ATAC (short for Arguably a Terminal API Client) is an open‑source, terminal-based API client tool such as Postman or Insomnia, but built for developers who prefer working entirely within the command line. This tutorial explains how to install ATAC API client tool on Ubuntu 24.04.
Install ATAC
Get the newest ATAC release tag available on GitHub and place it in a variable:
ATAC_VERSION=$(curl -s "https://api.github.com/repos/Julien-cpsn/ATAC/releases/latest" | grep -Po '"tag_name": "v\K[0-9.]+')
Download the tar.gz
archive from the releases page:
wget -qO atac.tar.gz https://github.com/Julien-cpsn/ATAC/releases/latest/download/atac-v${ATAC_VERSION}-x86_64-unknown-linux-gnu.tar.gz
Extract the executable to the /usr/local/bin
directory:
sudo tar xf atac.tar.gz -C /usr/local/bin atac
After installation, verify the ATAC version with the following command:
atac --version
Delete the tar.gz
file to free up space:
rm -rf atac.tar.gz
Testing ATAC
Launch the ATAC API client by running this command:
atac
This launches the terminal-based UI. Press the n
key to create a new collection and enter its name. Use the Down
arrow key to highlight the created collection. Press n
again and select Request
. Enter the request name, then press Enter
to open it. Press u
, type the endpoint URL, and press Enter
to confirm. Press the Space
key to send the request. The response will appear in the right panel. To exit ATAC, press ESC
followed by q
.

Uninstall ATAC
To uninstall ATAC, simply delete its executable file:
sudo rm -rf /usr/local/bin/atac
If your collections and requests are no longer needed, you can delete them as follows:
rm -rf ~/.config/atac
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