I could not see any requests from my localhost server

Fix why localhost request/response doesn't appear on Proxyman

1. Problem

I develop a local NodeJS, Ruby, or Python Backend at http://localhost:3000, but when I visit http://localhost:3000 from Google Chrome or Safari, there is no traffic on the Proxyman app.

Why does this happen? By default, on macOS, all localhost requests don't go through the System HTTP Proxy. Therefore, there is no traffic recorded by the Proxyman app.

2. Solution

2.1 ✅ New Solution for v6.3.0

From Proxyman macOS v6.3.0, Proxyman can:

• Capture http://locahost:3000 or any localhost traffic in Google Chrome / Firefox without modifying the /etc/host file

• Works with a single click

• Tutorial: https://proxyman.com/posts/how-to-capture-http-localhost-traffic-from-google-chrome

How to do it

1. In Proxyman app -> Go to the Setup Menu -> Automatic Setup -> Click on the "Google Chrome" button

2. New Google Chrome will appear

3. Done. Visit http://localhost:3000 and Proxyman can capture it

2.2 Old solution

There are two solutions to fix it: You should follow either one of the following solutions.

Solution 1: Map localhost to the domain name in /etc/hosts

1. Open etc/hosts file with Vim or VS Code.

$ sudo vim /etc/hosts

2. Add Domain Name with both IPv4 and IPv6 (You can change the proxyman.debug with your name)

127.0.0.1 proxyman.debug
::1 proxyman.debug

Add proxyman.debug in /etc/host

3. Save the file with sudo permission

4. Access your localhost server by http://proxyman.debug:3000 (replace 3000 with your localhost ports)

6. Enjoy debugging!

If you use a local as a suffix, e.g. proxyman.local, make sure to remove the `*.local` from the Bypass Proxy List (Instruction).

Solution 2: Use localhost.proxyman.io instead of localhost

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 ✅

For example:

Old URL	New URL
localhost:3000	localhost.proxyman.io:3000
localhost:8080	localhost.proxyman.io:8080
...	...