[Aqua77]

Всё делаю как в доках https://tinypng.com/developers/reference

let img = fs.readFileSync('public/img/logo.jpg');


var options = {
    body: img,
    headers: {
        Authorization: `Basic ${new Buffer.from(`api:<my API>`).toString('base64')}`,
    },
    method: 'POST',
    hostname: 'api.tinify.com',
    path: '/shrink'
  };

https.request(options, function(res,req){
    var data = '';
    res.on('data', function(chunk){
        data += chunk;
    });
    res.on('end', function(e){
        console.log(data);
    });
}).end();

Консоль пишет: {"error":"InputMissing","message":"Input file is empty"}