This is Zinc HTTP Components echoing your request.
Running a ZnManagingMultiThreadedServer(running 8180)
GET /echo HTTP/1.1
Headers
 Host: zn.stfx.eu
 X-Remote-Address: 18.97.14.81
 User-Agent: CCBot/2.0 (https://commoncrawl.org/faq/)
 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
 Accept-Language: en-US,en;q=0.5
 If-Modified-Since: Fri, 16 Jan 2026 22:18:27 GMT
 Accept-Encoding: zstd, br, gzip
 X-Zinc-Remote-Address: 127.0.0.1