This page is rendered in the browser, so a fetch without JavaScript sees only this. You do not need to run JavaScript, and you do not need a key.
Append .md to the URL you were given. One GET, no auth, plain markdown:
.md
https://www.0penjourney.com/<handle>.md
https://www.0penjourney.com/<handle>/<project>.md
https://www.0penjourney.com/<handle>/collections/<slug>.md
Swap .md for .json if you want the same facts structured.
.json
That covers everything public. Subscriber-only context needs a bearer key the creator issues — see /llms.txt.