> ## 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 order books > Returns one order book per GPU type, sale type (spot or on-demand) and location, with its best ask and best bid. A location is a region slug such as us-east-11; the book with region any holds bids that take any location. Asks show what a buyer pays and bids show what a seller receives, so both already account for Ornn's fees. Prices are integer micro-USD per GPU-hour. Open to every member of your organization. CLI equivalent: `ornn market books`. See [Rent GPUs on Spot](/guides/pay-as-you-go.md#use-the-api) for the complete bid flow. ## OpenAPI ````yaml openapi.yaml GET /v1/markets/books 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: get: tags: - Order books summary: List order books description: >- Returns one order book per GPU type, sale type (spot or on-demand) and location, with its best ask and best bid. A location is a region slug such as us-east-11; the book with region any holds bids that take any location. Asks show what a buyer pays and bids show what a seller receives, so both already account for Ornn's fees. Prices are integer micro-USD per GPU-hour. Open to every member of your organization. operationId: capacityListBooks parameters: - name: gpuSlug in: query required: false description: Only books for this catalog GPU slug. schema: type: string example: nvidia_h100_sxm - name: saleType in: query required: false description: Only books of this sale type. schema: type: string enum: - spot - on-demand example: spot - name: region in: query required: false description: >- Only books at this region slug, or any for the books of bids at any location. schema: type: string example: us-east-11 responses: '200': description: Order books by GPU type, sale type and location. content: application/json: schema: $ref: '#/components/schemas/CapacityMarketBookList' example: orderBooks: - gpuSlug: nvidia_h100_sxm saleType: spot region: us-east-11 orderBookId: bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb bestAskPricePerGpuHourMicroUsd: 2650000 bestBidPricePerGpuHourMicroUsd: 2300000 - gpuSlug: nvidia_h100_sxm saleType: spot region: any orderBookId: cccccccc-cccc-4ccc-8ccc-cccccccccccc bestAskPricePerGpuHourMicroUsd: null bestBidPricePerGpuHourMicroUsd: 2400000 '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' default: $ref: '#/components/responses/Error' components: schemas: CapacityMarketBookList: type: object required: - orderBooks properties: orderBooks: type: array items: $ref: '#/components/schemas/CapacityMarketBook' CapacityMarketBook: type: object required: - gpuSlug - saleType - region - orderBookId properties: gpuSlug: type: string description: Catalog GPU slug of the book. 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 description: >- The book's region slug, for example us-east-11, or any for the book of bids that take any location. orderBookId: type: string format: uuid bestAskPricePerGpuHourMicroUsd: type: - integer - 'null' format: int64 description: Lowest ask, as a buyer pays it (fees included). bestBidPricePerGpuHourMicroUsd: type: - integer - 'null' format: int64 description: Highest bid, as a seller receives it (fees removed). Error: type: object properties: code: type: string detail: oneOf: - type: string - type: object required: - code - message properties: code: type: string message: type: string 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.