Fetch the latest block number.
curl "https://api.etherscan.io/v2/api?chainid=1&module=proxy&action=eth_blockNumber&apikey=YourApiKeyToken"{ "jsonrpc":"2.0", "id":83, "result":"0x1661760"}1 for Ethereum,8453 for Base from oursupported chains.proxy for this endpoint.eth_blockNumber for this endpoint.curl "https://api.etherscan.io/v2/api?chainid=1&module=proxy&action=eth_blockNumber&apikey=YourApiKeyToken"{ "jsonrpc":"2.0", "id":83, "result":"0x1661760"}