Virtual Agent - Parse JSON response headers

Saumya Awasthi1 · Monday

Hi,

I have a requirement where I need to display the response headers from the JSON payload. I am implementing it in virtual agent. Scenario is:

1. Flow designer makes outbound rest call and stores the entire response body in a script variable 'response_body' in virtual agent.

response_body:

{
"queryId":"#snow_va_user_info",
"executedQuery":"session.logins | where user.ad.email_address == \"abc@abc.com\" | list device.name, user.ad.email_address , device.last_seen , device.entity , device.collector.uid , device.hardware.model , device.boot.days_since_last_full_boot , user.last_seen",
"rows":5,
"executionDateTime":{"year":2026,"month":4,"day":21,"hour":22,"minute":9,"second":33},
"headers":["device.name","user.ad.email_address","device.last_seen","device.entity","device.collector.uid","device.hardware.model","device.boot.days_since_last_full_boot","user.last_seen"],
"data":[
["USRRGBS","abc@abc.com","2026-04-21 18:34:17","USA-MO-Remote","7648adc4-2636-4e81-b366-00ac722c5","HP EliteBook 840 14 inch G11 Notebook PC",1,"2026-04-21 17:56:25"],

["USRRGBS","abc@abc.com","2026-04-21 18:34:17","USA-MO-Remote","7648adc4-2636-4e81-b366-00ac78202","HP EliteBook 840 14 inch G11 Notebook PC",1,"2026-04-21 17:56:25"],

["USRRGBS","abc@abc.com","2026-04-21 18:34:17","USA-MO-Remote","7648adc4-2636-4e81-b366-0082022c5","HP EliteBook 840 14 inch G11 Notebook PC",1,"2026-04-21 17:56:25"]

]
}

2. There is a script action step which will parse this data and extract the header part from the above string.

Script I am using:

(function execute() {

var parsedData = JSON.parse(JSON.stringify(vaVars.response_body));

var headers = parsedData.headers;

gs.info('headers are:' + headers);

var deviceNameIndex = headers.indexOf('device.name');

var deviceUidIndex = headers.indexOf('device.collector.uid');

gs.info('name index is ' + deviceNameIndex);

gs.info('uid index is ' + deviceUidIndex);

})()

Question: When I run this script, I am getting all 3 values as undefined under all 3 gs.info messages above. Can someone please suggest what am I doing wrong?

Thank you in advance!

vaishali231 · Monday

hey @Saumya Awasthi1

try this :

(function execute() {

    try {

        // Step 1: Get raw response
        var raw = vaVars.response_body;

        gs.info('VA Debug | Raw response type: ' + typeof raw);
        gs.info('VA Debug | Raw response value: ' + raw);

        // Step 2: Normalize to object (handle both STRING and OBJECT cases)
        if (!raw) {
            gs.error('VA Error | response_body is empty or null');
            return;
        }

        var parsedData;

        if (typeof raw === 'string') {
            parsedData = JSON.parse(raw);
        } else if (typeof raw === 'object') {
            parsedData = raw;
        } else {
            gs.error('VA Error | Unsupported response_body type');
            return;
        }

        // Step 3: Validate structure
        if (!parsedData.headers || !parsedData.data) {
            gs.error('VA Error | Invalid response structure: headers or data missing');
            gs.info('VA Debug | Parsed object: ' + JSON.stringify(parsedData));
            return;
        }

        // Step 4: Extract headers
        var headers = parsedData.headers;
        gs.info('VA Debug | Headers: ' + JSON.stringify(headers));

        // Step 5: Get index positions
        var deviceNameIndex = headers.indexOf('device.name');
        var deviceUidIndex = headers.indexOf('device.collector.uid');

        gs.info('VA Debug | device.name index: ' + deviceNameIndex);
        gs.info('VA Debug | device.collector.uid index: ' + deviceUidIndex);

        if (deviceNameIndex === -1 || deviceUidIndex === -1) {
            gs.error('VA Error | Required headers not found');
            return;
        }

        // Step 6: Extract data using header index
        var data = parsedData.data;
        var result = [];

        for (var i = 0; i < data.length; i++) {
            var row = data[i];

            result.push({
                device_name: row[deviceNameIndex],
                device_uid: row[deviceUidIndex]
            });
        }

        // Step 7: Log final result
        gs.info('VA Debug | Final extracted result: ' + JSON.stringify(result));

        // Step 8: Store result back to VA variable (optional)
        vaVars.extracted_devices = result;

    } catch (ex) {
        gs.error('VA Exception | ' + ex.message);
    }

})();

*************************************************************************************************************************************
If this response helps, please mark it as Accept as Solution and Helpful.
Doing so helps others in the community and encourages me to keep contributing.
Regards
Vaishali Singh