> ## Documentation Index > Fetch the complete documentation index at: https://developer.wallbit.io/docs/llms.txt > Use this file to discover all available pages before exploring further. # Internal Operation > Allows moving funds between the checking (DEFAULT) account and the investment (INVESTMENT) account. Deposit: moves funds from DEFAULT to INVESTMENT to invest. Withdrawal: moves funds from INVESTMENT to DEFAULT to use the money. Requires complete investment KYC. ## OpenAPI ````yaml POST /api/public/v1/operations/internal openapi: 3.0.3 info: title: Wallbit Public API description: >- Wallbit Public API allows developers to integrate Wallbit functionality into their applications. Access account balances, view transaction history, and execute trades programmatically using API Keys. version: 1.0.0 contact: name: Wallbit API Support email: dev@wallbit.io servers: - url: https://api.wallbit.io description: Production server - url: http://localhost description: Local development server security: - apiKey: [] tags: - name: Balance description: Endpoints to retrieve account balances - name: Transactions description: Endpoints to retrieve transaction history - name: Trades description: Endpoints to execute trading operations - name: Fees description: >- Endpoints to retrieve fee configuration for the authenticated user (e.g. stock trading fees by subscription tier) - name: Account Details description: Endpoints to obtain bank account details - name: Wallets description: Endpoints to obtain wallet addresses - name: Rates description: Endpoints to retrieve fiat exchange rates from Wallbit - name: Assets description: Endpoints to query information about assets (stocks) and categories - name: Operations description: Endpoints for deposit and withdrawal investment operations - name: Cards description: Endpoints to block and unblock cards - name: API Key description: Endpoints to revoke the API key used for authentication paths: /api/public/v1/operations/internal: post: tags: - Operations summary: Perform internal operation (investment deposit or withdrawal) description: >- Allows moving funds between the checking (DEFAULT) account and the investment (INVESTMENT) account. Deposit: moves funds from DEFAULT to INVESTMENT to invest. Withdrawal: moves funds from INVESTMENT to DEFAULT to use the money. Requires complete investment KYC. operationId: internalOperation requestBody: required: true content: application/json: schema: type: object required: - currency - from - to - amount properties: currency: type: string description: Currency code example: USD from: type: string enum: - DEFAULT - INVESTMENT description: Source account example: DEFAULT to: type: string enum: - DEFAULT - INVESTMENT description: Destination account example: INVESTMENT amount: type: number format: float description: Amount to transfer minimum: 1 maximum: 999999 example: 100 examples: deposit: summary: Deposit to investment account value: currency: USD from: DEFAULT to: INVESTMENT amount: 100 withdrawal: summary: Withdrawal from investment account value: currency: USD from: INVESTMENT to: DEFAULT amount: 50 responses: '200': description: Operation completed successfully content: application/json: schema: $ref: '#/components/schemas/Transaction' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '412': description: Precondition Failed content: application/json: schema: $ref: '#/components/schemas/Error' examples: locked: summary: Account locked value: error: Your investment account is locked kyc-incomplete: summary: KYC incomplete value: error: You must complete investment KYC to perform this operation migrating: summary: Account migrating value: error: Your account is being migrated. Please try again later. '422': description: Validation error or insufficient funds content: application/json: schema: $ref: '#/components/schemas/Error' examples: insufficient-funds: summary: Insufficient funds value: error: Insufficient funds validation: summary: Validation error value: message: The given data was invalid. errors: amount: - The amount field is required. '429': $ref: '#/components/responses/TooManyRequests' security: - apiKey: [] components: schemas: Transaction: type: object properties: uuid: type: string format: uuid description: Transaction unique identifier type: type: string description: Transaction type example: WITHDRAWAL_LOCAL external_address: type: string nullable: true description: >- External address used for the transaction (for example, a name in WITHDRAWAL_LOCAL operations) example: Juan Perez source_currency: type: object properties: code: type: string alias: type: string dest_currency: type: object properties: code: type: string alias: type: string source_amount: type: number format: float description: Source amount dest_amount: type: number format: float description: Destination amount status: type: string description: Transaction status created_at: type: string format: date-time description: Creation timestamp comment: type: string nullable: true description: Optional comment Error: type: object properties: message: type: string description: Error message error: type: string description: Error description responses: Unauthorized: description: Missing or invalid API Key content: application/json: schema: $ref: '#/components/schemas/Error' examples: missing: summary: Missing API Key value: message: API Key required. Please provide X-API-Key header. invalid: summary: Invalid API Key value: message: Invalid or expired API Key. Forbidden: description: Insufficient permissions content: application/json: schema: type: object properties: message: type: string your_permissions: type: array items: type: string example: message: 'Insufficient permissions. Required permission: read' your_permissions: - trade TooManyRequests: description: Rate limit exceeded content: application/json: schema: type: object properties: message: type: string retry_after: type: integer description: Seconds until rate limit resets example: message: Too many requests. Please try again later. retry_after: 42 headers: X-RateLimit-Limit: description: Total requests allowed per minute schema: type: integer X-RateLimit-Remaining: description: Requests remaining in current window schema: type: integer X-RateLimit-Reset: description: Unix timestamp when rate limit resets schema: type: integer Retry-After: description: Seconds to wait before retry schema: type: integer securitySchemes: apiKey: type: apiKey name: X-API-Key in: header description: >- API Key authentication. Obtain your API key from the Wallbit dashboard under Settings → API Keys. ````