Insomnia does not automatically detect system-wide proxy settings. A proxy can be set up manually. Set your HTTP or HTTPS proxy server and reroute all future requests through that server by accessing Preferences via the cog icon > General > HTTP Network Proxy.
Note: Proxy server settings apply to all traffic going through the Insomnia application, and cannot be restricted to entities such as Collections and individual requests.
You can also add a comma-separated list of hostnames to the No Proxy box and they will be exempt from going through the proxy server.
Insomnia supports proxy server authentication via Basic Auth, digest, and NTLM.
If your proxy server requires Basic Auth, you can include the credentials in the URL in the following way: