> ## Documentation Index > Fetch the complete documentation index at: https://developers.circle.com/llms.txt > Use this file to discover all available pages before exploring further. # Get an order > Returns full detail for a single order, including lineage fields for tracing rolled orders and a fill object that is populated after matching. Follow `lineage.parentOrderId` backward or `lineage.childOrderId` forward to reconstruct the full chain for a rolled order. ## OpenAPI ````yaml openapi/match.yaml get /v1/match/orders/{id} openapi: 3.1.0 info: title: Circle Match API description: > The Circle Match API provides endpoints for Circle Match, a periodic batch-auction venue that coordinates USDC burn demand with USDC mint demand for eligible Circle Mint customers. ## Authentication All REST endpoints require a Bearer token: ``` Authorization: Bearer ``` ## WebSocket Real-time auction state and account events are delivered over a persistent WebSocket connection at `wss://api.circle.com/v1/match/ws` (production) or `wss://api-sandbox.circle.com/v1/match/ws` (sandbox). Obtain a short-lived ticket with `POST /v1/match/ws/ticket`, then pass two `Sec-WebSocket-Protocol` values in the upgrade request: - `circle-match.v1` - `ticket.` — the ticket value, prefixed with `ticket.` After connection, subscribe to the `market` channel for public auction state or the `account` channel for private order and fill events. See the Circle Match WebSocket reference for the full protocol specification. ## Error codes | Code | HTTP | Description | |--------|------|-------------| | 136001 | 400 | Auction locked — cancellations and less-competitive fee changes not accepted | | 136002 | 400 | Auction settling — try again after settlement completes | | 137001 | 400 | Insufficient available balance | | 137002 | 400 | Invalid wallet | | 137003 | 400 | Wallet not found | | 137004 | 409 | Idempotency key reused with different parameters | | 137005 | 400 | Fee change not more competitive during lock window | | 137006 | 409 | Self-match violation — open order on opposite side of same auction | | 137007 | 400 | Invalid fiat account | | 137008 | 400 | Maximum orders per auction reached | | 137009 | 400 | Transaction limit exceeded | | 137010 | 400 | Entity not eligible for Circle Match | | 138001 | 400 | Withdrawal amount exceeds available balance | | 138002 | 400 | Withdrawal request invalid | | 138003 | 404 | No Circle Match account found for this entity | | 138004 | 400 | Invalid withdrawal destination | | 139001 | 400 | Circle Match wallet invalid | version: 1.0.0 servers: - url: https://api.circle.com description: Production - url: https://api-sandbox.circle.com description: Sandbox security: - BearerAuth: [] tags: - name: Account description: Account balance and activity summary - name: Orders description: Place, list, retrieve, cancel, and modify orders - name: Withdrawals description: Withdraw restricted mint-side USDC - name: WebSocket description: Obtain a WebSocket connection ticket paths: /v1/match/orders/{id}: get: tags: - Orders summary: Get an order description: >- Returns full detail for a single order, including lineage fields for tracing rolled orders and a fill object that is populated after matching. Follow `lineage.parentOrderId` backward or `lineage.childOrderId` forward to reconstruct the full chain for a rolled order. operationId: getOrder parameters: - name: id in: path required: true schema: type: string format: uuid description: The orderId (UUID) to retrieve example: 550e8400-e29b-41d4-a716-446655440000 responses: '200': description: Order detail content: application/json: schema: type: object required: - data properties: data: $ref: '#/components/schemas/Order' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Order not found content: application/json: schema: $ref: '#/components/schemas/Error' components: schemas: Order: description: A Circle Match order — either a BURN (USDC-to-USD) or MINT (USD-to-USDC) oneOf: - $ref: '#/components/schemas/BurnOrder' - $ref: '#/components/schemas/MintOrder' discriminator: propertyName: orderType mapping: BURN: $ref: '#/components/schemas/BurnOrder' MINT: $ref: '#/components/schemas/MintOrder' Error: type: object required: - code - message properties: code: type: integer description: Circle error code example: 137001 message: type: string description: Human-readable error description example: Insufficient available balance BurnOrder: description: A BURN order that redeems USDC for USD allOf: - $ref: '#/components/schemas/OrderBase' - type: object required: - sourceWalletId - fiatAccountId properties: orderType: type: string enum: - BURN sourceWalletId: type: string description: Circle Mint wallet ID that funded the burn example: '1000001234' fiatAccountId: type: string format: uuid description: Fiat account that receives settlement proceeds example: 550e8400-e29b-41d4-a716-446655440001 MintOrder: description: A MINT order that mints USDC from USD allOf: - $ref: '#/components/schemas/OrderBase' - type: object properties: orderType: type: string enum: - MINT sourceWalletId: oneOf: - type: string - type: 'null' description: >- Always null for MINT orders. Present in the response because the Go server marshals the nil pointer as an explicit null key. example: null fiatAccountId: oneOf: - type: string - type: 'null' description: >- Always null for MINT orders. Present in the response because the Go server marshals the nil pointer as an explicit null key. example: null OrderBase: type: object required: - orderId - auctionId - lineage - orderType - amount - postFillAction - status - createdAt - updatedAt - fill properties: orderId: type: string format: uuid description: >- Unique order identifier; matches the idempotencyKey from the create request example: 550e8400-e29b-41d4-a716-446655440000 auctionId: oneOf: - type: integer - type: 'null' description: >- Identifier of the auction cycle this order entered. Null before the order is admitted to an auction. example: 42 lineage: $ref: '#/components/schemas/OrderLineage' orderType: $ref: '#/components/schemas/OrderType' amount: $ref: '#/components/schemas/Money' feeBps: oneOf: - type: string - type: 'null' description: >- Fee limit in basis points. For BURN orders: maximum fee willing to pay. For MINT orders: minimum rebate required. Null for market orders. example: '5' postFillAction: $ref: '#/components/schemas/PostFillAction' status: $ref: '#/components/schemas/OrderStatus' createdAt: type: string format: date-time example: '2026-08-17T00:00:00Z' updatedAt: type: string format: date-time example: '2026-08-17T00:05:00Z' fill: oneOf: - $ref: '#/components/schemas/OrderFill' - type: 'null' description: Fill detail. Null until the order is matched. OrderLineage: type: object required: - parentOrderId - childOrderId properties: parentOrderId: oneOf: - type: string format: uuid - type: 'null' description: >- UUID of the order this rolled from. Null if this is the original order. example: null childOrderId: oneOf: - type: string format: uuid - type: 'null' description: >- UUID of the order this rolled into. Null if not yet rolled or if cancelled. example: null OrderType: type: string description: Whether this is a BURN (USDC-to-USD) or MINT (USD-to-USDC) order enum: - BURN - MINT Money: type: object description: A monetary amount with its currency required: - amount - currency properties: amount: type: string description: Decimal amount as a string, rounded to 2 decimal places example: '500.00' currency: type: string description: ISO 4217 currency code example: USD PostFillAction: type: string description: | Action to take on unfilled remainder after an auction cycle closes. - `roll`: Carry remainder into the next auction as a new linked order. - `fallback`: Route remainder to standard Circle Mint. - `cancel`: Drop the unfilled remainder. enum: - roll - fallback - cancel OrderStatus: type: string description: > Current lifecycle state of the order. - `pending`: Accepted and resting in the open auction. - `settling`: The auction has cleared; funds are moving. - `filled`: Fully matched and settled. - `partial_fill`: Partially matched; unfilled remainder handled per `postFillAction`. - `unfilled`: No fill received; handled per `postFillAction`. - `cancelled`: Cancelled before clearing or dropped by a `cancel` post-fill election. - `failed`: Settlement could not be completed. enum: - pending - settling - filled - partial_fill - unfilled - cancelled - failed OrderFill: type: object required: - filledAmount - unfilledAmount - clearingFeeBps - matchedAt properties: filledAmount: $ref: '#/components/schemas/Money' unfilledAmount: $ref: '#/components/schemas/Money' clearingFeeBps: type: string description: Actual clearing fee applied at settlement, in basis points example: '3' matchedAt: type: string format: date-time description: ISO 8601 timestamp when the auction cleared example: '2026-08-17T00:05:00Z' securitySchemes: BearerAuth: type: http scheme: bearer ````