> ## 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.

# Initiating Transaction

> Sell USDT or USDC for INR via bank transfer using Saber's fiat/sell or pool/sell endpoints, covering parameters and response fields.

Sell cryptocurrency (USDT or USDC) for fiat (currently INR) via bank transfer, using the fiat/sell endpoint.

## Initiate Sell Transaction

**Endpoint:**

Sell: `POST /api/v1/wallet/conversion/fiat/sell`

Pool Sell: `POST /api/wallet-services/v2/transaction/pool/sell`

**Sample request:**

```bash theme={null}
curl --location 'https://api.saber.money/api/v1/wallet/conversion/fiat/sell' \
  --header 'X-Timestamp: {{timestamp}}' \
  --header 'X-Client-Id: •••••••' \
  --header 'X-Secret-Key: •••••••' \
  --header 'X-Request-Id: {{request_id}}' \
  --header 'X-User-Id: •••••••' \
  --data '{
    "source_id": "65d246fc-6a5b-43d7-89bf-944e95ff2279",
    "fiat_symbol": "INR",
    "crypto_symbol": "USDT",
    "crypto_amount": 1.14,
    "payment_method": "bank_transfer"
  }'
```

**Sample response:**

```json theme={null}
{
  "success": true,
  "data": {
    "status": "CREATED",
    "fiat_amount": "100",
    "transaction_type": "SELL",
    "fiat_symbol": "INR",
    "failure_code": "",
    "exchange_rate": "0",
    "id": "a892dc4a-aecb-4a22-9de4-2990b4179b77",
    "crypto_symbol": "USDT",
    "created_at": 1664783475000,
    "failure_desc": "",
    "crypto_amount": "1.14"
  }
}
```

### Required Parameters

| Parameter        | Description                                                                |
| ---------------- | -------------------------------------------------------------------------- |
| `source_id`      | The unique wallet address ID of the user initiating the transaction.       |
| `fiat_symbol`    | Fiat currency to receive. Currently only `INR` is supported.               |
| `crypto_symbol`  | Crypto to sell — `USDT` or `USDC` (others available on request).           |
| `crypto_amount`  | Amount of crypto to sell. Required (Pool Sell may use `quote_id` instead). |
| `payment_method` | Must be `bank_transfer`.                                                   |

### Response Parameters

| Field                           | Description                                                                                                                                                       |
| ------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `success`                       | Whether the request succeeded.                                                                                                                                    |
| `status`                        | Transaction status — `CREATED`, `PENDING`, `COMPLETED`, etc.                                                                                                      |
| `fiat_amount`                   | Fiat amount, as a string. Monetary/rate fields (`fiat_amount`, `crypto_amount`, `exchange_rate`) are serialized as JSON strings — parse as decimals, not numbers. |
| `transaction_type`              | `SELL` for the standard endpoint, `POOL_SELL` for the pool endpoint.                                                                                              |
| `fiat_symbol`                   | Fiat currency symbol (`INR`).                                                                                                                                     |
| `exchange_rate`                 | Conversion rate, as a string. `"0"` at creation for standard Sell; populated for Pool Sell.                                                                       |
| `id`                            | Unique transaction ID.                                                                                                                                            |
| `crypto_symbol`                 | Crypto symbol sold (e.g. `USDT`).                                                                                                                                 |
| `crypto_amount`                 | Amount of crypto sold.                                                                                                                                            |
| `reason_code`                   | Present only when applicable.                                                                                                                                     |
| `created_at`                    | Unix epoch **milliseconds** (int64).                                                                                                                              |
| `failure_code` / `failure_desc` | Present only on failure; empty strings on success.                                                                                                                |

## Notes

* INR is currently the only supported fiat currency; `bank_transfer` the only payment method.
* Only USDT or USDC can be sold — other cryptocurrencies are available on request.
* Sell can also be initiated directly from the pool wallet through this API — the request body is the same, but see [Pool Sell transaction status](https://saber-money.readme.io/reference/post_api-v2-wallet-transaction-pool-sell) for the different create/status endpoints.

**API Reference:** [Create Sell Transaction](https://saber-money.readme.io/reference/createselltransaction)


## Related topics

- [Initiating Transaction](/onramp/operations/initiate-transaction.md)
- [Understanding the Platform](/getting-started/platform-intro.md)
- [Overview](/offramp/overview.md)
- [Traditional Rails](/offramp/currencies/inr-traditional.md)