This is a PRO endpoint, available to any paid tier
This historical endpoint is throttled to 2 calls/s
Query Parameters
Your Etherscan API key.
Chain ID to query, eg
1 for Ethereum, 8453 for Base from our supported chains.Set to
account for this endpoint.Set to
tokenbalancehistory for this endpoint.Contract address of the ERC-20 token.
Address to check for balance.
Block number to check balance for.