> ## 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. # Get version timeline > List all versions of an AI system with their first/last observed trace timestamps, used to draw version boundary markers. ## OpenAPI ````yaml /api-specs/cloud/public-api.json get /api/model-services/v1/aisystem/{system_id}/versions openapi: 3.0.3 info: title: Domino Public API description: Reference for Domino's public REST API endpoints. version: 6.4.0 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: Projects - name: Project templates - name: Workspaces - name: Jobs - name: HPC Jobs - name: Environments - name: Hardware Tiers - name: Datasets - name: Data Sources - name: GenAI - name: AI Systems - name: Apps - name: App versions - name: App instances - name: Model APIs - name: Registered models - name: Model deployment - name: Extensions - name: Cost and billing - name: Users and organizations - name: Service accounts - name: Personal Access Tokens - name: Personal Access Tokens (admin) - name: Audit Trail - name: Custom metrics - name: PPM - name: Model Monitoring models - name: Model Monitoring drift and quality - name: Model Monitoring settings - name: Model Monitoring authentication - name: Governance bundles - name: Governance policies - name: Governance evidence and results - name: Governance operations - name: NetApp Volumes - name: NetApp Volumes snapshots - name: NetApp Volumes filesystems - name: NetApp Volumes transfers - name: Tags - name: Properties externalDocs: description: OpenAPI url: https://swagger.io/resources/open-api/ paths: /api/model-services/v1/aisystem/{system_id}/versions: get: tags: - AI Systems summary: Get version timeline description: >- List all versions of an AI system with their first/last observed trace timestamps, used to draw version boundary markers. operationId: get_version_timeline parameters: - in: path name: system_id required: true schema: type: string responses: '200': content: application/json: schema: $ref: >- #/components/schemas/mlflow-proxy_GetVersionTimelineResponseBody description: OK default: content: application/problem+json: schema: $ref: '#/components/schemas/mlflow-proxy_ErrorModel' description: Error components: schemas: mlflow-proxy_GetVersionTimelineResponseBody: additionalProperties: false properties: $schema: description: A URL to the JSON Schema for this object. example: >- /api/model-services/v1/aisystem/schemas/GetVersionTimelineResponseBody.json format: uri readOnly: true type: string versions: description: Versions ordered by their first observed trace. items: $ref: '#/components/schemas/mlflow-proxy_VersionInfo' nullable: true type: array required: - versions type: object mlflow-proxy_ErrorModel: additionalProperties: false properties: $schema: description: A URL to the JSON Schema for this object. example: /api/model-services/v1/aisystem/schemas/ErrorModel.json format: uri readOnly: true type: string detail: description: >- A human-readable explanation specific to this occurrence of the problem. example: Property foo is required but is missing. type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/mlflow-proxy_ErrorDetail' nullable: true type: array instance: description: >- A URI reference that identifies the specific occurrence of the problem. example: https://example.com/error-log/abc123 format: uri type: string status: description: HTTP status code example: 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. example: Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. example: https://example.com/errors/example format: uri type: string type: object mlflow-proxy_VersionInfo: additionalProperties: false properties: label: description: Human-friendly name for the version (currently the version id). type: string last_seen_at: description: Timestamp of the most recent observed trace for this version. format: date-time type: string started_at: description: >- Timestamp of the first observed trace for this version. The frontend renders a vertical boundary marker at this time. format: date-time type: string version_id: description: Identifier of the AI system version. type: string required: - version_id - label - started_at - last_seen_at type: object mlflow-proxy_ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object ```` ## Related topics - [Get dataset timeline](/api-reference/model-monitoring-drift-and-quality/get-model-monitorv2apimodel-dataset-timeline.md) - [Attach a Domino object to a bundle](/api-reference/governance-bundles/attach-a-domino-object-to-a-bundle.md) - [Get bundle by ID](/api-reference/governance-bundles/get-bundle-by-id.md) - [Monitor Flows](/cloud/platform-capabilities/features/flows/monitor-flows.md)