config.toml file.
Prerequisites
Setup
Get your CometAPI API key
Log in to the CometAPI dashboard. Click Add API Key and copy your key and base URL (

https://api.cometapi.com).

Edit config.toml
Open 
~/.config/gptme/config.toml (create it if it doesn’t exist). Set url to https://api.cometapi.com/v1 and paste your CometAPI key as the API key.