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: 216.73.216.119
 Accept: */*
 User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
 Accept-Encoding: gzip, br, zstd, deflate
 X-Zinc-Remote-Address: 127.0.0.1