const response = await fetch('http://srpc.solapi.pro/?api_key=<api-key>', {
method: 'POST',
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify({
"jsonrpc": "2.0",
"id": "1",
"method": "getMaxShredInsertSlot"
}),
});
const data = await response.json();
{
"jsonrpc": "2.0",
"id": "1",
"result": 1234
}