> ## Documentation Index > Fetch the complete documentation index at: https://docs.gate.com/llms.txt > Use this file to discover all available pages before exploring further. # Create Withdrawal Order > Create an OTC withdrawal order after obtaining a quote. ## Overview This page documents the `POST /withdraw/open/institution/otc/api/order/create` endpoint. The full schema, parameters, and examples are rendered from the linked OpenAPI definition above. ## Notes * Authentication uses the standard GatePay signed headers. * This page documents the standard merchant endpoint. * For shared signing rules, see [/global/api-reference/version/100/en/common/securityAndSignature](/global/api-reference/version/100/en/common/securityAndSignature). ## Usage Guidance * Create the order with a fresh quote token. * Make sure the bank account used in the request is already approved and available for settlement. * Store the expected fiat amount, fee fields (`tradeFee` / `feeCurrency` / `feeDetail`), and final settlement information for reconciliation. * Use callback plus detail query rather than relying on creation response alone. ## OpenAPI ````yaml global/api-reference/version/100/en/openapi/institution/otc-fiat-openapi.json POST /withdraw/open/institution/otc/api/order/create openapi: 3.1.0 info: title: GatePay OTC Fiat API description: Reference for OTC fiat withdrawal and deposit APIs. version: 2.1.0 servers: - url: https://openplatform.gateapi.io security: [] paths: /withdraw/open/institution/otc/api/order/create: post: summary: Create OTC Withdrawal Order description: Create an OTC withdrawal order after obtaining a quote. parameters: - $ref: '#/components/parameters/X-GatePay-Certificate-ClientId' - $ref: '#/components/parameters/X-GatePay-Signature' - $ref: '#/components/parameters/X-GatePay-Timestamp' - $ref: '#/components/parameters/X-GatePay-Nonce' - $ref: '#/components/parameters/X-GatePay-On-Behalf-Of' requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/WithdrawalCreateRequest' responses: '200': description: Success content: application/json: schema: $ref: '#/components/schemas/WithdrawalCreateOrderResponse' components: parameters: X-GatePay-Certificate-ClientId: name: X-GatePay-Certificate-ClientId in: header required: true schema: type: string description: Merchant application client ID used to identify the calling app. X-GatePay-Signature: name: X-GatePay-Signature in: header required: true schema: type: string description: >- HMAC signature generated from the request according to GatePay signing rules. X-GatePay-Timestamp: name: X-GatePay-Timestamp in: header required: true schema: type: string description: >- Millisecond timestamp; the difference from server time must not exceed 30 seconds. X-GatePay-Nonce: name: X-GatePay-Nonce in: header required: true schema: type: string description: Random nonce used together with the timestamp to prevent replay attacks. X-GatePay-On-Behalf-Of: name: X-GatePay-On-Behalf-Of in: header required: true schema: type: string description: >- Required delegated-subject header. Provide the initiating account ID for this request. For institution merchant APIs, this is typically the target sub-account ID; for institution charge and transfer APIs, it can be either an institution account ID or a sub-account ID. schemas: WithdrawalCreateRequest: type: object properties: quoteToken: type: string description: Quote token returned by the quote API. bankAccountId: type: string description: Destination bank account ID for fiat settlement. cryptoCurrency: type: string description: 'Cryptocurrency being sold. Currently supported: USDT, USDC.' fiatCurrency: type: string description: 'Fiat currency to be settled out. Currently supported: USD.' cryptoAmount: type: string description: Crypto amount for the withdrawal order. fiatAmount: type: string description: Expected fiat settlement amount. type: type: string description: Order type. Use SELL for off-ramp. clientOrderId: type: string description: Merchant-defined unique order ID. required: - quoteToken - bankAccountId - cryptoCurrency - fiatCurrency - cryptoAmount - fiatAmount - type - clientOrderId WithdrawalCreateOrderResponse: type: object properties: code: type: string description: Business response code. status: type: string description: Top-level request status. errorMessage: type: string description: Error message when the request fails. data: $ref: '#/components/schemas/WithdrawalCreateOrderData' description: Create off-ramp order result. WithdrawalCreateOrderData: type: object description: Create off-ramp order response data. properties: orderId: type: string description: Gate OTC order ID. clientOrderId: type: string description: Merchant order ID. status: type: string description: 'Order status. Values: PROCESSING, DISPATCHED, DONE, FAIL.' createTime: type: integer description: Order creation timestamp in milliseconds. tradeFee: type: string description: Total amount of all fee items. feeCurrency: type: string description: Currency in which each fee item is denominated. feeDetail: type: array description: Fee breakdown. items: $ref: '#/components/schemas/OtcQuoteFeeDetail' OtcQuoteFeeDetail: type: object properties: feeType: type: string description: >- Fee type: `BANK` fee charged by the bank channel, `GATE_PAY` Gate Pay service fee amount, `SUBSIDY` promotional amount deducted from charged fees. amount: type: string description: Amount for this fee item. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.