> ## Documentation Index > Fetch the complete documentation index at: https://docs.parlayx.com/llms.txt > Use this file to discover all available pages before exploring further. # Submit Order > Places an order on a Limitless outcome and returns the issued order id. ## OpenAPI ````yaml /openapi/v1.json post /v1/limitless/orders openapi: 3.0.0 info: title: ParlayX API version: 1.0.0 description: Aggregated prediction-market trading API servers: - url: https://api.parlayx.com security: [] tags: - name: Authentication description: Confirm your signing and read the server clock. - name: Discovery description: Browse sports, competitions, events, and markets. - name: Polymarket description: Submit and manage orders on Polymarket outcomes. - name: Kalshi description: Submit and manage orders on Kalshi markets. - name: ProphetX description: Submit and manage orders on ProphetX strikes. - name: Limitless description: Discover and trade Limitless markets. paths: /v1/limitless/orders: post: tags: - Limitless summary: Submit Order description: Places an order on a Limitless outcome and returns the issued order id. operationId: submitLimitlessOrder parameters: - name: PX-Key-Id in: header required: true schema: type: string description: The key id issued for your signing keypair. - name: PX-Timestamp in: header required: true schema: type: string description: >- Unix seconds at signing, valid within 30 seconds of the server clock. - name: PX-Signature in: header required: true schema: type: string description: Ed25519 signature of the request - name: PX-Content-Sha256 in: header required: true schema: type: string description: >- Hex SHA-256 of the request body, or the SHA-256 of the empty string when there is no body. - schema: type: string minLength: 1 description: >- Idempotency key for this request. Re-sending the same key with the same body returns the original result and creates no duplicate; re-sending it with a different body is rejected with 422. example: 2f1a8c4e-0b3d-4a9c-8e7f-1a2b3c4d5e6f required: true name: Idempotency-Key in: header requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/LimitlessOrderRequest' responses: '201': description: >- Order accepted; `status` is the order's recorded state, and acceptance alone does not mean it is resting or filled content: application/json: schema: $ref: '#/components/schemas/SubmitLimitlessOrderResponse' '400': description: >- Invalid request, a missing/malformed Idempotency-Key header, or Limitless trading is not available in this environment content: application/json: schema: $ref: '#/components/schemas/BadRequestError' '401': description: The request was not authenticated content: application/json: schema: $ref: '#/components/schemas/AuthError' '403': description: The key is not permitted to perform this action content: application/json: schema: $ref: '#/components/schemas/AuthError' '422': description: Idempotency key reused with a different request body content: application/json: schema: $ref: '#/components/schemas/IdempotencyConflictError' '429': description: >- The organization has exceeded its request rate; retry after the Retry-After interval content: application/json: schema: $ref: '#/components/schemas/AuthError' '500': description: Internal error content: application/json: schema: $ref: '#/components/schemas/ApiError' '503': description: Authentication is temporarily unavailable content: application/json: schema: $ref: '#/components/schemas/AuthError' components: schemas: LimitlessOrderRequest: type: object properties: marketSlug: type: string minLength: 1 description: Limitless market slug, exactly as the venue's market API names it. example: doge-up-or-down-daily-1787500800 tokenId: type: string description: Limitless outcome conditional-token id (raw integer string). example: >- 10999813436902295279687793687143205491693625423224337570276428722503253471600 side: $ref: '#/components/schemas/LimitlessSide' type: type: string enum: - MARKET - LIMIT description: Use "limit" for GTC and "market" for FAK or FOK. amount: type: string description: >- Order size in dollars for an immediate BUY unless amountUnit is shares, and in shares otherwise. example: '2' timeInForce: oneOf: - $ref: '#/components/schemas/LimitlessFakTimeInForce' - $ref: '#/components/schemas/LimitlessFokTimeInForce' - $ref: '#/components/schemas/LimitlessGtcTimeInForce' discriminator: propertyName: type mapping: FAK: '#/components/schemas/LimitlessFakTimeInForce' FOK: '#/components/schemas/LimitlessFokTimeInForce' GTC: '#/components/schemas/LimitlessGtcTimeInForce' default: type: FAK description: Execution policy; defaults to FAK. stpPolicy: $ref: '#/components/schemas/LimitlessSelfTradePolicy' required: - marketSlug - tokenId - side - type - amount title: Order Request SubmitLimitlessOrderResponse: type: object properties: orderId: type: string format: uuid description: Issued order id. example: 3f8b2c9a-2d18-4f7e-9c2a-1b6e1f0c8a4d status: $ref: '#/components/schemas/TradingOrderStatus' required: - orderId - status BadRequestError: anyOf: - $ref: '#/components/schemas/ApiError' - $ref: '#/components/schemas/IdempotencyBadRequestError' AuthError: type: object properties: error: type: object properties: code: $ref: '#/components/schemas/AuthErrorCode' message: type: string description: Plain-text explanation of the error. required: - code - message required: - error title: Auth Error IdempotencyConflictError: type: object properties: error: type: object properties: code: type: string enum: - IDEMPOTENCY_CONFLICT example: IDEMPOTENCY_CONFLICT message: type: string example: Idempotency key was reused with a different request body required: - code - message required: - error ApiError: type: object properties: error: type: object properties: code: $ref: '#/components/schemas/ApiErrorCode' message: type: string description: Plain-text explanation of the error. orderId: type: string format: uuid description: >- The affected order, present only on ORDER_RECONCILIATION_REQUIRED; read it back to determine whether it reached the venue. required: - code - message required: - error title: API Error LimitlessSide: type: string enum: - BUY - SELL description: Order direction. example: BUY LimitlessFakTimeInForce: type: object properties: type: type: string enum: - FAK amountUnit: type: string enum: - usd - shares description: Explicit sizing unit for a FAK BUY; defaults to usd. maxFillPrice: type: string description: Optional signed per-share BUY ceiling from 0.001 to 0.999 inclusive. minFillPrice: type: string description: Optional signed per-share SELL floor from 0.001 to 0.999 inclusive. required: - type additionalProperties: false description: Fill immediately within the signed price bound and cancel the remainder. title: FillAndKill LimitlessFokTimeInForce: type: object properties: type: type: string enum: - FOK maxFillPrice: type: string description: >- Optional per-share ceiling this order may fill at, from 0.001 to 0.999 inclusive, in steps of 0.001. Accepted on a buy only. Without it a FOK fills at the book's price, which is the venue's own behaviour; with it the order is refused rather than placed when the market already sits above the ceiling. Unlike a FAK's ceiling, this one is not sent to the venue as a price: a fill-or-kill takes none here, so the ceiling is checked against the book before the order is placed and again against what it filled at. example: '0.55' minFillPrice: type: string description: >- Optional per-share floor this order may fill at, from 0.001 to 0.999 inclusive, in steps of 0.001. Accepted on a FOK SELL only. Without it a FOK sell fills at the book's price, which is the venue's own behaviour; with it the order is refused rather than placed when the market already sits below the floor. example: '0.45' required: - type additionalProperties: false description: >- Fill or kill: fill in full immediately or cancel. A buy is sized in dollars and may cap its price with maxFillPrice; a sell is sized in outcome shares as a fixed-point decimal (up to 6 places) and may floor its price with minFillPrice. Both bounds are optional. title: FillOrKill LimitlessGtcTimeInForce: type: object properties: type: type: string enum: - GTC price: type: string description: >- Per-share price this order rests at, from 0.001 to 0.999 inclusive, in steps of 0.001. Required for GTC. example: '0.55' postOnly: type: boolean description: >- Reject this order instead of placing it if it would match immediately, so that it only ever rests on the book as a maker order. Defaults to false. Accepted on a resting order only, since an order meant to fill immediately cannot also refuse to. required: - type - price additionalProperties: false description: >- Good till cancelled: rest at price until filled or cancelled. Sized in outcome shares on both sides. title: GoodTillCancelled LimitlessSelfTradePolicy: type: string enum: - CANCEL_MAKER - CANCEL_TAKER - CANCEL_BOTH description: Self-trade policy within the shared wallet; defaults to CANCEL_MAKER. example: CANCEL_MAKER TradingOrderStatus: type: string enum: - PENDING - SUBMITTED - OPEN - FILLED - CANCELLED - REJECTED description: >- Order lifecycle status. | Status | Meaning | | --- | --- | | `PENDING` | Accepted, not yet sent to the venue. | | `SUBMITTED` | At the venue, outcome not yet known. Either not yet acknowledged, or an immediate-or-cancel order acknowledged but not yet settled. | | `OPEN` | Resting on the venue, and cancellable. | | `FILLED` | Fully filled. | | `CANCELLED` / `REJECTED` | Terminal. | example: OPEN IdempotencyBadRequestError: type: object properties: error: type: object properties: code: $ref: '#/components/schemas/IdempotencyBadRequestErrorCode' message: type: string required: - code - message required: - error title: Idempotency Error AuthErrorCode: type: string enum: - UNAUTHORIZED - BAD_CONTENT_HASH - FORBIDDEN - RATE_LIMITED - AUTH_UNAVAILABLE description: Stable identifier for the error category. ApiErrorCode: type: string enum: - INVALID_REQUEST - NOT_FOUND - INSUFFICIENT_BALANCE - IDEMPOTENCY_CONFLICT - ORDER_NOT_CANCELLABLE - ORDER_RECONCILIATION_REQUIRED - RATE_LIMITED - INTERNAL_ERROR description: Stable identifier for the error category. IdempotencyBadRequestErrorCode: type: string enum: - IDEMPOTENCY_KEY_REQUIRED - IDEMPOTENCY_KEY_INVALID description: Stable identifier for the Idempotency-Key header validation failure. example: IDEMPOTENCY_KEY_REQUIRED ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.