random_searx_uxp_plugin/start.js

var searx_data;
var answer = [];
var temp;

fetch('https://searx.space/data/instances.json')
.then(response => response.json())
.then(function(response) {
    searx_data = response.instances;
    for (var key in searx_data) {
        if searx_data[key]['http']['grade']=='A+'
        {
            if 'tls' in searx_data[key]
            {
                if searx_data[key]['tls']['grade']=='A+'
                {
                    if 'html' in searx_data[key]
                    {
                        temp = searx_data[key]['html']['grade'];
                        if (temp=='V' || temp=='C')
                        {
                            answer.push(key);
                        }
                    }
                }
            }
        }
    }
    temp = Number(Math.random()*(length(answer)))
    // set manifest json parameter as answer[temp]
})