Get the base fee history

Returns the base fee history of the specified blockchain network for the previous 500 blocks.

The base fee is a part of the EIP-1559 upgrade to the Ethereum network, and it represents the minimum price a user must pay for their transaction to be included in a block.

This method can be useful for applications that need to display or analyze the historical base fee data for a specific blockchain network.

GET https://gas.api.infura.io/networks/${chainId}/baseFeeHistory

Parameters

Path:

• chainId: string - ID of the chain to query

Returns

Array of historical base fees.

Example

Request

Include your API key and API key secret to authorize your account to use the APIs.

cURL

curl -X "GET"                     \
    -u <API-KEY>:<API-KEY-SECRET> \
    "https://gas.api.infura.io/networks/1/baseFeeHistory"

JavaScript

const axios = require("axios");

const apiKey = "<API-KEY>"; // Replace with your API key.
const apiKeySecret = "<API-KEY-SECRET>"; // Replace with your API key secret.

const Auth = Buffer.from(
    apiKey + ":" + apiKeySecret,
).toString("base64");

// The chain ID of the supported network.
const chainId = 1;

(async () => {
    try {
        const { data } = await axios.get(
            `https://gas.api.infura.io/networks/${chainId}/baseFeeHistory`,
            {
                headers: {
                    Authorization: `Basic ${Auth}`,
                },
            },
        );
        console.log("Base fee history:", data);
    } catch (error) {
        console.log("Server responded with:", error);
    }
})();

Response

[
    "14.585610312",
    "16.407222984",
    "16.687763116",
    "16.357094117",
    "15.82929799",
    "15.21546789",
    "17.113938208",
    "16.92324819",
    ...
]