Network Fee Rates

curl --request GET \
     --url 'https://api.finrock.io/dac/v1/network-fee-rates?asset=BTC' \
     --header 'Authorization: Bearer {JWT}' \
     --header 'accept: application/json' \
     --header 'x-api-key: YOUR_API_KEY'

[
  {
    "id": "Slow",
    "fee_rate": 1.38,
    "unit": "Sat/Byte"
  },
  {
    "id": "Normal",
    "fee_rate": 1.83,
    "unit": "Sat/Byte"
  },
  {
    "id": "Fast",
    "fee_rate": 2.70,
    "unit": "Sat/Byte"
  }
]

[
  {
    "id": "Slow",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00001,
    "unit": "gwei"
  },
  {
    "id": "Normal",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00001,
    "unit": "gwei"
  },
  {
    "id": "Fast",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00003,
    "unit": "gwei"
  }
]

[
  {
    "id": "Slow",
    "rent": 4000000000000.000,
    "priority_fee_rate": 6400000,
    "unit": "microLamports"
  },
  {
    "id": "Normal",
    "rent": 4000000000000.000,
    "priority_fee_rate": 8000000,
    "unit": "microLamports"
  },
  {
    "id": "Fast",
    "rent": 4000000000000.000,
    "priority_fee_rate": 9600000,
    "unit": "microLamports"
  }
]

[
  {
    "id": "Normal",
    "energy_price": 100,
    "unit": "Sun",
    "fixed": true
  }
]

GET

dac

network-fee-rates

curl --request GET \
     --url 'https://api.finrock.io/dac/v1/network-fee-rates?asset=BTC' \
     --header 'Authorization: Bearer {JWT}' \
     --header 'accept: application/json' \
     --header 'x-api-key: YOUR_API_KEY'

[
  {
    "id": "Slow",
    "fee_rate": 1.38,
    "unit": "Sat/Byte"
  },
  {
    "id": "Normal",
    "fee_rate": 1.83,
    "unit": "Sat/Byte"
  },
  {
    "id": "Fast",
    "fee_rate": 2.70,
    "unit": "Sat/Byte"
  }
]

[
  {
    "id": "Slow",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00001,
    "unit": "gwei"
  },
  {
    "id": "Normal",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00001,
    "unit": "gwei"
  },
  {
    "id": "Fast",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00003,
    "unit": "gwei"
  }
]

[
  {
    "id": "Slow",
    "rent": 4000000000000.000,
    "priority_fee_rate": 6400000,
    "unit": "microLamports"
  },
  {
    "id": "Normal",
    "rent": 4000000000000.000,
    "priority_fee_rate": 8000000,
    "unit": "microLamports"
  },
  {
    "id": "Fast",
    "rent": 4000000000000.000,
    "priority_fee_rate": 9600000,
    "unit": "microLamports"
  }
]

[
  {
    "id": "Normal",
    "energy_price": 100,
    "unit": "Sun",
    "fixed": true
  }
]

MCP scope: dac.read The Network Fee Rates endpoint returns the current fee rates on the blockchain network for a given asset. Use it to build a fee selection UI, to run pre-flight checks before submitting high-value transactions, or to choose a fee_rate before you call Estimate Fee.

Fee Rate Units by Blockchain

Every blockchain family expresses fee rates in a different unit. Fee rates for an asset use the unit of its blockchain:

Blockchain	Example Assets	Fee Rate Unit
UTXO	BTC, LTC, DASH, DOGE, BCH	Sat/Byte
EVM	ETH, BSC, POL, BASE, ARB, AVAX	GWei
Tron	TRX	Sun
Ripple	XRP	Drop
Stellar	XLM	Stroop
Cardano	ADA	Lovelace
Solana	SOL	microLamports

For more on how network fees work, see Gas Fees.

Query Parameters

string

required

The asset to get network fee rates for. Use the id value from the Supported Assets list (e.g. BTC, ETH, USDT_ETH).

curl --request GET \
     --url 'https://api.finrock.io/dac/v1/network-fee-rates?asset=BTC' \
     --header 'Authorization: Bearer {JWT}' \
     --header 'accept: application/json' \
     --header 'x-api-key: YOUR_API_KEY'

Response

A successful request returns HTTP 200 with an array of fee rate tiers for the asset’s network. The fee fields depend on the blockchain: UTXO chains such as BTC return a single fee_rate, EVM chains such as ETH return base_fee_rate and priority_fee_rate, Solana returns rent and priority_fee_rate, and Tron returns a single fixed Normal tier with energy_price.

string

Fee rate tier: Slow, Normal, or Fast. TRX returns only Normal.

double

Current fee rate for this tier, in the unit given by unit. Returned for chains such as BTC.

double

Current network base fee, in the unit given by unit. Returned for EVM chains such as ETH.

double

Priority fee for this tier, in the unit given by unit. Returned for EVM chains such as ETH and for SOL.

double

Solana rent value, in the unit given by unit. Returned for SOL.

double

Price of one unit of energy, in the unit given by unit. Returned for TRX.

boolean

true if the fee rate is fixed by the network and cannot be adjusted. Returned for TRX.

string

Unit of the fee rates, for example Sat/Byte for BTC, gwei for ETH, microLamports for SOL, or Sun for TRX. See Fee Rate Units by Blockchain.

[
  {
    "id": "Slow",
    "fee_rate": 1.38,
    "unit": "Sat/Byte"
  },
  {
    "id": "Normal",
    "fee_rate": 1.83,
    "unit": "Sat/Byte"
  },
  {
    "id": "Fast",
    "fee_rate": 2.70,
    "unit": "Sat/Byte"
  }
]

[
  {
    "id": "Slow",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00001,
    "unit": "gwei"
  },
  {
    "id": "Normal",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00001,
    "unit": "gwei"
  },
  {
    "id": "Fast",
    "base_fee_rate": 0.30247,
    "priority_fee_rate": 0.00003,
    "unit": "gwei"
  }
]

[
  {
    "id": "Slow",
    "rent": 4000000000000.000,
    "priority_fee_rate": 6400000,
    "unit": "microLamports"
  },
  {
    "id": "Normal",
    "rent": 4000000000000.000,
    "priority_fee_rate": 8000000,
    "unit": "microLamports"
  },
  {
    "id": "Fast",
    "rent": 4000000000000.000,
    "priority_fee_rate": 9600000,
    "unit": "microLamports"
  }
]

[
  {
    "id": "Normal",
    "energy_price": 100,
    "unit": "Sun",
    "fixed": true
  }
]

Pass the rate you choose as fee_rate to Estimate Fee to see the total fee for a specific transaction. For UTXO chains, also pass amount, because the fee depends on transaction size.