Number of review links in a project

Hello!
Other than guessing and updating the page_size query when collecting review links, is there a way to find out how many review links exist in a project?

My follow up question is likely more about coding/computers in general and if I can restrict what review links I get using the api with a nice little if statement. For example, if I know I only want to get the links that were made since August 1st…

Thanks for reading!