Graph server exposing Blueprints graph via REST Formula was removed
Last version was

Recent formula history

FX Coudert rexster-console: delete (#19083)
Nikolaus Wittenstein Add descriptions to all remaining homebrew packages
Alex Dunn rexster-console 2.6.0
Adam Vandenberg rexster-console: note that patch is upstream in next version
Brennon York Rexster Console 2.5.0

Formula code at GitHub