A D&D 5e rules checker that answers mid-game
Can you sneak attack with a thrown dagger? Does a grappled creature still get reactions? Ask in plain words and get a ruling with the reason, without pausing the session to dig through a book.
Included free with every MacerAI account, alongside a compendium.
Questions it is good at
The kind of question that stops a table for five minutes.
Combat
“Does Sneak Attack work with a thrown weapon?” “What happens when I shove a prone creature?” “Can I make an opportunity attack with a ranged weapon?”
Spells
“Does this spell need concentration?” “Can I cast two spells in one turn?” “What counts as a material component?”
Conditions
“What does restrained do to my attacks?” “Can a frightened character move toward the source?”
Checks and saves
“Which skill do I use to climb a cliff?” “Do I add proficiency to this saving throw?”
Why ask an AI instead of searching
Ask like you talk
No need to know which section a rule lives in. Describe the situation and get the answer for that situation.
Rulings with reasons
The answer explains which rule applies and what you still need, so the table can agree and move on.
Stays in the game
The checker sits next to the story in MacerAI, so the answer is one tap away instead of a tab switch.
Which rules it follows
The rule checker answers with D&D 5e-compatible rules based on the System Reference Document 5.1, the open rules released under the Creative Commons Attribution 4.0 license.
Content that is only in newer or paid books may not be covered. For those, or when the table disagrees, the DM still has the final word. Like any AI, it can occasionally get a ruling wrong.
MacerAI is independent and not affiliated with Wizards of the Coast.
Who uses it
Players in an AI DM adventure
Check what your character can do before you commit to an action.
Human DMs
Settle a rules question in seconds during a DM Copilot campaign and keep the scene moving.
New players
Learn 5e by asking about the situation you are actually in, not by reading a rulebook cover to cover.
Rules lawyers
Get a second opinion with the reasoning laid out.
Running the game yourself?
The rule checker is one of the DM Copilot tools, next to narration suggestions, NPCs, battle maps and voice narration.
See all the AI tools for DMsRules checker: questions
Is the D&D rules checker free?
Yes. The rule checker is included on every MacerAI plan, including the free Adventurer plan, and it doesn’t use credits.
Which edition does it cover?
It answers with D&D 5e-compatible rules from the System Reference Document 5.1. Material that is only in newer or paid books may not be covered.
Can it be wrong?
Yes, occasionally, like any AI. It explains the reason for each ruling so you can check it, and at a table the DM always has the final word.
Can I use it outside a game?
You use it inside MacerAI, in an AI DM adventure or a DM Copilot campaign. Creating a free account is enough.
Does it work in Turkish?
Yes. MacerAI works in English and Turkish, and the rule checker answers in the language you play in.
Is this an official D&D tool?
No. MacerAI is independent and not affiliated with Wizards of the Coast. It uses the SRD 5.1 under the Creative Commons Attribution 4.0 license.
Settle the next rules argument in seconds
Create a free account and ask your first question.
Try the rule checker