Use the hf CLI

The hf CLI that comes with huggingface_hub works against Hangar with HF_ENDPOINT:

export HF_ENDPOINT=https://hangar.example.com
hf auth login --token hgr_...
hf auth whoami
hf download hf-internal-testing/tiny-random-bert --include "*.json"
hf repos create acme/my-model --private
hf upload acme/my-model ./weights

Use hf auth login --token, or the HF_TOKEN variable. The browser sign-in that hf auth login starts without --token also works: it opens Hangar's device page, where you approve the code, and Hangar creates a write Token for the CLI.

hf keeps one active Token in ~/.cache/huggingface/token, whichever endpoint it came from. If you also use huggingface.co, set HF_ENDPOINT and HF_TOKEN in each shell instead of signing in to both.