20 queued requests per user (see also Troubleshooting#user_queued_limit_exceeded)3 active requests per user You may also wish to check how to trace back an old requestRelated articles Page: Total number of requests a user can submit - Web API FAQ Page: Limitations in the Public Datasets web interface - Web API FAQ Page: How to use the MARS Activity web page - Web API FAQ Page: How to improve the efficiency of my requests - Web API FAQ Page: How to write more complex scripts for large sets of data - Web API FAQ
You may also wish to check how to trace back an old request You may also wish to check how to trace back an old request