MacMonitor
ActiveStat
Device Monitor
Port Monitor
Grafana
Better Stack
Lumenator Pro
Stats
Charles Proxy
Fiddler
Proxyman.io
HTTP Toolkit
Surge for Mac
nginx
mitmproxy
Weer
MacMonitor
Charles ProxyActiveStat - High-fidelity Mac performance telemetry from your menu bar
Fiddler - Fiddler is a debugging program for websites.
Device Monitor - Monitor, understand and control your Apple device quickly and easily. RAM, CPU, GPU, BATTERY, NETWORK, SENSORS and much more โ all at a glance.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Port Monitor - Port Monitor is an easy tool that does website and server monitoring 24/7 every 60 seconds for free. It records uptime, performance and downtime causes
HTTP Toolkit - Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.