> ## 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. # Get Spot order book depth > Returns aggregated depth for one GPU type: GPUs and order counts at each price level, up to 50 levels per side. Depth never identifies who placed an order. A bid fills against one ask with room for all its GPUs, so a level with fewer free GPUs cannot fill a bid. Some asks sell only to 8-GPU bids; use a quote to see what a bid of your size would fill. CLI equivalent: `ornn spot book --gpu-slug `. ## OpenAPI ````yaml openapi.yaml GET /v1/markets/spot/books/{gpuSlug} 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/markets/spot/books/{gpuSlug}: get: tags: - Spot summary: Get Spot order book depth description: >- Returns aggregated depth for one GPU type: GPUs and order counts at each price level, up to 50 levels per side. Depth never identifies who placed an order. A bid fills against one ask with room for all its GPUs, so a level with fewer free GPUs cannot fill a bid. Some asks sell only to 8-GPU bids; use a quote to see what a bid of your size would fill. operationId: capacityGetSpotBook parameters: - name: gpuSlug in: path required: true description: Catalog GPU slug of the order book, from listSpotBooks. schema: type: string example: nvidia_h100_sxm responses: '200': description: Order book depth. content: application/json: schema: $ref: '#/components/schemas/CapacitySpotDepth' example: gpuSlug: nvidia_h100_sxm orderBookId: bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb asks: - pricePerGpuHourMicroUsd: 2650000 gpus: 16 orders: 2 - pricePerGpuHourMicroUsd: 2900000 gpus: 8 orders: 1 bids: - pricePerGpuHourMicroUsd: 2300000 gpus: 8 orders: 1 '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': description: There is no order book for that GPU slug. content: application/json: schema: $ref: '#/components/schemas/Error' example: detail: code: order_book_not_found message: There is no spot market for that GPU type. default: $ref: '#/components/responses/Error' components: schemas: CapacitySpotDepth: type: object required: - gpuSlug - orderBookId - asks - bids properties: gpuSlug: type: string orderBookId: type: string format: uuid asks: type: array description: Up to 50 ask levels, lowest price first. items: $ref: '#/components/schemas/CapacitySpotLevel' bids: type: array description: Up to 50 bid levels, highest price first. items: $ref: '#/components/schemas/CapacitySpotLevel' Error: type: object properties: code: type: string detail: oneOf: - type: string - type: object required: - code - message properties: code: type: string message: type: string CapacitySpotLevel: type: object required: - pricePerGpuHourMicroUsd - gpus - orders properties: pricePerGpuHourMicroUsd: type: integer format: int64 description: Asks show what a buyer pays; bids show what a seller receives. gpus: type: integer description: GPUs resting at this price. orders: type: integer description: Orders resting at this price. 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.