ServiceNow

curl -X GET \
  'https://YOUR_INSTANCE.service-now.com/api/now/table/incident?sysparm_limit=1' \
  -H 'Accept: application/json' \
  -u 'serval.integration:YOUR_PASSWORD'

(function executeRule(current, previous /*null when async*/) {

    var tableName   = current.getValue('name');
    var elementType = current.getValue('element');

    // Validate: only Serval-managed records.
    // Replace 'serval.integration' with the user_name of your
    // Serval service account if it differs.
    var SERVAL_USER = 'serval.integration';

    var recordSysId = current.getValue('element_id');
    var parentRecord = new GlideRecord(tableName);
    if (!parentRecord.get(recordSysId)) {
        gs.warn('Serval webhook: parent record not found: '
                + tableName + '/' + recordSysId);
        return;
    }

    var openedBy = parentRecord.opened_by.user_name.toString();
    if (openedBy !== SERVAL_USER) {
        return;
    }

    // Build payload
    var instanceName = gs.getProperty('instance_name');
    var instanceUrl  = 'https://' + instanceName + '.service-now.com';

    var payload = {
        instance_url:  instanceUrl,
        table:         tableName,
        record_sys_id: recordSysId,
        number:        parentRecord.getValue('number'),
        comment: {
            sys_id:         current.getUniqueValue(),
            element:        elementType,
            value:          current.getValue('value'),
            sys_created_by: current.getValue('sys_created_by'),
            sys_created_on: current.getValue('sys_created_on')
        }
    };

    // Configuration
    // Replace the token value with the token provided by Serval.
    // For production, store this in a System Property
    // (e.g., x_serval.webhook_token) and retrieve it via
    // gs.getProperty('x_serval.webhook_token').
    var SERVAL_WEBHOOK_URL   = 'https://svwebhook.api.serval.com/servicenow/new-comment';
    var SERVAL_WEBHOOK_TOKEN = '<TOKEN_PROVIDED_BY_SERVAL>';

    try {
        var request = new sn_ws.RESTMessageV2();
        request.setEndpoint(SERVAL_WEBHOOK_URL);
        request.setHttpMethod('POST');
        request.setRequestHeader('Content-Type', 'application/json');
        request.setRequestHeader('X-Serval-Webhook-Token', SERVAL_WEBHOOK_TOKEN);
        request.setRequestBody(JSON.stringify(payload));

        // Run asynchronously so we don't block the user's transaction
        request.setEccParameter('skip_sensor', 'true');

        var response = request.executeAsync();

        gs.info('Serval webhook: sent ' + elementType + ' event for '
            + tableName + '/' + parentRecord.getValue('number')
            + ' (async)');
    } catch (e) {
        gs.error('Serval webhook: failed to send event: ' + e.message);
    }

})(current, previous);