> ## Documentation Index > Fetch the complete documentation index at: https://www.cashfree.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Create Payment > Use this API to initiate a payment transaction for an existing order using the order hash. This API processes the payment using the specified payment method and returns transaction details including redirect URLs for payment completion. ## OpenAPI ````yaml /openapi/payments/flowwise.yaml post /order/pay/{order_hash} openapi: 3.0.3 info: title: Flowwise Native API version: 1.0.0 description: > Manage orders, payments, refunds, and customers using the Flowwise Native API. [Source](https://cashfree.atlassian.net/wiki/spaces/ORC/pages/1084032020/API+Documentation) servers: - url: https://sandbox.flowwise.com/router description: Sandbox - url: https://app.flowwise.com/router description: Production security: - ApiKeyAuth: [] ApiSecret: [] paths: /order/pay/{order_hash}: post: summary: Create Payment description: > Use this API to initiate a payment transaction for an existing order using the order hash. This API processes the payment using the specified payment method and returns transaction details including redirect URLs for payment completion. parameters: - $ref: '#/components/parameters/OrderHash' requestBody: required: true description: Request parameters to create a new payment. content: application/json: schema: $ref: '#/components/schemas/CreatePaymentRequest' example: payment_method: upi payment_method_details: upi_id: priya.sharma@paytm app_name: PhonePe return_base_url: https://mystore.com/payment-success responses: '200': description: Success response for payment creation. content: application/json: schema: $ref: '#/components/schemas/CreatePaymentResponse' example: payment_id: pay_summer_fashion_001_upi order_id: order_summer_fashion_001 payment_method: upi payment_amount: 2299.5 payment_status: SUCCESS capture_status: SUCCESS capture_amount: 2299.5 processor_ref: UPI434512345678901234 redirect_url: >- https://payments.flowwise.com/redirect/pay_summer_fashion_001_upi return_url: >- https://mystore.com/payment-success?order_id=order_summer_fashion_001 payload: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9... payment_time: '2024-12-03T14:32:15Z' order_expiry_time: '2024-12-03T16:30:00Z' '400': description: Bad Request - Invalid payment request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: message: Invalid payment method details provided code: invalid_payment_method type: validation_error '401': description: Unauthorized - Invalid or missing authentication credentials content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: message: Invalid API credentials provided code: unauthorized type: authentication_error '404': description: Not Found - Order not found or expired content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: message: Order not found or has expired code: order_not_found type: resource_error '500': description: Internal Server Error - Payment processing failed content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: message: Payment processing failed due to server error code: payment_failed type: server_error security: - ApiKeyAuth: [] ApiSecret: [] components: parameters: OrderHash: name: order_hash in: path required: true description: Hash value for the order used for payment processing. schema: type: string example: a7f8e3d2c1b9f4e6d8a2c5b7f9e3d1a8 schemas: CreatePaymentRequest: type: object required: - payment_method - payment_method_details properties: payment_method: type: string enum: - upi - card - netbanking - wallet description: Payment method to be used for the transaction. example: upi payment_method_details: type: object description: >- Details specific to the payment method. For structure information, see the documentation. example: upi_id: priya.sharma@paytm app_name: PhonePe return_base_url: type: string format: uri description: >- Base URL where the customer will be redirected after payment completion. example: https://mystore.com/payment-success CreatePaymentResponse: type: object properties: payment_id: type: string description: Unique identifier for the payment transaction. example: pay_summer_fashion_001_upi order_id: type: string description: Unique identifier for the associated order. example: order_summer_fashion_001 payment_method: type: string description: Payment method used for the transaction. example: upi payment_amount: type: number description: Amount processed for the payment. example: 2299.5 payment_status: type: string description: Current status of the payment transaction. example: SUCCESS capture_status: type: string description: Status of the payment capture process. example: SUCCESS capture_amount: type: number description: Amount that has been captured from the payment. example: 2299.5 processor_ref: type: string description: Reference identifier from the payment processor. example: UPI434512345678901234 redirect_url: type: string format: uri description: URL to redirect the customer for payment completion. example: https://payments.flowwise.com/redirect/pay_summer_fashion_001_upi return_url: type: string format: uri description: URL where the customer will be redirected after payment completion. example: >- https://mystore.com/payment-success?order_id=order_summer_fashion_001 payload: type: string description: Additional payload data for the payment. example: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9... payment_time: type: string format: date-time description: Date and time when the payment was initiated. example: '2024-12-03T14:32:15Z' order_expiry_time: type: string format: date-time description: Date and time when the order expires. example: '2024-12-03T16:30:00Z' ErrorResponse: type: object description: Error response structure returned when an API request fails. properties: message: type: string description: Human-readable error message describing what went wrong. code: type: string description: Machine-readable error code for programmatic handling. type: type: string description: Category or type of error that occurred. required: - message - code - type securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-client-id description: >- Client app ID. You can find your app ID in the [Merchant Dashboard](https://merchant.cashfree.com/auth/login/pg/developers/api-keys?env=prod). ApiSecret: type: apiKey in: header name: x-client-secret description: >- Client secret key. You can find your secret key in the [Merchant Dashboard](https://merchant.cashfree.com/auth/login/pg/developers/api-keys?env=prod). ````