Incorporate the d&d compendium's API.

Incorporate the d&d compendium's API into your product so that you can pull monsters, traps, magic items, etc. from that. If they don't have an account it will still show them the location of the source material to look it up and give them base info (level, name, type, etc). If they do allow them to log in and pull all the stat block of all the monsters on their screen at once.