What scriptable OCR Software exists on OSX for a paperless office
OCRKit has both AppleScript support and a CLI. From their help page:


  AppleScript
  
  You can also script OCRKit to integrate it into your specific workflow.
  For example process incoming files, via shared folder, from MFP copy
   machine, etc. and simply tell OCRKit to open and thus process is via
  AppleScript:

tell application "OCRKit"
   -- the wonders of AppleScript POSIX path handling, ...
   open "Users:admin:Desktop:orderform.pdf"
   open POSIX path of "/Users/Admin/Desktop/orderform.pdf"
end tell 

  
  Command line
  
  Since OCRKit version 2.5 direct command line scripting is supported.
  This greatly simplifies the use of OCRKit in batch processing, allows
  to set more options and is also more robust and cross-platform than
  AppleSCript.

OCRKit.app/Contents/MacOS/OCRKit \ 
    --lang en | de | fr | es | ... \
    --format pdf | html | rtf | text \
    --no-progress \
    --output out-file in-file

  
  Since OCRKit version 16.9 additional command line options are supported:
  
  -r, --recursive directory
  
  
    Scan directory recursively for new files. Skips files from OCRKit, with text layer or vector graphics.
  
  
  --pattern "regex"
  
  
    Pattern used to match filenames during recursive scans. Defaults to %.pdf$, recommendation for TIFF is %.tiff?$
  
  
  --log file
  
  
    Write log file information and statistics during recursive scan to file.
  
  
  --password secret
  
  
    Use secret password to decrypt PDF files during batch processing.
  
  
  --test-run [ fast ]
  
  
    Only run test batch processing in test mode to test PDF files or to
    obtain page count to estimate total processing time. "fast" will only 
    check the first page of each file, instead of going thru all pages for 
    image and vector analyzation.
  
  
  --tag name
  
  
    Use extended attribute name to tag the processing state of files
    during batch processing. macos:OCRKit (%s) will use native macOS
    Finder tags instead, or simply macos:OCRKit not including the state 
    attribute. The order of the state attribute are: started, analyzed, 
    processed, and can also be encrypted.