> ## Documentation Index > Fetch the complete documentation index at: https://developer.meow.com/llms.txt > Use this file to discover all available pages before exploring further. # Simulate Inbound Transfer > > ⚠️ **Sandbox & development only.** Simulation endpoints are not available in production and return `404 Not Found` there. Simulates an inbound ACH, wire, RTP, or FedNow transfer into a cash account in the sandbox. Only cash accounts support this simulation. ## OpenAPI ````yaml POST /simulations/inbound_transfers openapi: 3.1.0 info: title: Meow API description: > ## Overview The Meow API provides financial services and billing capabilities for your business. ### Core Features - **Financial data access**: access account information, transactions, balances, and payment networks. - **Crypto operations**: create and manage crypto contacts, and initiate USDC transfers across blockchain networks. ### Billing API The Billing API lets you create and manage invoices and collect payments: - **Product management**: create and manage products with custom pricing. - **Customer management**: maintain invoicing customers with their addresses. - **Invoice creation**: generate invoices with line items, discounts, and custom notes. - **Payment options**: accept payments via ACH, wire, international wire, card, and USDC. - **Collection accounts**: configure accounts for payment collection. ### Getting Started Authenticate by sending your API key in the `x-api-key` request header. To scope requests to a specific entity, include the `x-entity-id` header. Use the `/api-keys/accessible-entities` endpoint to list all entities accessible by your API key. ### Error Responses Errors return JSON with `code`, `message`, and `debug_message`. The `code` aligns with FDX where possible; use `debug_message` for troubleshooting only. Common error codes: - `500`: Internal server error - `501`: Subsystem unavailable - `503`: Scheduled maintenance - `601`: Data not found - `602`: Customer not authorized - `701`: Account not found - `703`: Invalid input (including invalid date ranges) - `704`: Account type not supported - `705`: Account is closed - `801`: Transaction not found contact: name: Meow url: https://meow.com/ email: support@meow.com version: 1.0.0 license: name: Proprietary url: https://www.meow.com/terms-of-service servers: - url: https://api.meow.com/v1 description: Meow API Production - url: https://api.sandbox.meow.com/v1 description: Meow API Sandbox security: - apiKeyAuth: [] tags: - name: API Keys description: Retrieve metadata about API keys and their accessible entities. - name: Accounts description: Access and manage accounts. - name: Approvals - name: Balances description: Retrieve account balances and available funds. - name: Bills description: View and manage bills for vendor payments. - name: Cards description: Manage virtual and physical cards, and view transactions and insights. - name: Collection Accounts description: Manage accounts for payment collection. - name: Contacts description: Manage contacts for crypto and USDC transfers. - name: Customers description: Manage invoicing customers and their details. - name: Entities - name: Invoices description: Create and manage invoices. - name: Limits - name: Line Items description: Manage invoice line items. - name: Partner Onboarding description: Onboard entities using your partner API key. - name: Partner Webhooks - name: Payment Methods description: View available payment method types. - name: Payment Networks description: Manage payment networks and routing information. - name: Products description: Manage products and pricing for invoicing. - name: Routing Numbers description: Validate routing numbers and retrieve bank information. - name: Security Policies - name: Simulations description: >- Trigger simulated events — inbound transfers, card authorizations, application approval — to test integrations end-to-end without real money movement. **Not available in production**: these endpoints exist only in sandbox and development environments and return `404 Not Found` in production. - name: Tax Forms description: Retrieve IRS tax forms (1099 family) issued for accounts. - name: Transactions description: Retrieve account transaction history and details. - name: Transfers description: >- Initiate ACH, wire, book, and crypto transfers, and retrieve transfer details. - name: Webhooks description: Manage webhook subscriptions and inspect delivery history. paths: /simulations/inbound_transfers: post: tags: - Simulations summary: Simulate Inbound Transfer description: >- > ⚠️ **Sandbox & development only.** Simulation endpoints are not available in production and return `404 Not Found` there. Simulates an inbound ACH, wire, RTP, or FedNow transfer into a cash account in the sandbox. Only cash accounts support this simulation. operationId: simulate_inbound_transfer_simulations_inbound_transfers_post parameters: - $ref: '#/components/parameters/EntityIdHeader' requestBody: content: application/json: schema: $ref: '#/components/schemas/SimulateInboundTransferRequest' required: true responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/SimulateInboundTransferResponse' '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' security: - apiKeyAuth: - simulations:write components: parameters: EntityIdHeader: name: x-entity-id in: header required: false schema: type: string format: uuid description: Optional `entity_id` to scope requests to a specific entity. schemas: SimulateInboundTransferRequest: properties: account_id: type: string title: Account Id description: >- The cash account ID, exactly as returned by the list accounts endpoint (for example, `cash_account_`). rail: $ref: '#/components/schemas/SimulatedInboundRail' amount: anyOf: - type: number maximum: 20000000 exclusiveMinimum: 0 - type: string pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d{0,2}0*$ title: Amount type: object required: - account_id - rail - amount title: SimulateInboundTransferRequest SimulateInboundTransferResponse: properties: account_id: type: string title: Account Id amount: type: string pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ title: Amount rail: $ref: '#/components/schemas/SimulatedInboundRail' status: $ref: '#/components/schemas/SimulatedTransferStatus' type: object required: - account_id - amount - rail - status title: SimulateInboundTransferResponse HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError SimulatedInboundRail: type: string enum: - ach - wire - rtp - fednow title: SimulatedInboundRail x-enum-varnames: - ach - wire - rtp - fednow SimulatedTransferStatus: type: string enum: - submitted title: SimulatedTransferStatus x-enum-varnames: - submitted ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type type: object required: - loc - msg - type title: ValidationError securitySchemes: apiKeyAuth: type: apiKey in: header name: x-api-key description: Your Meow API key, sent in the `x-api-key` header for authentication. x-scopes: - accounts:read - accounts:write - accounts:payment-networks - accounts:transactions - accounts:balances - accounts:statements - accounts:tax-documents - entity:create - transfers:crypto:write - transfers:usdc:write - transfers:ach:write - transfers:wire:write - transfers:book:write - contacts:read - contacts:write - billing:products:read - billing:products:write - billing:customers:read - billing:customers:write - billing:invoices:read - billing:invoices:write - billing:accounts:read - billpay:read - billpay:write - onboarding:read - onboarding:write - cards:read - cards:write - webhooks:read - webhooks:write - partner:onboarding:read - partner:onboarding:write - partner:webhooks:read - partner:webhooks:write - simulations:write - banking:limits:read - banking:limits:write ````