Node.js

const apid = ''; // put your key here
const secretHex = ''; // put your secret here
const { createHmac } = require('crypto');

const invokeAPI = async () => {
    try {
        const parseHexString = (str) => {
            const result = [];
            while (str.length >= 2) {
                result.push(parseInt(str.substring(0, 2), 16));
                str = str.substring(2, str.length);
            }
            return Buffer.from(result);
        };

        const time = Math.floor(new Date() / 1000);
        const command = "{'command': 'test/copy/1', 'data1': 'THIS IS A TEST'}";
        const message = time + command;
        const secret = parseHexString(`${secretHex}`);
        const hmac = createHmac('sha1', secret).update(message);
        const hash = hmac.digest().toString('hex');
        const url = `https://survey.saysoforgood.com/API?apid=${apid}&time=${time}&hash=${hash}`;
        const params = {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: command,
        };

        const response = await fetch(url, params);

        if (!response.ok) {
            throw new Error(`API request failed with status ${response.status}`);
        }

        const data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error:', error);
    }
};

invokeAPI();