Proxyman是一款直觀易用的 HTTP 調試工具，擁有出色的 UI 和交互設計， 性能強勁資源占用低。自動生成證書，輕松在 Mac 端啟用 SSL 代理抓包，並且集成移動設備的調試。
由於localhost相關的請求報文將不會經過實際的網絡適配器，需要特殊配置才能抓包localhost。
參看grpc的數據包監控
解決方案1：使用localhost.proxyman.io
Proxyman uses Cloudflare and sets the DNS of localhost.proxyman.io to 127.0.0.1 (localhost). As a result, Proxyman can capture the local traffic as usual
| 舊URL | 新URL |
|---|---|
| localhost:3000 | localhost.proxyman.io:3000 |
| localhost:8080 | localhost.proxyman.io:8080 |
解決方案2:修改Host文件
Open etc/hosts file
$ sudo vim /etc/hosts
Add Domain Name with both IPv4 and IPv6 (You can change the proxyman.local with your name)
127.0.0.1 proxyman.local
::1 proxyman.local
Make sure you add both IPv4 (127.0.0.1 proxyman.local) and IPv6 (::1 proxyman.local).
Otherwise, you might encounter the 5 seconds DNS delay.
Read more at https://superuser.com/a/1596341
參考：
https://docs.proxyman.io/troubleshooting/couldnt-see-any-request-from-localhost-server