| Time | Status | User Agent |  |
| :-- | :-- | :-- | :-- |
| Make a request to see history. |

#### URL Expired

The URL for this request expired after 30 days.

> 💡
>
> ### **Compute Unit Value**: `50` (fixed)   [Skip link to compute unit value documentation](https://docs.blockdaemon.com/reference/txestimatefee-txapi#compute-unit-value-50-fixed)

Fee estimation is integrated within the Transaction API and **is not a standalone endpoint.** When you send a transaction, the fee is automatically deducted from the sender's wallet.

**How It Works?**

It estimates the cost of sending a transaction, which can be either signed or unsigned. If unsigned, the estimation assumes the size of a single signature. The estimation includes:

- **Bandwidth**: The data size of the transaction.
- **Energy**: The computational resources needed if it's a smart contract transaction.
- **Additional Fees**: Any extra costs for specific contract types.

* * *

### Supported Protocols & Networks

| Protocol | Network | Path Parameter |
| --- | --- | --- |
| Stellar | Mainnet | `stellar-mainnet` |
| Testnet | `stellar-testnet` |
| Tron | Mainnet | `tron-mainnet` |
| Nile | `tron-nile` |

blockchain_id

string

required

Defaults to ethereum-mainnet

Either a hyphen separated protocol-network pair like `ethereum-mainnet` or the `chain-id`

Api Tx Estimate Fee Request Tron

Api Tx Estimate Fee Request Stellar

# ``200      OK

# ``401      Invalid or expired token

# ``429      Rate limit exceeded

# ``500      An internal server error happened

# ``501      The request endpoint is not implemented

# ``503      The resource you are trying to access is currently unavailable

Updated 2 months ago

* * *

ShellNodeRubyPHPPython

```

xxxxxxxxxx

curl --request POST \

--url https://svc.blockdaemon.com/tx/v1/ethereum-mainnet/estimate_fee \

--header 'X-API-Key: ••••' \

--header 'accept: application/json' \

--header 'content-type: application/json'
```

Click `Try It!` to start a request and see the response here! Or choose an example:

application/json

``200``401``429``500``501``503

Updated 2 months ago