Add custom headers to each request that is intercepted by Burp Suite. For example if an API demands a random value for each request or a timestamp in a specific time range.
Download the .jar from the releases page and add it under your extensions.
Template taken from https://github.com/PortSwigger/burp-extensions-montoya-api-examples/tree/main/proxyhandler/src/main/java/example/proxyhandler