Financials
Katana: L1 Fees
An OP Stack fee meant to estimate the costs associated with posting data to the L1 that is attributed to the user’s transaction fee
GET
/
v1
/
metrics
/
transaction-l1-fee-total-native
Transaction L1 Fee Total Native
curl --request GET \
--url https://api.blockworks.com/v1/metrics/transaction-l1-fee-total-native \
--header 'x-api-key: <api-key>'import requests
url = "https://api.blockworks.com/v1/metrics/transaction-l1-fee-total-native"
headers = {"x-api-key": "<api-key>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {'x-api-key': '<api-key>'}};
fetch('https://api.blockworks.com/v1/metrics/transaction-l1-fee-total-native', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));{
"projectName": [
{
"date": "2025-08-10",
"value": 123456.789
},
{
"date": "2025-08-11",
"value": 234567.89
},
{
"date": "2025-08-12",
"value": 345678.901
}
]
}Overview
- Denomination: ETH
- Type: Decimal
- Interval: Daily
- Source: Blockworks
Example Request
curl -H "x-api-key: YOUR_API_KEY" \
"https://api.blockworks.com/v1/metrics/transaction-l1-fee-total-native?project=katana"
const res = await fetch(
'https://api.blockworks.com/v1/metrics/transaction-l1-fee-total-native?project=katana',
{ headers: { 'x-api-key': 'YOUR_API_KEY' } }
)
const data = await res.json()
import requests
r = requests.get(
'https://api.blockworks.com/v1/metrics/transaction-l1-fee-total-native',
headers={'x-api-key': 'YOUR_API_KEY'},
params={'project': 'katana'}
)
data = r.json()
Example Response
{
"katana": [
{
"date": "2026-04-19",
"value": 0.0017677193884804237
},
{
"date": "2026-04-18",
"value": 0.0013912756675250337
},
{
"date": "2026-04-17",
"value": 0.0012899173022369763
},
{
"date": "2026-04-16",
"value": 0.00023071772597078297
},
{
"date": "2026-04-15",
"value": 0.000150125833169962
}
]
}
Notes
- Intervals are daily unless otherwise noted.
- Data is updated daily and may be revised after late-arriving data.