In the Windows/Linux version — on of the oldest tools has been the ability to validate URLs. This tool generates a report providing the HTTP status codes returned for URLs in a record set. This didn’t make the initial migration — but has been added to the current OSX version of MarcEdit.
To find the resource, you open the main window and select the menu:
Once selected, if works a lot like the Windows/Linux version. You have two report types (HTML/XML), you can define a title field, you can also set the fields to check. By default, MarcEdit selects all. To change this — you just need to add each new field/subfield combination in a new line.
Questions, let me know.