> ## 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. # Place a bid > Bids for GPUs or for nodes; send exactly one of gpus or nodes. A bid takes capacity from the lowest asks at or below your limit, fees included, oldest first at each price, across listings and, without a region, across locations. With gpus it takes GPUs until it has enough, so one node can supply part of a bid and a bid can span nodes. With nodes it takes that many distinct nodes with a GPU free, and every GPU free on each; each node runs as one VM, or as a few VMs on hosts whose GPUs can only be split in powers of two (6 GPUs run as a 4-GPU and a 2-GPU VM). A limit bid rests whatever it did not take, and later capacity fills it further; a market bid takes what is for sale now and cancels the rest with cancelReason unfilled_market_order. A bid never takes your own organization's capacity. nodes needs a market order; a limit bid with nodes is refused with nodes_need_market_order. The order counts GPUs: a bid for nodes records the GPUs it took as requested, and is filled when it found every node. Each set of GPUs the bid buys from one listing is a fill: one reservation whose ID is the fill ID, listed in the order's fillIds. The reservation appears shortly after the fill; poll GET /commerce/reservations/{reservationId} using the fill ID. Each hour is prepaid when it starts, from Ornn credits first and then your saved card. The bid is not refused for a missing card, but if the first or a later hour cannot be paid the reservation ends with endReason payment_failed. Save a card in the console before bidding unless your credits cover the hours. Requires Idempotency-Key. Available to every member of your organization; approval is not required. CLI equivalent, a market bid for nodes: `ornn market bid --gpu-slug --nodes 2 --yes`. Pass `--idempotency-key` to make a retry safe. Send a new `Idempotency-Key` for each bid. If the response is lost, retry with the same key and body: you get the original order back instead of a second bid. See [Rent GPUs on Spot](/guides/pay-as-you-go.md#use-the-api). ## OpenAPI ````yaml openapi.yaml POST /v1/markets/orders 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/orders: post: tags: - Order books summary: Place a bid description: >- Bids for GPUs or for nodes; send exactly one of gpus or nodes. A bid takes capacity from the lowest asks at or below your limit, fees included, oldest first at each price, across listings and, without a region, across locations. With gpus it takes GPUs until it has enough, so one node can supply part of a bid and a bid can span nodes. With nodes it takes that many distinct nodes with a GPU free, and every GPU free on each; each node runs as one VM, or as a few VMs on hosts whose GPUs can only be split in powers of two (6 GPUs run as a 4-GPU and a 2-GPU VM). A limit bid rests whatever it did not take, and later capacity fills it further; a market bid takes what is for sale now and cancels the rest with cancelReason unfilled_market_order. A bid never takes your own organization's capacity. nodes needs a market order; a limit bid with nodes is refused with nodes_need_market_order. The order counts GPUs: a bid for nodes records the GPUs it took as requested, and is filled when it found every node. Each set of GPUs the bid buys from one listing is a fill: one reservation whose ID is the fill ID, listed in the order's fillIds. The reservation appears shortly after the fill; poll GET /commerce/reservations/{reservationId} using the fill ID. Each hour is prepaid when it starts, from Ornn credits first and then your saved card. The bid is not refused for a missing card, but if the first or a later hour cannot be paid the reservation ends with endReason payment_failed. Save a card in the console before bidding unless your credits cover the hours. Requires Idempotency-Key. Available to every member of your organization; approval is not required. operationId: capacityPlaceBid parameters: - name: Idempotency-Key in: header required: true description: >- Required. A unique key of 1 to 200 characters for this operation, such as a UUID. Retrying with the same key and the same body returns the original result with HTTP 200 instead of creating a second one. The key is remembered for 24 hours per organization; reusing it for a different request returns 409 idempotency_conflict. A missing key returns 400 idempotency_key_required. schema: type: string minLength: 1 maxLength: 200 example: 3f1c2a9e-6b1d-4c55-9a77-0d2b8f1e4c10 requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CapacityMarketBidRequest' example: gpuSlug: nvidia_h100_sxm nodes: 2 orderType: market responses: '200': description: >- A retry with the same Idempotency-Key and body; returns the original order's current state. content: application/json: schema: $ref: '#/components/schemas/CapacityMarketOrderEnvelope' example: order: orderId: aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa orderBookId: bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb gpuSlug: nvidia_h100_sxm saleType: spot region: null side: bid orderType: limit pricePerGpuHourMicroUsd: 2500000 requested: 16 remaining: 16 filledNodes: 0 filledGpus: 0 fillIds: [] status: resting cancelReason: null createdAt: '2026-10-14T18:30:00.000Z' isMine: true isSeller: false '201': description: >- Bid placed. Check order.status: filled (everything requested bought), resting (waiting for more), or cancelled (a market bid's rest found nothing); fillIds lists what it bought. content: application/json: schema: $ref: '#/components/schemas/CapacityMarketOrderEnvelope' example: order: orderId: aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa orderBookId: bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb gpuSlug: nvidia_h100_sxm saleType: spot region: null side: bid orderType: market pricePerGpuHourMicroUsd: null requested: 16 remaining: 0 filledNodes: 2 filledGpus: 16 fillIds: - dddddddd-dddd-4ddd-8ddd-dddddddddddd status: filled cancelReason: null createdAt: '2026-10-14T18:30:00.000Z' isMine: true isSeller: false '400': description: Missing Idempotency-Key or invalid body. content: application/json: schema: $ref: '#/components/schemas/Error' example: detail: code: idempotency_key_required message: Send an Idempotency-Key header with this request. '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. '409': description: The Idempotency-Key was already used for a different request. content: application/json: schema: $ref: '#/components/schemas/Error' example: detail: code: idempotency_conflict message: That request key was already used for a different request. '422': description: >- Both gpus and nodes were sent (quantity_conflict), neither was or it is not a positive whole number (invalid_quantity), nodes was sent with a limit (nodes_need_market_order), orderType or saleType is unknown (invalid_sale_type), the region has no order book (unknown_region), or a limit has no positive price. content: application/json: schema: $ref: '#/components/schemas/Error' example: detail: code: nodes_need_market_order message: >- Buy nodes with a market order. A limit bid takes a number of GPUs. default: $ref: '#/components/responses/Error' components: schemas: CapacityMarketBidRequest: type: object description: Send exactly one of gpus or nodes; nodes needs orderType market. required: - gpuSlug - orderType additionalProperties: false properties: gpuSlug: type: string description: Catalog GPU slug of the order book. saleType: type: string enum: - spot - on-demand default: spot 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: >- A region with an order book, for example us-east-11 (see GET /v1/markets/books). Omit to fill at any location. A region without a book is refused with unknown_region. gpus: type: integer minimum: 1 description: >- GPUs, taken from the lowest asks first; one node can supply part of them and a bid can span nodes. Send this or nodes. nodes: type: integer minimum: 1 description: >- Distinct nodes with a GPU free, each giving every GPU free on it. Market orders only (nodes_need_market_order on a limit). Send this or gpus. orderType: type: string enum: - limit - market description: >- limit takes capacity at or below your price and rests the rest until it fills or you cancel. market takes what is for sale now and cancels the rest. pricePerGpuHourMicroUsd: type: integer format: int64 minimum: 1 description: >- Required for limit bids; omit for market bids. The most you pay per GPU-hour, fees included, in integer micro-USD (1000000 is $1.00). diskId: type: string format: uuid description: >- The disk every VM boots, from your disks or Ornn's. Omit to boot your newest disk, else Ornn's newest. CapacityMarketOrderEnvelope: type: object required: - order properties: order: $ref: '#/components/schemas/CapacityMarketOrder' Error: type: object properties: code: type: string detail: oneOf: - type: string - type: object required: - code - message properties: code: type: string message: type: string CapacityMarketOrder: type: object required: - orderId - side - status - isMine - isSeller properties: orderId: type: string format: uuid description: Order ID. orderBookId: type: string format: uuid gpuSlug: type: - string - 'null' saleType: type: - string - 'null' enum: - spot - on-demand - null region: type: - string - 'null' description: >- The order's region slug; null for a bid at any location. Each fill says where it runs. side: type: string enum: - bid - ask description: bid for your bids; ask for capacity your listings offer on the book. orderType: type: string enum: - limit - market pricePerGpuHourMicroUsd: type: - integer - 'null' format: int64 description: >- The order's own price: a bid's limit, or null for a market bid. Each fill's price is on the fill and its reservation. requested: type: - integer - 'null' description: >- The GPUs a bid asked for; for a bid for nodes, the GPUs it took. Null for an ask. remaining: type: - integer - 'null' description: The GPUs a bid has not bought yet. filledNodes: type: - integer - 'null' description: The nodes a bid has bought on, across its fills. filledGpus: type: - integer - 'null' description: The GPUs a bid has bought, across its fills. gpus: type: - integer - 'null' description: The GPUs an ask has for sale now; null for a bid. fillIds: type: array items: type: string format: uuid description: A bid's fills, oldest first; each is also a reservation ID. nodeGpus: type: - integer - 'null' description: The GPUs an ask's node has; null for a bid. status: type: string description: >- Bids: resting (waiting for more), filled (everything requested bought), or cancelled (the rest withdrawn; its fills keep running). Asks: resting, exhausted (every GPU on its node sold), or cancelled. Handle unrecognized values. cancelReason: type: - string - 'null' description: >- For example unfilled_market_order, cancelled_by_owner, or cancelled_by_admin. createdAt: type: - string - 'null' format: date-time isMine: type: boolean description: True when your organization placed this order. isSeller: type: boolean description: True when the order is capacity your organization listed. 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.