  type: integer
        spotInstances:
          type: object
          properties:
            enabled:
              type: boolean
            maxReclaimRate:
              type: number
    ListNodeTemplatesResponse:
      type: object
      properties:
        items:


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# Full source: https://raw.githubusercontent.com/api-evangelist/cast-ai/refs/heads/main/openapi/cast-ai-kubernetes-cost-optimization-openapi.yml