> ## Documentation Index > Fetch the complete documentation index at: https://docs.domino.ai/llms.txt > Use this file to discover all available pages before exploring further. # Start App Version > Start an existing App Version, creating a new instance for it ## OpenAPI ````yaml /api-specs/6.3/public-api.json post /api/apps/beta/apps/{appId}/versions/{versionId}/start openapi: 3.0.3 info: title: Domino Public API description: Reference for Domino's public REST API endpoints. version: 6.3.0 x-catalog-key: nucleus servers: - url: https://mycluster.domino.tech description: >- Replace 'mycluster.domino.tech' with your Domino cluster hostname. For Domino Cloud customers, that is `your-subdomain`.domino.tech (e.g., acme.domino.tech). For self-hosted deployments, it is the hostname you reach the Domino UI at. security: [] tags: - name: AIGateway x-displayName: AIGateway - name: AppInstances x-displayName: AppInstances - name: AppVersions x-displayName: AppVersions - name: Apps x-displayName: Apps - name: AsyncPredictions x-displayName: AsyncPredictions - name: AuditTrail x-displayName: AuditTrail - name: BillingTag x-displayName: BillingTag - name: BillingTagSettings x-displayName: BillingTagSettings - name: Cost x-displayName: Cost - name: CustomMetrics x-displayName: CustomMetrics - name: DataSource x-displayName: DataSource - name: DatasetRw x-displayName: DatasetRw - name: DeploymentTargets x-displayName: DeploymentTargets - name: Environments x-displayName: Environments - name: Extensions x-displayName: Extensions - name: GenAI x-displayName: GenAI - name: HPC Jobs x-displayName: HPC Jobs - name: HardwareTier x-displayName: HardwareTier - name: Jobs x-displayName: Jobs - name: ModelAPI x-displayName: ModelAPI - name: ModelAPIVersion x-displayName: ModelAPIVersion - name: ModelDeployment x-displayName: ModelDeployment - name: Organizations x-displayName: Organizations - name: PPM x-displayName: PPM - name: PersonalAccessToken x-displayName: PersonalAccessToken - name: ProjectSharedDatasets x-displayName: ProjectSharedDatasets - name: ProjectTemplates x-displayName: ProjectTemplates - name: Projects x-displayName: Projects - name: ProjectsCommits x-displayName: ProjectsCommits - name: ProjectsFiles x-displayName: ProjectsFiles - name: RegisteredModels x-displayName: RegisteredModels - name: ServiceAccounts x-displayName: ServiceAccounts - name: Users x-displayName: Users - name: Workspaces x-displayName: Workspaces - name: nucleus_other x-displayName: other - name: PersonalAccessTokenAdmin x-displayName: PersonalAccessTokenAdmin - name: Git Credentials x-displayName: Git Credentials - name: Activity x-displayName: Activity - name: Admin x-displayName: Admin - name: Notifications x-displayName: Notifications - name: Adminnotifications x-displayName: Adminnotifications - name: UserManagement x-displayName: UserManagement - name: WhiteLabel x-displayName: WhiteLabel - name: Authentication and Authorization x-displayName: Authentication and Authorization - name: Code x-displayName: Code - name: ComputeCluster x-displayName: ComputeCluster - name: Control Center x-displayName: Control Center - name: controlcenter x-displayName: controlcenter - name: DataSourceCredential x-displayName: DataSourceCredential - name: DataMount x-displayName: DataMount - name: DataPlane x-displayName: DataPlane - name: dataset x-displayName: dataset - name: Datasets x-displayName: Datasets - name: datasetrw.api x-displayName: datasetrw.api - name: DatasetObjectStore x-displayName: DatasetObjectStore - name: DevelopV1ProjectTemplates x-displayName: DevelopV1ProjectTemplates - name: DevelopV1Projects x-displayName: DevelopV1Projects - name: Execution Events x-displayName: Execution Events - name: Files x-displayName: Files - name: Frontend x-displayName: Frontend - name: Gateway x-displayName: Gateway - name: Runs x-displayName: Runs - name: Search x-displayName: Search - name: Git x-displayName: Git - name: Metadata x-displayName: Metadata - name: Gruz x-displayName: Gruz - name: Guardrails x-displayName: Guardrails - name: Hardware Tier x-displayName: Hardware Tier - name: ActionableInsights x-displayName: ActionableInsights - name: Socket x-displayName: Socket - name: Job x-displayName: Job - name: Tags x-displayName: Tags - name: JobComments x-displayName: JobComments - name: LogsWithProblemSuggestion x-displayName: LogsWithProblemSuggestion - name: JobResults x-displayName: JobResults - name: Layout x-displayName: Layout - name: Metrics x-displayName: Metrics - name: MLFlow x-displayName: MLFlow - name: ModelManager x-displayName: ModelManager - name: Model Products x-displayName: Model Products - name: Project Goals x-displayName: Project Goals - name: ProjectManagement x-displayName: ProjectManagement - name: Templates x-displayName: Templates - name: Project x-displayName: Project - name: Launchers x-displayName: Launchers - name: Scheduled Jobs x-displayName: Scheduled Jobs - name: Quota x-displayName: Quota - name: RemoteFileSystem x-displayName: RemoteFileSystem - name: Scheduled Runs x-displayName: Scheduled Runs - name: Workspace x-displayName: Workspace - name: Logs x-displayName: Logs - name: WorkspaceComments x-displayName: WorkspaceComments - name: WorkspaceResults x-displayName: WorkspaceResults - name: Resource description: The Data Plane Resource API x-displayName: Resource - name: authz x-displayName: authz - name: volumes x-displayName: volumes - name: data transfers x-displayName: data transfers - name: downloads x-displayName: downloads - name: filesystems x-displayName: filesystems - name: snapshots x-displayName: snapshots - name: tasks x-displayName: tasks - description: Manage taxonomy namespaces. name: Tagging - Namespaces x-displayName: Tagging - Namespaces - description: Manage tags within namespaces. name: Tagging - Tags x-displayName: Tagging - Tags - description: Assign, remove, and list tag assignments on entities. name: Tagging - Entity Tags x-displayName: Tagging - Entity Tags - description: Look up entities by tag. name: Tagging - Entities x-displayName: Tagging - Entities - description: Fetch the full namespace + tag hierarchy. name: Tagging - Taxonomy Tree x-displayName: Tagging - Taxonomy Tree - description: Validate and import taxonomy data from a file. name: Tagging - Import x-displayName: Tagging - Import - description: Export the current taxonomy to a file. name: Tagging - Export x-displayName: Tagging - Export - description: Internal-only endpoints for service-account callers. name: Tagging - Internal x-displayName: Tagging - Internal - description: Manage property definitions and their groups. name: Properties - Definitions x-displayName: Properties - Definitions - description: Read and update an entity's property values. name: Properties - Values x-displayName: Properties - Values - description: Internal-only endpoints for service-account callers (properties). name: Properties - Internal x-displayName: Properties - Internal - name: config x-displayName: config - name: Workloads description: Everything related to deploying and managingDomino Workloads x-displayName: Workloads - name: Executor description: Executor-related commands x-displayName: Executor - name: HPC description: HPC workload management x-displayName: HPC - name: Endpoints x-displayName: Endpoints - name: mlflow-proxy_other x-displayName: other - name: attachments x-displayName: attachments - name: bundle-stages x-displayName: bundle-stages - name: bundles x-displayName: bundles - name: findings x-displayName: findings - name: drafts x-displayName: drafts - name: evidence-templates x-displayName: evidence-templates - name: policies x-displayName: policies - name: policy-versions x-displayName: policy-versions - name: policy-enforcers x-displayName: policy-enforcers - name: results x-displayName: results - name: rpc x-displayName: rpc - name: approvals x-displayName: approvals - description: >- Create, query, bulk-update, and evaluate priority-based access control rules. name: rules x-displayName: rules - name: domino-connect_other x-displayName: other - name: events x-displayName: events - name: curated-central-configs x-displayName: curated-central-configs - name: nodepools x-displayName: nodepools - name: ip-allowlist x-displayName: ip-allowlist externalDocs: description: OpenAPI url: https://swagger.io/resources/open-api/ paths: /api/apps/beta/apps/{appId}/versions/{versionId}/start: post: tags: - AppVersions summary: Start App Version description: Start an existing App Version, creating a new instance for it operationId: startAppVersion parameters: - description: The id of the app. in: path name: appId required: true schema: type: string - description: The id of the app version to start. in: path name: versionId required: true schema: type: string responses: '200': content: application/json: schema: $ref: '#/components/schemas/nucleus_AppVersionResponse' description: Success '400': $ref: '#/components/responses/nucleus_400' '401': $ref: '#/components/responses/nucleus_401' '403': $ref: '#/components/responses/nucleus_403' '404': $ref: '#/components/responses/nucleus_404' '500': $ref: '#/components/responses/nucleus_500' security: - nucleus_DominoApiKey: [] - nucleus_BearerAuthentication: [] components: schemas: nucleus_AppVersionResponse: properties: autoscalingSpecification: $ref: '#/components/schemas/nucleus_AppAutoscalingSpecification' bundleId: description: Guardrails bundle ID. Immutable after creation. type: string bundleName: type: string createdAt: format: epoch type: number currentInstance: $ref: '#/components/schemas/nucleus_AppInstanceSummaryResponse' description: The most recently created instance for this AppVersion. description: description: Optional version description. type: string dfsCommitId: description: >- The original DFS commit ID specified when the version was created. May be null if not explicitly provided. type: string entryScript: description: >- Optional inline script to execute instead of the app's entry point. If provided, this script will take precedence over the entry point. type: string environmentId: type: string environmentRevisionId: type: string extendedIdentityPropagationToAppsEnabled: type: boolean externalVolumeMountIds: items: type: string type: array gitRef: $ref: '#/components/schemas/nucleus_GitRef' description: >- The original git reference (e.g. branch name) specified when the version was created. hardwareTierId: type: string id: type: string netAppVolumeIds: items: type: string type: array publisher: $ref: '#/components/schemas/nucleus_AppUserResponse' resolvedCommits: $ref: '#/components/schemas/nucleus_ResolvedCommits' description: >- Commit and import snapshots resolved at version creation time, representing the actual values used for execution. tags: items: $ref: '#/components/schemas/nucleus_AppVersionTag' type: array updatedAt: format: epoch type: number vanityUrl: type: string versionNumber: format: int64 type: integer required: - id - environmentId - environmentRevisionId - hardwareTierId - externalVolumeMountIds - netAppVolumeIds - createdAt - updatedAt - tags - extendedIdentityPropagationToAppsEnabled type: object nucleus_AppAutoscalingSpecification: properties: enabled: type: boolean maxReplicas: maximum: 30 minimum: 1 type: integer minReplicas: maximum: 30 minimum: 1 type: integer scaleDownStabilizationWindowSeconds: maximum: 3600 minimum: 0 type: integer scaleUpStabilizationWindowSeconds: maximum: 3600 minimum: 0 type: integer targetCpuAvgUtilizationPct: maximum: 100 minimum: 1 type: integer targetMemoryAvgUtilizationPct: maximum: 100 minimum: 1 type: integer useSessionAffinity: type: boolean required: - enabled type: object nucleus_AppInstanceSummaryResponse: properties: createdAt: format: epoch type: number describeUrl: type: string dfsCommitId: description: The DFS commit ID that was used for this instance's execution. type: string gitCommitId: description: The git commit SHA that was used for this instance's execution. type: string id: type: string status: type: string required: - id - createdAt - status type: object nucleus_GitRef: properties: type: enum: - head - commitId - branches - tags - custom type: string value: type: string required: - type type: object nucleus_AppUserResponse: type: object required: - id - name properties: id: type: string name: type: string nucleus_ResolvedCommits: description: >- Resolved commit and import snapshot information captured at version creation time. properties: dfsCommitId: description: The DFS commit ID resolved at version creation time. type: string gitCommitId: description: The git commit SHA resolved at version creation time. type: string importedGitRepos: description: Imported git repo snapshots resolved at version creation time. items: $ref: '#/components/schemas/nucleus_ImportedGitRepoSnapshot' type: array importedProjects: description: Imported project snapshots resolved at version creation time. items: $ref: '#/components/schemas/nucleus_ImportedProjectSnapshot' type: array type: object nucleus_AppVersionTag: properties: key: type: string value: type: string required: - key - value type: object nucleus_ErrorV1: properties: code: description: Machine-readable error code. example: NOT_FOUND type: string message: description: Human-readable description of the error. example: The requested HPC Job could not be found. type: string required: - message type: object nucleus_ImportedGitRepoSnapshot: properties: ref: type: string repoId: type: string repoName: type: string required: - repoId - repoName - ref type: object nucleus_ImportedProjectSnapshot: properties: commitId: type: string directoryName: type: string ownerId: type: string projectId: type: string projectName: type: string release: type: string required: - projectId - projectName - ownerId - directoryName - commitId type: object responses: nucleus_400: content: application/json: schema: properties: error: type: string type: object description: Bad Request nucleus_401: content: application/json: example: code: UNAUTHORIZED message: Authentication is required to access this resource. schema: $ref: '#/components/schemas/nucleus_ErrorV1' description: Unauthorized - authentication is required or has failed. nucleus_403: content: application/json: example: code: FORBIDDEN message: You do not have permission to perform this action. schema: $ref: '#/components/schemas/nucleus_ErrorV1' description: Forbidden - the caller lacks permission to perform this action. nucleus_404: content: application/json: schema: properties: error: type: string type: object description: Not Found nucleus_500: content: application/json: schema: properties: error: type: string type: object description: Internal Server Error securitySchemes: nucleus_DominoApiKey: type: apiKey name: X-Domino-Api-Key in: header nucleus_BearerAuthentication: type: apiKey name: Authorization in: header ```` ## Related topics - [Start App Version (v1)](/6.3/api-reference/appversions/start-app-version-v1.md) - [Create App Version and Start (v1)](/6.3/api-reference/appversions/create-app-version-and-start-v1.md) - [Create App Version (v1)](/6.3/api-reference/appversions/create-app-version-v1.md) - [App Structure and Lifecycle](/6.3/platform-capabilities/features/apps/apps-in-domino/app-structure-lifecycle.md)