Distribution API

Analysis of public pending gas price distributions.

The Blocknative Gas Distribution API gives you the distribution and breakdown of gas prices in the mempool at that moment in time.

Authentication

A valid Blocknative API key is required in the Authorization Header of every request. Request an API key here .

Rate Limits

Each endpoint is limited to provide updated results each second for paid tier API keys, or every 5 seconds for free tier API keys. Polling faster than these rates may deliver stale data.

API Endpoint

GET https://api.blocknative.com/gasprices/distribution

Get the gas prices of the highest n transactions eligible for inclusion in the next block. If n is not specified, it defaults to number of expected transactions in the next block.

Query Parameters

NameTypeDescription
chainidintegerThe ID of the chain from which gas data is being requested. Currently only Ethereum mainnet (chaind=1 and the default) is supported.

Headers

NameTypeDescription
AuthorizationstringValid paid tier apikey
{
    "system": "ethereum",
    "network": "main",
    "unit": "gwei",
    "maxPrice": Number, // Highest priced transaction eligible for inclusion in next block
    "currentBlockNumber": Number, // Block number at moment in time
    "msSinceLastBlock": Number, // Milliseconds since last block at time of capture
    "topNDistribution": {
        "distribution": [ // List of tuples [(price,count), ...], ordered by price
            [
                Number, // Price in "unit"
                Number // Transaction count with this price
            ],
            ...,
        ],
        "n": Number // Top N priced pending transactions included in this distribution
    }
}
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{
    "msg": "Authorization header must contain a valid apikey"
}
null
{ "msg": "Too Many Requests" }
null

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
null

Example Response

{
  "system": "ethereum",
  "network": "main",
  "unit": "gwei",
  "maxPrice": 26,
  "currentBlockNumber": 19720652,
  "msSinceLastBlock": 9775,
  "topNDistribution": {
    "distribution": [
      [15, 2],
      [14.162957017, 1],
      [11, 1],
      [7, 1],
      [5.162957017, 1],
      [5, 10],
      [4.162957017, 4],
      [4, 3],
      [3.162957017, 5],
      [3, 9],
      [2.162957017, 1],
      [2, 15],
      [1.162957017, 5],
      [1, 11],
      [0.194403241, 1],
      [0.162957017, 5]
    ],
    "n": 128
  }
}
javascript
Last update at: 2025/08/01 00:25:42