You can get Oracle in JSON format from mtgjson.com - expected to be in AllSets-X.json

Holiday cube can be in a file named "holidaycube.txt" with one card per line

Comprehensive rules can be in a file named "CR.txt" with one rule per line, in the format: rulenumber. rule.

e.g: 100.1. These Magic rules apply to any Magic game with two or more players, including two-player games and multiplayer games.