> ## Documentation Index > Fetch the complete documentation index at: https://guides.saber.money/llms.txt > Use this file to discover all available pages before exploring further. # Add Dummy Balance [Sandbox Only] > Creates a dummy crypto deposit record against a user's wallet so you can fund a sandbox user without a real on-chain transfer. Sandbox only, not available in production. Once the record is created, the credited balance is visible via [Get Wallet Balance](/api-reference/wallet-operations/get-wallet-balance). ## OpenAPI ````yaml openapi-v2.json POST /api/v2/wallet/transaction/create-crypto-deposit-record openapi: 3.1.0 info: title: Saber Money API (v2) version: v2 description: >- ## Authentication There is no standalone API-key auth — every request must be **signed**. An API key by itself authenticates nothing. Each call requires four headers together: `X-Api-Key` (your key), `X-Signature` (HMAC-SHA256 of `apiKey + timestamp` — or `apiKey + timestamp + userId` when `X-User-Id` is required — keyed with your API secret), `X-Timestamp` (unix seconds), and `X-Request-Id` (any unique string per request). The signature must be computed by a client script; there is no way to derive it by hand. Use the HMAC Generator flow to compute valid values for manual testing. ## Common Authentication Errors - **Invalid Client ID**: {"error_code":6092,"message":"X-Client-Id invalid","success":false} - **Invalid Secret**: {"error_code":6090,"message":"invalid secret","success":false} - **Timestamp (Older than 10 secs)**: {"errors":{"error_code":6093,"text":"timestamp expired"},"success":false} servers: - url: https://api.saber.money security: [] paths: /api/v2/wallet/transaction/create-crypto-deposit-record: post: tags: - Wallet Operations summary: Add Dummy Balance [Sandbox Only] description: >- Creates a dummy crypto deposit record against a user's wallet so you can fund a sandbox user without a real on-chain transfer. Sandbox only, not available in production. operationId: create-crypto-deposit-record-v2 parameters: - name: X-Api-Key in: header required: true description: Your API key (configured in credentials) schema: type: string - name: X-Signature in: header required: true description: >- HMAC-SHA256 signature (auto-generated) To test manually: HMAC-SHA256 of `apiKey + timestamp` (or `apiKey + timestamp + userId` when X-User-Id is required), keyed with your API secret. The HMAC Generator flow computes this for you. schema: type: string - name: X-Timestamp in: header required: true description: >- Unix timestamp in seconds (auto-generated) Unix seconds, e.g. `Math.floor(Date.now() / 1000)`. Must match the timestamp used in the X-Signature computation. schema: type: string - name: X-Request-Id in: header required: true description: >- Unique request identifier (auto-generated) Any unique string per request, e.g. a UUID. schema: type: string - name: X-User-Id in: header required: true description: UUID of the user receiving the balance. schema: type: string requestBody: required: true content: application/json: schema: type: object properties: user_id: type: string description: >- UUID of the user receiving the balance. Same value as X-User-Id. symbol: type: string description: Crypto asset to credit, e.g. `USDC`. amount: type: number description: Amount to credit. network: type: string description: Network the deposit is recorded on, e.g. `MATIC`. required: - user_id - symbol - amount - network example: user_id: 550e8400-e29b-41d4-a716-446655440000 symbol: USDC amount: 1 network: MATIC responses: '200': description: Successful response content: application/json: schema: type: object properties: success: type: boolean data: type: object properties: transaction_type: type: string enum: - EXTERNAL_SELL - POOL_SELL - SELL - BUY - POOL_BUY - EXTERNAL_BUY - DEPOSIT - CRYPTO_DEPOSIT - WITHDRAW - CRYPTO_WITHDRAW status: type: string enum: - CREATED - PAYMENT_INITIATED - FUNDS_RECEIVED - COMPLETED - FAILED - REFUND_INITIATED - REFUND_COMPLETED - REFUND_FAILED - PROCESSING - CANCELLED - APPROVAL_REQUIRED - SOURCE_INVALID - VERIFICATION_PENDING - PENDING - REVERTED - REJECTED - EXPIRED - SUCCESSFUL created_at: type: integer updated_at: type: integer id: type: string crypto_symbol: type: string fiat_symbol: type: string exchange_rate: type: - number - integer crypto_amount: type: - integer - number fiat_amount: type: - number - integer bank_transaction_id: type: string source_id: type: string user_id: type: string usd_value: type: integer deposit_crypto_address: type: string deposit_network: type: string destination_instrument_id: type: string amount: type: integer uuid: type: string symbol: type: string tag: type: string source_address: type: string address: type: string network: type: string txn_hash: type: string ```` ## Related topics - [Reset User [Sandbox Only]](/api-reference/user-operations/reset-user-sandbox-only.md) - [Reset KYC [Sandbox Only]](/api-reference/kyc-and-edd-operations/reset-kyc-sandbox-only.md) - [Reset Phone and Email [Sandbox Only]](/api-reference/user-operations/reset-phone-and-email-sandbox-only.md) - [Approve Bank Account [Sandbox Only]](/api-reference/bank-account-operations/approve-bank-account-sandbox-only.md) - [Through Saber Widget](/user/bank-account/widget.md)