getVersion

const response = await fetch('https://api.1inch.com/web3/501', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    Authorization: `Bearer ${API_KEY}`,
  },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'getVersion',
    params: [],
    id: 1,
  }),
});

const data = await response.json();
console.log(data);