I try to use example \"Read multiple ranges\":
https://sheets.googleapis.com/v4/spreadsheets/{SpreadsheetID}/values:batchGet?ranges=Sheet1!B:B&ran
In addition to @skamble89's answer, this 403 error is usually caused by incorrect or missed some configuration in Authorizing Requests. If you're authorizing requests with OAuth 2.0, make sure you use the proper scope with it.
Make sure you have a permission to call this spreadsheet and you enable the Sheets API in your developer console.