> ## 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. # Create Sell Transaction > Create a sell transaction from the user's wallet. **Response field values** | Field | Possible Values | | --- | --- | | `transaction_type` | `SELL` | | `status` | Typically `CREATED` immediately after creation | | `failure_code`, `failure_desc` | `null` until the transaction fails | ## OpenAPI ````yaml openapi-v2.json POST /api/v2/wallet/transaction/sell 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/sell: post: tags: - Offramp summary: Create Sell Transaction description: | Create a sell transaction from the user's wallet. **Response field values** | Field | Possible Values | | --- | --- | | `transaction_type` | `SELL` | | `status` | Typically `CREATED` immediately after creation | | `failure_code`, `failure_desc` | `null` until the transaction fails | operationId: create-user-sell-transaction-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: User UUID (set above) schema: type: string requestBody: required: true content: application/json: schema: type: object properties: source_id: type: string description: Source instrument id. fiat_symbol: type: string description: Fiat currency symbol. crypto_symbol: type: string description: Crypto currency symbol. fiat_amount: type: number description: Fiat amount to sell against. crypto_amount: type: number description: Crypto amount to sell. payment_method: type: string description: Payment method. uuid: type: string description: Optional client reference UUID. is_first_party: type: boolean description: Whether the transaction is a first-party transfer. required: - source_id - fiat_symbol - crypto_symbol - fiat_amount - crypto_amount - payment_method example: source_id: c41f7d27-781c-41da-b74c-278fe7202af5 fiat_symbol: INR crypto_symbol: USDT fiat_amount: 100 crypto_amount: 1.14 payment_method: bank_transfer uuid: dc605164-7974-4413-af93-243b346a4a06 responses: '200': description: Successful response content: application/json: schema: type: object properties: success: type: boolean data: type: object properties: status: type: string enum: - CREATED fiat_amount: type: integer transaction_type: type: string enum: - SELL fiat_symbol: type: string failure_code: type: - string - 'null' exchange_rate: type: number id: type: string crypto_symbol: type: string created_at: type: string bank_transaction_id: type: - string - 'null' source_id: type: string failure_desc: type: - string - 'null' crypto_amount: type: number example: success: true data: status: CREATED fiat_amount: 100 transaction_type: SELL fiat_symbol: INR failure_code: null exchange_rate: 82.56976 id: a892dc4a-aecb-4a22-9de4-2990b4179b77 crypto_symbol: USDT created_at: '2022-10-03 07:51:15' bank_transaction_id: null source_id: 65d246fc-6a5b-43d7-89bf-944e95ff2279 failure_desc: null crypto_amount: 1.14 '400': description: '`400001`: missing or invalid parameters' content: application/json: schema: type: object properties: success: type: boolean enum: - false errors: type: array items: type: object properties: code: type: - integer - string text: type: string example: success: false errors: - code: 400001 text: missing or invalid parameters '409': description: '`403004`: reference uuid already exists or is invalid' content: application/json: schema: type: object properties: success: type: boolean enum: - false errors: type: array items: type: object properties: code: type: - integer - string text: type: string example: success: false errors: - code: 400001 text: missing or invalid parameters '500': description: '`499999`: Something went wrong!' content: application/json: schema: type: object properties: success: type: boolean enum: - false errors: type: array items: type: object properties: code: type: - integer - string text: type: string example: success: false errors: - code: 400001 text: missing or invalid parameters ```` ## Related topics - [Initiating Transaction](/offramp/operations/initiate-transaction.md) - [Create External Sell](/api-reference/offramp/from-external-wallet/create-external-sell.md) - [Create Pool Sell Transaction](/api-reference/offramp/from-pool-wallet/create-pool-sell-transaction.md) - [Get Sell Transaction Details](/api-reference/offramp/from-user-wallet/get-sell-transaction-details.md) - [Get External Sell Transaction Details](/api-reference/offramp/from-external-wallet/get-external-sell-transaction-details.md)