> ## Documentation Index > Fetch the complete documentation index at: https://docs.rinne.com.br/llms.txt > Use this file to discover all available pages before exploring further. # Add balance to merchant bank account (Sandbox Only) > Adds balance to a merchant's bank account for testing purposes. **This endpoint is only available in sandbox environment.** This endpoint allows developers to add test funds to merchant bank accounts for testing PIX payments and other banking operations. The account number is automatically retrieved from the merchant's active affiliation. ## OpenAPI ````yaml /api-spec.yaml post /v1/merchants/{merchantId}/balance openapi: 3.1.0 info: title: Rinne API version: 1.0.0 description: > **Rinne API** is a robust payment platform that offers integration with multiple payment providers. ## Authentication The API uses API Key authentication via the `x-api-key` header. Each company has a unique key to access resources. ## Response Format All responses follow a consistent format: - **Success**: Returns the requested data directly - **Error**: Returns an `error` object with detailed information ## Pagination Endpoints that return lists support pagination through parameters: - `page`: Page number (default: 1) - `limit`: Items per page (default: 20, maximum: 100) ## Supported Providers The API supports multiple payment providers: - **Rinne**: Internal provider - **Celcoin**: PIX integration and other financial services ## Raw Card Data (PCI Endpoints) Card credential fields (`card_data.number`, `card_data.cvv`, `card_data.network_token`, `card_data.cryptogram`, and the 3DS `card.number`) must always be sent encrypted — values start with the `ev:` prefix. Plaintext values are rejected with `400 VALIDATION_ERROR` on every host. There are two ways to send encrypted values: - **rinne-js**: card forms and wallet buttons (Apple Pay / Google Pay) encrypt credentials client-side before they leave the browser. - **PCI API host**: server-to-server integrations that handle raw card data must call `https://pci.api.rinne.com.br/core` (sandbox: `https://pci.api-sandbox.rinne.com.br/core`) instead of the regular host. This endpoint encrypts `number` and `cvv` in transit before the request reaches the API; all other fields pass through unchanged. The PCI host serves only transaction creation and 3DS session creation (both the self and merchant variants); use the regular host for everything else. contact: name: Rinne API Support email: suporte@rinne.com.br servers: - url: https://api-sandbox.rinne.com.br/core description: Sandbox - url: https://api.rinne.com.br/core description: Production security: [] tags: - name: System description: System and API health endpoints - name: Authentication description: User authentication and authorization endpoints - name: Management description: >- Merchant management endpoints - create, list, get specific, overview, update - name: Transactions description: Transaction operations for merchants - create, list, overview, refunds - name: Affiliations description: Affiliation management for merchants - name: Banking description: Banking operations for merchants - balance, cashout, statements - name: Bank Accounts description: Bank account management for merchants - name: Pix Keys description: PIX key management for merchants - name: Company Transactions description: Direct transaction management and query endpoints for companies - name: Companies description: Company management - name: Company Affiliations description: Payment provider affiliation management - name: Company Banking description: Company banking endpoints (balance, etc.) - name: Company Pix description: Company PIX key management - name: Company Ledger description: Company ledger entry query endpoints - name: Ledger description: Ledger entry query endpoints (company and merchants) - name: Cards description: Stored card management (self and merchant) - name: Webhooks description: Endpoints for receiving webhooks from external providers - name: Pricing description: Fee and cost policy management for transaction pricing - name: Users description: User management endpoints - name: Roles description: Role management endpoints - name: Permissions description: Permission management endpoints paths: /v1/merchants/{merchantId}/balance: post: tags: - Banking summary: Add balance to merchant bank account (Sandbox Only) description: > Adds balance to a merchant's bank account for testing purposes. **This endpoint is only available in sandbox environment.** This endpoint allows developers to add test funds to merchant bank accounts for testing PIX payments and other banking operations. The account number is automatically retrieved from the merchant's active affiliation. parameters: - name: merchantId in: path required: true description: Merchant/Company ID schema: type: string example: 123e4567-e89b-12d3-a456-426614174000 requestBody: required: true content: application/json: schema: type: object required: - amount properties: provider: type: string description: >- Banking provider (defaults to CELCOIN. Accepts lowercase and uppercase) default: CELCOIN example: CELCOIN amount: type: integer minimum: 1 description: Amount to add in cents example: 10000 responses: '200': description: Balance added successfully content: application/json: schema: type: object properties: status: type: string enum: - PROCESSING - CONFIRMED - ERROR example: CONFIRMED request_id: type: string example: f9b978a6-ab7e-4460-997d-1234567890ab '400': description: Validation error content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' '401': description: Unauthorized - Invalid or missing API key content: application/json: schema: $ref: '#/components/schemas/AuthenticationErrorResponse' '404': description: Merchant, affiliation, or bank account not found content: application/json: schema: $ref: '#/components/schemas/NotFoundErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/InternalServerErrorResponse' security: - ApiKeyAuth: [] components: schemas: ValidationErrorResponse: type: object properties: error: type: object properties: code: type: string example: VALIDATION_ERROR message: type: string example: Validation error status: type: integer example: 400 details: type: object properties: issues: type: array items: type: object properties: field: type: string example: email type: type: string example: REQUIRED message: type: string example: Field 'email' is required value: anyOf: - type: string - type: number - type: boolean example: invalid_value constraints: type: object example: min: 18 max: 120 path: type: string example: /companies timestamp: type: string format: date-time example: '2023-12-01T10:00:00.000Z' requestId: type: string example: req_123456789 AuthenticationErrorResponse: type: object properties: error: type: object properties: code: type: string example: AUTHENTICATION_ERROR message: type: string example: Authentication required to access this resource status: type: integer example: 401 details: type: object properties: reason: type: string example: Invalid API key path: type: string example: /companies/me timestamp: type: string format: date-time example: '2023-12-01T10:00:00.000Z' requestId: type: string example: req_123456789 NotFoundErrorResponse: type: object properties: error: type: object properties: code: type: string example: RESOURCE_NOT_FOUND message: type: string example: Company with ID '123' not found status: type: integer example: 404 path: type: string example: /companies/me timestamp: type: string format: date-time example: '2023-12-01T10:00:00.000Z' requestId: type: string example: req_123456789 InternalServerErrorResponse: type: object properties: error: type: object properties: code: type: string example: INTERNAL_SERVER_ERROR message: type: string example: An unexpected error occurred status: type: integer example: 500 path: type: string example: /companies timestamp: type: string format: date-time example: '2023-12-01T10:00:00.000Z' requestId: type: string example: req_123456789 securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: Company API key for authentication ````