Gas Platform API

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MEV Relay Instructions for Ethereum Validators

Transaction Distribution Network

Onboard (older version)

Gas Platform API

Gas Platform is an industry leading product that leverages real-time mempool data to deliver transaction gasPrice distribution and precisely predict the gas price required to get into the next block.

Overview
Gas Platform provides access to:
Gas prices needed to have X% probability to qualify for inclusion in the next block. Need a high probability of being confirmed at the expense of spending extra gas? Use the 99% probability prediction. Don't mind if the tx takes 2-3 blocks if it saves some gas? Use the 70% probability prediction.
Estimated gas price distribution for the next block. Want a deeper look at live mempool gas statistics? Get a complete breakdown of gas prices in the mempool grouped by gwei.
Gas Platform currently supports Ethereum and Polygon/Matic mainnets. 
You can view an introductory video on Gas Platform here.
Authentication
A valid Blocknative apikey is required in the Authorization Header of every request.
Create an account and apikey here.
Ratelimits
Each endpoint is limited to provide updated results each second for paid tier apikeys, or every 5 seconds for free tier apikeys. Polling faster than these rates may deliver stale data.
​
get
https://api.blocknative.com
/gasprices/blockprices
blockprices
Example request
curl -H "Authorization: your-apikey-here" https://api.blocknative.com/gasprices/blockprices
Example custom confidence level request
curl -H "Authorization: your-apikey-here" https://api.blocknative.com/gasprices/blockprices?confidenceLevels=10&confidenceLevels=30&confidenceLevels=50&confidenceLevels=70&confidenceLevels=90
Example Response Payload
{
    "system": "ethereum",
    "network": "main",
    "unit": "gwei",
    "maxPrice": 120,
    "currentBlockNumber": 14630321,
    "msSinceLastBlock": 14653,
    "blockPrices": [
        {
            "blockNumber": 14630322,
            "estimatedTransactionCount": 224,
            "baseFeePerGas": 77.233467826,
            "estimatedPrices": [
                {
                    "confidence": 99,
                    "price": 79,
                    "maxPriorityFeePerGas": 2,
                    "maxFeePerGas": 109.93
                },
                {
                    "confidence": 95,
                    "price": 78,
                    "maxPriorityFeePerGas": 1.52,
                    "maxFeePerGas": 109.45
                },
                {
                    "confidence": 90,
                    "price": 78,
                    "maxPriorityFeePerGas": 1.5,
                    "maxFeePerGas": 109.43
                },
                {
                    "confidence": 80,
                    "price": 78,
                    "maxPriorityFeePerGas": 1.27,
                    "maxFeePerGas": 109.2
                },
                {
                    "confidence": 70,
                    "price": 78,
                    "maxPriorityFeePerGas": 1.07,
                    "maxFeePerGas": 109
                }
            ]
        }
    ],
    "estimatedBaseFees": [
        {
            "pending+1": [
                {
                    "confidence": 99,
                    "baseFee": 86.89
                }
            ]
        },
        {
            "pending+2": [
                {
                    "confidence": 99,
                    "baseFee": 97.74
                }
            ]
        },
        {
            "pending+3": [
                {
                    "confidence": 99,
                    "baseFee": 106.19
                }
            ]
        },
        {
            "pending+4": [
                {
                    "confidence": 99,
                    "baseFee": 105.99
                }
            ]
        },
        {
            "pending+5": [
                {
                    "confidence": 99,
                    "baseFee": 107.93
                }
            ]
        }
    ]
}
Type0 and Type2 Transactions
Type0 transactions (Pre EIP-1559) should utilize the Price number under each confidence level. Type2 transactions (EIP-1559) should utilize the values for maxPriorityFeePerGas (also known as the "tip") and maxFeePerGas .
Description of Terms
maxPrice
Highest priced transaction in the mempool
currentBlockNumber
Block number at the time of prediction
msSinceLastBlock
Milliseconds since the last block was mined relative to when data was computed
blockNumber
Block this prediction is for
baseFeePerGas
Base fee per gas for current block in gwei. (Only type2 transactions Post EIP-1559 have this value and it's burned by the network upon transaction success).
estimatedTransactionCount
Number of items we estimate will be included in next block based on mempool snapshot
estimatedPrices -> confidence
The likelihood the next block will contain a transaction with a price >= to the listed price
estimatedPrices -> price
Price in Gwei (used for type0 transactions: Pre EIP-1559)
estimatedPrices -> maxPriorityFeePerGas
Max priority fee per gas in gwei also known as the "tip" (used for type2 transactions: EIP-1559)
estimatedPrices -> maxFeePerGas
Max fee per gas in gwei (used for type2 transactions: EIP-1559). maxFeePerGas is computed from baseFeePerGas prediction 5 blocks after the current pending block + maxPriorityFeePerGas
estimatedBaseFees -> pending+n
The nth block after the current pending block for the associated baseFee prediction. Currently the next 5 blocks after the current pending block are provided
estimatedBaseFees -> confidence
The likelihood the specified future block will have a baseFee <= to the listed baseFee. Currently only the 99% confidence level is provided
estimatedBaseFees -> baseFee
The estimated baseFee of the specified future block (pending+n) at the indicated confidence level. Currently only the 99% confidence level is provided
get
https://api.blocknative.com
/gasprices/distribution
distribution
Pending transactions unlikely to be included in the next block due to poor nonce ordering are not included in distribution data
Example request
curl -H "Authorization: your-apikey-here" https://api.blocknative.com/gasprices/distribution

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Overview

Authentication

Ratelimits

get

blockprices

Example request

Example custom confidence level request

Example Response Payload

Description of Terms

get

distribution