Python App in macOS LaunchAgent Can't Reach the Internet? Here's the httpx Proxy Trap You Need to Know

Sat, 30 May 2026 09:00:00 +0800

TL;DR:

When a Python application using httpx with trust_env=True runs inside a macOS LaunchAgent, it silently picks up the system proxy settings from scutil --proxy. But the LaunchAgent process may not be able to reach that proxy server at all — resulting in All connection attempts failed or No route to host errors.

The fix is one line: add NO_PROXY=* to the LaunchAgent’s plist EnvironmentVariables.

This article documents the full debugging journey: from discovering that my AI Agent’s WeChat Enterprise (WeCom) messages weren’t being replied to, through methodical proxy troubleshooting, to finally pinning down the root cause — macOS system proxy + LaunchAgent network isolation. We’ll dive deep into Python httpx source code, macOS proxy architecture, and the many gotchas of LaunchAgent runtime environments.

Install Frp client on Mac and use remote desktop

Mon, 18 Jan 2021 13:28:26 +0800

You can install it with Homebrew. The following section shows the old manual extraction method. Keep reading if you want that approach. brew install frpc vi /usr/local/etc/frp/frpc.ini brew services start frpc Download the Darwin package from FRP releases and unzip it omitted Copy the executable sudo mv ~/Downloads/frp_0.34.3_darwin_amd64/frpc /usr/local/bin/ Add the frpc configuration file Adjust server_addr, server_port, and remote_port as needed. Edit the auto-start configuration Commands related to auto-start sudo su cat>/etc/frpc.

Launchctl on Margrop Blog

Python App in macOS LaunchAgent Can't Reach the Internet? Here's the httpx Proxy Trap You Need to Know

Install Frp client on Mac and use remote desktop