[Ethereum] how can i find the contract name from the address using the etherscan API

You can do a get query through axios, which can fetch the ABI directly:

rpcEndpoint = `...`;
addressURL = `...`;

const axios = require("axios");
const Web3 = require("web3");
var web3 = new Web3(new Web3.providers.HttpProvider(rpcEndpoint));

async function main() {
  url =
    `http://api-kovan.etherscan.io/api?module=contract&action=getabi&address=` +
    addressURL +
    `&format=raw`;
  console.log("Get request at: ", url);

  res = await axios.get(url);
  console.log(res.data);
}
main();

Successful output:

 [{ inputs: [ [Object], [Object] ],
    name: 'withdraw',
    outputs: [],
    stateMutability: 'nonpayable',
    type: 'function' },
  ...
  { inputs: [],
    name: 'withdrawable',
    outputs: [ [Object] ],
    stateMutability: 'view',
    type: 'function' } ]

Unsuccessful output:

Contract source code not verified