> For the complete documentation index, see [llms.txt](https://docs.0xprocessing.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.0xprocessing.com/0xprocessing-api/binance-pay.md).

# Binance Pay

### Authorization

{% hint style="danger" %}
**Authentication Rule** The request must contain an **`APIKEY`** header with your API key. The key can be generated in the merchant dashboard under **Settings \ API .**
{% endhint %}

All requests must include the following header:

```http
APIKEY: your_api_key_here
Content-Type: application/x-www-form-urlencoded
```

***

{% content-ref url="/pages/zsjgOVVS4bdCc4boIcOq" %}
[Create Binance Pay Deposit](/0xprocessing-api/binance-pay/create-binance-pay-deposit.md)
{% endcontent-ref %}

{% content-ref url="/pages/dkJcXQW0pKj5xgKpu9ON" %}
[List Supported Coins (Binance Pay ID)](/0xprocessing-api/binance-pay/list-supported-coins-binance-pay-id.md)
{% endcontent-ref %}

{% content-ref url="/pages/q1XhEkCaHTyEskBfJmgd" %}
[Withdraw to Binance Pay ID](/0xprocessing-api/binance-pay/withdraw-to-binance-pay-id.md)
{% endcontent-ref %}

{% content-ref url="/pages/etUDXAqcEDgKWdHHZ2AY" %}
[List Coins for On-Chain Withdrawal](/0xprocessing-api/binance-pay/list-coins-for-on-chain-withdrawal.md)
{% endcontent-ref %}

{% content-ref url="/pages/ikmlUypdukphNnKO4XOk" %}
[On-Chain Withdrawal via Binance pay](/0xprocessing-api/binance-pay/on-chain-withdrawal-via-binance-pay.md)
{% endcontent-ref %}

{% content-ref url="/pages/tLiTkVfAL1iV2E3ltuit" %}
[Webhooks](/0xprocessing-api/binance-pay/webhooks.md)
{% endcontent-ref %}

***

### Important Notes

* **ExternalId Uniqueness**: The `ExternalId` must be unique per transaction in your system. It is used for idempotency — submitting the same `ExternalId` twice will return the existing transaction data instead of creating a duplicate.
* **txId Availability**: For on-chain withdrawals, `txId` is null while the transaction is pending. It is populated once the transaction is broadcast to the blockchain.
* **binanceId in Response**: The `binanceId` in the withdrawal response becomes available after Binance processes the request. It is null immediately after creation.
* Currency format for on-chain: Always use the exact name returned by `/BinanceOnchainWithdrawCoins` in the
   Currency field — including the network suffix, e.g. USDT (BEP20).
* Deposit flow: After calling `/binancepaydeposit`, redirect the client to the url field or display the qrLink. The client
   must complete payment in the Binance app.