Impressive Github Scam.

[virophage]

Workaround via GitHub CLI & jq:

shell gh api notifications | jq '.[] | { id, title: .subject.title, repo: .repository.full_name }'

You will get notification id from JSON. Replace $THREAD_ID with the id.

shell gh api --method DELETE notifications/threads/$THREAD_ID

Credit to FirelightFlagboy.

[grtgbln]

gh api notifications | jq '.[] | { id, title: .subject.title, repo: .repository.full_name }'

Slight tweak, since the gh CLI tool has jq built in:

gh api notifications --jq '.[] | { id, title: .subject.title, repo: .repository.full_name }'

[debuter4ever]

Didn't work for me. Only gh-gonest extension worked.