> ## Documentation Index > Fetch the complete documentation index at: https://devdraft.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Create a stable payment intent > Creates a new stable payment intent for stablecoin-to-stablecoin transfers. This endpoint allows you to create payment intents for transfers between different stablecoins and networks. Perfect for cross-chain stablecoin swaps and conversions. ## Use Cases - USDC to EURC conversions - Cross-chain stablecoin transfers (e.g., Ethereum USDC to Polygon USDC) - Flexible amount payment intents for dynamic pricing ## Example: USDC to EURC Conversion ```json { "sourceCurrency": "usdc", "sourceNetwork": "ethereum", "destinationCurrency": "eurc", "destinationNetwork": "polygon", "destinationAddress": "0x742d35Cc6634C0532925a3b8D4C9db96c4b4d8e1", "amount": "100.00", "customer_first_name": "John", "customer_last_name": "Doe", "customer_email": "john.doe@example.com" } ``` ## Flexible Amount Payments Omit the `amount` field to create a flexible payment intent where users can specify the amount during payment. ## Idempotency Include an `idempotency-key` header with a unique UUID v4 to prevent duplicate payments. Subsequent requests with the same key will return the original response. ## OpenAPI ````yaml /swagger.yml post /api/v0/payment-intents/stablecoin openapi: 3.0.0 info: title: Devdraft AI Payment & Business Management API description: >- A comprehensive payment processing and business management API that enables seamless integration of cryptocurrency and traditional payment methods. version: 1.0.0 contact: {} servers: - url: https://api.devdraft.ai description: Production Server security: [] tags: [] paths: /api/v0/payment-intents/stablecoin: post: tags: - Payment Intents summary: Create a stable payment intent description: >- Creates a new stable payment intent for stablecoin-to-stablecoin transfers. This endpoint allows you to create payment intents for transfers between different stablecoins and networks. Perfect for cross-chain stablecoin swaps and conversions. ## Use Cases - USDC to EURC conversions - Cross-chain stablecoin transfers (e.g., Ethereum USDC to Polygon USDC) - Flexible amount payment intents for dynamic pricing ## Example: USDC to EURC Conversion ```json { "sourceCurrency": "usdc", "sourceNetwork": "ethereum", "destinationCurrency": "eurc", "destinationNetwork": "polygon", "destinationAddress": "0x742d35Cc6634C0532925a3b8D4C9db96c4b4d8e1", "amount": "100.00", "customer_first_name": "John", "customer_last_name": "Doe", "customer_email": "john.doe@example.com" } ``` ## Flexible Amount Payments Omit the `amount` field to create a flexible payment intent where users can specify the amount during payment. ## Idempotency Include an `idempotency-key` header with a unique UUID v4 to prevent duplicate payments. Subsequent requests with the same key will return the original response. operationId: PaymentIntentController_createStablePaymentIntent parameters: - name: idempotency-key in: header description: Unique UUID v4 for idempotent requests. Prevents duplicate payments. required: true schema: type: string requestBody: required: true description: Stable payment intent creation data content: application/json: schema: $ref: '#/components/schemas/CreateStablePaymentIntentDto' responses: '201': description: Stable payment intent created successfully content: application/json: example: id: txn_01HZXK8M9N2P3Q4R5S6T7U8V9W bridge_transfer_id: transfer_abc123xyz456 state: pending amount: '100.00' source: payment_rail: ethereum currency: usdc destination: payment_rail: polygon currency: eurc to_address: '0x742d35Cc6634C0532925a3b8D4C9db96c4b4d8e1' customer: first_name: John last_name: Doe email: john.doe@example.com address: 123 Main St, New York, NY 10001 country: United States phone_number: +1-555-123-4567 created_at: '2023-07-01T12:00:00.000Z' updated_at: '2023-07-01T12:00:00.000Z' '400': description: Bad Request - Invalid input data '401': description: Unauthorized - Invalid API credentials '404': description: Not Found - App not found '409': description: Conflict - Idempotency key already used with different parameters security: - x-client-secret: [] - x-client-key: [] components: schemas: CreateStablePaymentIntentDto: type: object properties: sourceCurrency: description: >- The stablecoin currency to convert FROM. This is the currency the customer will pay with. example: usdc allOf: - $ref: '#/components/schemas/StableCoinCurrency' sourceNetwork: description: >- The blockchain network where the source currency resides. Determines gas fees and transaction speed. example: ethereum allOf: - $ref: '#/components/schemas/BridgePaymentRail' destinationCurrency: description: >- The stablecoin currency to convert TO. If omitted, defaults to the same as source currency (cross-chain transfer). example: eurc allOf: - $ref: '#/components/schemas/StableCoinCurrency' destinationNetwork: description: >- The blockchain network where the converted currency will be delivered. Must support the destination currency. example: polygon allOf: - $ref: '#/components/schemas/BridgePaymentRail' destinationAddress: type: string description: >- The wallet address where converted funds will be sent. Supports Ethereum (0x...) and Solana address formats. example: '0x742d35Cc6634C0532925a3b8D4C9db96c4b4d8e1' amount: type: string description: >- Payment amount in the source currency. Omit for flexible amount payments where users specify the amount during checkout. example: '100.50' pattern: ^\d+(\.\d{1,6})?$ minimum: 0.01 customer_first_name: type: string description: >- Customer's first name. Used for transaction records and compliance. Required for amounts over $1000. example: John maxLength: 100 customer_last_name: type: string description: >- Customer's last name. Used for transaction records and compliance. Required for amounts over $1000. example: Doe maxLength: 100 customer_email: type: string description: >- Customer's email address. Used for transaction notifications and receipts. Highly recommended for all transactions. example: john.doe@example.com format: email maxLength: 255 customer_address: type: string description: >- Customer's full address. Required for compliance in certain jurisdictions and high-value transactions. example: 123 Main St, New York, NY 10001 maxLength: 500 customer_country: type: string description: >- Customer's country of residence. Used for compliance and tax reporting. example: United States maxLength: 100 customer_countryISO: type: string description: >- Customer's country ISO 3166-1 alpha-2 code. Used for automated compliance checks. example: US pattern: ^[A-Z]{2}$ maxLength: 2 customer_province: type: string description: >- Customer's state or province. Required for US and Canadian customers. example: New York maxLength: 100 customer_provinceISO: type: string description: >- Customer's state or province ISO code. Used for automated tax calculations. example: NY maxLength: 10 phoneNumber: type: string description: >- Customer's phone number with country code. Used for SMS notifications and verification. example: +1-555-123-4567 pattern: ^[+]?[\d\s\-\(\)]+$ maxLength: 20 required: - sourceCurrency - sourceNetwork - destinationNetwork StableCoinCurrency: type: string enum: - usdc - eurc description: >- The stablecoin currency to convert FROM. This is the currency the customer will pay with. BridgePaymentRail: type: string enum: - ethereum - solana - polygon - avalanche_c_chain - base - arbitrum - optimism - stellar - tron - bridge_wallet - wire - ach - ach_push - ach_same_day - sepa - swift - spei description: >- The blockchain network where the source currency resides. Determines gas fees and transaction speed. securitySchemes: x-client-secret: type: apiKey in: header name: x-client-secret description: >- Your secret API key. Keep this secure and never expose it in client-side code. x-client-key: type: apiKey in: header name: x-client-key description: Your unique client API key. Obtain this from your Devdraft AI dashboard. ````