> ## Documentation Index > Fetch the complete documentation index at: https://docs.ornn.com/llms.txt > Use this file to discover all available pages before exploring further. # List reserved GPU nodes > Returns up to 5,000 nodes belonging to an owned reservation. The customer response has no cursor; limit and cursor do not paginate this reservation-scoped read. A listed node is not necessarily ready to join a cluster. Check health_readiness for heartbeat-based launch blockers; ready true with heartbeat:unknown is not proof of a reachable host. Launch rechecks eligibility, ownership, and availability. This reference describes the buyer reservation view. ## OpenAPI ````yaml openapi.yaml GET /v1/orchestrator/nodes openapi: 3.1.0 info: title: Ornn compute API version: 1.0.0 description: >- Customer HTTP API for Ornn GPU capacity. It covers reserved capacity and nodes, VM and Bare Metal access, Kubernetes and Slurm clusters, SSH keys, storage volumes and GitHub repositories, private networks, monitoring, buying and selling capacity (Reserve, Market, Spot, and Relist), and billing. API keys are scoped to one organization and act with their creator's access there; account, team, and API-key management stay in the console. Most operations require an approved organization. See https://docs.ornn.com/api-keys to create a key and https://docs.ornn.com/guides/kubernetes-api for an end-to-end Kubernetes integration. Examples use fictional IDs and credentials. The info.version field identifies the contract revision, not a shared API path version. contact: email: support@ornn.com servers: - url: https://api.ornn.com description: Production security: - OrnnApiKey: [] tags: - name: Authentication - name: Reservations - name: GPU nodes - name: Clusters - name: Workers - name: Virtual machines description: >- Choose a VM disk, launch VM access on a reservation, and read each VM's status, launch progress, and SSH connection details. - name: Bare Metal description: >- Launch Bare Metal access on a reservation, read a host's readiness and SSH connection details, and reboot or hard reset it. - name: SSH keys description: >- Register public keys for your organization, choose which keys a VM or Bare Metal reservation uses, and queue key delivery to machines. Slurm clusters take organization key IDs at launch. Kubernetes API access does not use SSH keys. - name: Reserve description: >- Browse reserved-capacity listings and their terms, and post, cancel, or accept offers. Reserve listings are visible to approved organizations. - name: Market description: >- Browse relisted capacity and buy windows at the asking price, paid up front. Open to every member of your organization. - name: Spot description: >- Hourly order books for VMs with 1, 2, 4, or 8 GPUs on one node: read books, trades, and quotes, place and cancel bids, and follow fills. - name: Relist description: >- Sell whole nodes from a reservation you hold at your asking price, and manage those listings. - name: Storage description: >- Managed volumes, their files, and GitHub repository pulls. Volumes belong to the API key's creator in the key's organization. - name: Networks description: >- Organization private networks and the WireGuard configs you use to reach private machines and clusters. - name: Monitoring description: >- Machine telemetry and console logs for capacity your organization holds. Reads are limited to your reservation window. - name: Billing description: >- Invoices, billing summary, usage cost, Ornn credits, and account statements. Saving a card and paying invoices stay in the console. externalDocs: description: REST integration walkthrough url: >- https://docs.ornn.com/guides/kubernetes-access#provision-and-manage-through-rest paths: /v1/orchestrator/nodes: get: tags: - GPU nodes summary: List reserved GPU nodes description: >- Returns up to 5,000 nodes belonging to an owned reservation. The customer response has no cursor; limit and cursor do not paginate this reservation-scoped read. A listed node is not necessarily ready to join a cluster. Check health_readiness for heartbeat-based launch blockers; ready true with heartbeat:unknown is not proof of a reachable host. Launch rechecks eligibility, ownership, and availability. This reference describes the buyer reservation view. operationId: listReservationNodes parameters: - name: reservation_id in: query required: true description: Owned reservation to inspect. schema: type: string format: uuid example: 11111111-1111-4111-8111-111111111111 responses: '200': description: >- Nodes associated with the owned reservation; launch eligibility is checked separately. content: application/json: schema: $ref: '#/components/schemas/NodeList' example: nodes: - node_id: 33333333-3333-4333-8333-333333333333 reservation_id: 11111111-1111-4111-8111-111111111111 controller_id: null status: bare-metal health_readiness: ready: true status: ready reasons: [] advisory_reasons: [] gpu_type: H100 gpu_count: 8 '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' default: $ref: '#/components/responses/Error' components: schemas: NodeList: type: object required: - nodes properties: nodes: type: array items: $ref: '#/components/schemas/Node' Node: type: object required: - node_id - reservation_id - controller_id - status properties: node_id: type: string format: uuid reservation_id: type: - string - 'null' format: uuid controller_id: type: - string - 'null' format: uuid description: The cluster currently holding this node, or null. status: type: string description: >- Node lifecycle or access mode, such as bare-metal; not a liveness signal. health_readiness: $ref: '#/components/schemas/NodeHealthReadiness' gpu_type: type: - string - 'null' gpu_count: type: - integer - 'null' hostname: type: - string - 'null' facility_id: type: - string - 'null' format: uuid cpu_type: type: - string - 'null' memory_bytes: type: - integer - 'null' format: int64 storage_bytes: type: - integer - 'null' format: int64 ip: type: string port: type: - integer - 'null' username: type: string ssh_endpoint: type: string enrolled_at: type: string format: date-time cleanup_state: type: string Error: type: object properties: code: type: string detail: oneOf: - type: string - type: object required: - code - message properties: code: type: string message: type: string NodeHealthReadiness: type: object description: >- Heartbeat-based launch preflight returned on reservation nodes. A stale heartbeat blocks launch. Missing heartbeat evidence returns ready true with heartbeat:unknown in advisory_reasons; this is not proof of host reachability, GPU health, or workload readiness. Treat an absent readiness object as unknown, not as ready. The reservation-node serializer returns an object, never null. required: - ready - status - reasons - advisory_reasons properties: ready: type: boolean description: Whether the heartbeat preflight reports no blocking reason. status: type: string enum: - ready - blocked reasons: type: array items: type: string description: Blocking reasons, such as heartbeat:stale. advisory_reasons: type: array items: type: string description: Nonblocking advisories, such as heartbeat:unknown. example: ready: false status: blocked reasons: - heartbeat:stale advisory_reasons: [] responses: Unauthorized: description: >- The credential is missing, invalid, revoked, or no longer belongs to a current organization member. Check the HTTP status before parsing the body. content: application/json: schema: $ref: '#/components/schemas/Error' Forbidden: description: >- The credential lacks access to this operation, or the organization requires approval. An API key does not bypass these checks. content: application/json: schema: $ref: '#/components/schemas/Error' Error: description: >- Unsuccessful request. Check HTTP status first. Errors may have detail.code/detail.message, a string detail and optional top-level code, or an empty/non-JSON body. 401: invalid credential; 403: access or approval required; 404: not visible or credentials not ready; 409: lifecycle conflict; 429: back off; 5xx: service failure. Inspect current state before retrying mutations. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: OrnnApiKey: type: http scheme: bearer bearerFormat: ornn_sk_... description: >- Create an organization API key in Account Settings > Developer. Do not send this key to the Kubernetes API server. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.