Hi Maximilian, 

Welcome to Box community!

There are currently a few distinct rate limits in place within the Box API.

• General API calls
  
  • 1000 API requests per minute, per user
  
  


• Uploads
  
  • 240 file upload requests per minute, per user
  
  


• Search
  
  • 6 searches per second, per user, to the search endpoint
    
  
  
  • Two additional limits are applied on top of the basic rate limit
    
    • 60 searches per minute, per user
    
    
    • 12 searches per second, per enterprise
    
    
  
  


• Box Sign
  
  • Create and resend sign request: 100 requests per minute, per user
  
  
  • Get sign request: 1000 requests per minute, per user
  
  

Reference: https://developer.box.com/guides/api-calls/permissions-and-errors/rate-limits/ 

If you have further questions regarding API limit, I highly recommend to post your inquiry to https://community.box.com/box-platform-5

Thank you for posting!