# Network fees

Network fees are amounts that spenders may include in their on-chain transaction in order to have it included in a block. 

There are three network fee levels available for [coin withdrawal](https://developers.cryptopay.me/guides/payouts) transactions.

| network\_fee\_level | block | time         |
| ------------------- | ----- | ------------ |
| `slow`              | 7     | \~1 hour     |
| `average`           | 3     | \~30 minutes |
| `fast`              | 1     | \~10 minutes |

It is a very dynamic thing, therefore each level changes its value every minute in such a way as to guarantee that the transaction will be included in a specific block within a given time frame.

Use [this API endpoint](https://reference.cryptopay.me/#tag/Coin-withdrawals/operation/coin-withdrawals.list-network-fees) to get the list of network fee levels.

```javascript
[
  {
    "level": "fast", 
    "fee": "0.00005612", 
    "currency": "BTC"
  },
  {
    "level": "average", 
    "fee": "0.00004357", 
    "currency": "BTC"
  },
  {
    "level": "slow", 
    "fee": "0.00004162", 
    "currency": "BTC"
  }
]
```

The network fee level can be specified in a [`POST /api/coin_withdrawals`](https://reference.cryptopay.me/#tag/Coin-withdrawals/operation/coin-withdrawals.create) request body.

```javascript
  "address": "2N122JKRz52gokTmaVYNiMA43qvdSqnhLGV",
  "received_currency": "BTC",
  "network_fee_level": "fast"
```