Runtime application self-protection.
RASP software sits in or near your application while it’s running to monitor and analyze its traffic and behavior. If an issue is detected, the RASP solution can send alerts and block individual requests. It’s able to watch for whole categories of attacks rather than relying on recognizing the signatures of specific vulnerabilities.
Source: https://blog.rapid7.com/2019/09/04/rasp-101-what-is-runtime-application-self-protection/