> ## 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 order book depth > Returns aggregated depth for one GPU type and sale type: whole nodes and order counts at each price level, up to 50 levels per side. Ask levels also count their GPUs; a bid takes nodes of any size, so bid levels have none. With a region, asks are that location's and bids include those that take any location; without one, depth spans every location. Depth never identifies who placed an order. CLI equivalent: `ornn market book --gpu-slug `. ## OpenAPI ````yaml openapi.yaml GET /v1/markets/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, order books, 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: Order books description: >- Hourly order books for whole nodes, one VM per node: read books, trades, and quotes, place and cancel bids, and follow and end 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/books/{gpuSlug}: get: tags: - Order books summary: Get order book depth description: >- Returns aggregated depth for one GPU type and sale type: whole nodes and order counts at each price level, up to 50 levels per side. Ask levels also count their GPUs; a bid takes nodes of any size, so bid levels have none. With a region, asks are that location's and bids include those that take any location; without one, depth spans every location. Depth never identifies who placed an order. operationId: capacityGetBook parameters: - name: gpuSlug in: path required: true description: Catalog GPU slug of the order book, from List order books. schema: type: string example: nvidia_h100_sxm - name: saleType in: query required: false description: >- spot (the default): a reservation on the node can end the VM. on-demand: only you, the seller or the listing's end ends it. schema: type: string enum: - spot - on-demand default: spot example: spot - name: region in: query required: false description: >- A region with an order book, for example us-east-11 (see GET /v1/markets/books). Omit for every location. schema: type: string example: us-east-11 responses: '200': description: Order book depth. content: application/json: schema: $ref: '#/components/schemas/CapacityMarketDepth' example: gpuSlug: nvidia_h100_sxm saleType: spot region: us-east-11 orderBookId: bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb asks: - pricePerGpuHourMicroUsd: 2650000 nodes: 2 gpus: 16 orders: 2 - pricePerGpuHourMicroUsd: 2900000 nodes: 1 gpus: 8 orders: 1 bids: - pricePerGpuHourMicroUsd: 2300000 nodes: 3 gpus: null 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 order book for that GPU type. default: $ref: '#/components/responses/Error' components: schemas: CapacityMarketDepth: type: object required: - gpuSlug - saleType - region - orderBookId - asks - bids properties: gpuSlug: type: string saleType: type: string enum: - spot - on-demand description: >- spot: a reservation on the node can end the VM. on-demand: only a stop or the listing's end ends it. region: type: - string - 'null' description: The location the depth is for; null when it spans every location. orderBookId: type: - string - 'null' format: uuid description: The location's book; null when locations are combined. asks: type: array description: Up to 50 ask levels, lowest price first. items: $ref: '#/components/schemas/CapacityMarketLevel' bids: type: array description: Up to 50 bid levels, highest price first. items: $ref: '#/components/schemas/CapacityMarketLevel' Error: type: object properties: code: type: string detail: oneOf: - type: string - type: object required: - code - message properties: code: type: string message: type: string CapacityMarketLevel: type: object required: - pricePerGpuHourMicroUsd - nodes - gpus - orders properties: pricePerGpuHourMicroUsd: type: integer format: int64 description: Asks show what a buyer pays; bids show what a seller receives. nodes: type: integer description: Whole nodes resting at this price. gpus: type: - integer - 'null' description: >- GPUs on the ask nodes resting at this price; null for bids, which take nodes of any size. 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.