function share_links() {
  const ssId= SpreadsheetApp.getActive().getId();
  const urls = ["url1", "url2", "url3"];
  urls.forEach(url => {
    Logger.log(addImportrangePermission(ssId, getIdFromUrl(url)));
  })
}

function addImportrangePermission(ssId, donorId) {
  const url = `https://docs.google.com/spreadsheets/d/${ssId}/externaldata/addimportrangepermissions?donorDocId=${donorId}`;
  const token = ScriptApp.getOAuthToken();
  const params = {
    method: 'post',
    headers: {
      Authorization: 'Bearer ' + token,
    },
    muteHttpExceptions: true
  };
  return UrlFetchApp.fetch(url, params);
}

function getIdFromUrl(url) {
  return url.match(/[-\w]{25,}/);
}