When running target scans, you can use the information in the user-agent header to identify HTTP requests from Snyk API & Web.
Here is an example of a user-agent header:
Mozilla/5.0 (compatible; +https://probely.com/sos) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36 ProbelySPDR/0.2.0
If you notice, there is a specific string in the header: https://probely.com/sos.
Use it to identify Snyk API & Web requests and do not rely on any other information you find in the header for that effect.
Another alternative to identify Snyk API & Web requests is through their IP address.