Need a hand?

Yes. Every account gets 5 free credits each day. The deck builder, collection, card search, and playtest are free to use. The AI tools use credits:

• Threat Index scan (Commander): 5 credits.
• PowerTune, ManaTune, DeckTrim, and deck scans for other formats: 5 credits on Best, or 1 credit on Eco.
• RuleCheck: 1 credit.
• Deckhand Chat: 1 credit for your first message. One credit covers a few messages.
• The Roaster and Commander Quest: Free.

With the daily credits, a free account can run one Threat Index scan each day. You can buy credits or subscribe if you need more.

A subscription adds monthly credits, a higher card-scan limit, Smart Binders, and Deckhand reports. Subscribers keep their 5 daily credits, and DeckCheck spends daily credits first.

DeckCheck tells you how your specific deck performs instead of only showing what is popular. Its DeckCheck Threat Index gives playgroups a consistent starting point for power-level and Rule 0 conversations.

It also brings several tools into one place:

• AI deck analysis and tuning: Threat Index rating plus DeckTrim, PowerTune, ManaTune, and the Roaster.
• Collection management: Track cards across binders and decks.
• Card scanning: Add physical cards to your collection with your camera.
• Card and deck discovery: Find decks by format, bracket, and Threat Index. In the builder, find cards with Smart Search by describing them in plain language.
• Combos: Find the combos in your deck with data from Commander Spellbook.
• Commander Precons: Browse the preconstructed Commander decks and their Threat Index scores.
• Store events: Local game stores run events on DeckCheck and check the decks that players register.
• RuleCheck: Ask a rules question about your game situation and get a clear answer.
• Playtest: Draw starting hands and goldfish your deck in the playtest sandbox.
• The Deckhand: Your personal assistant for Magic. In the builder, it helps you build and tune a deck and answers your questions. Every account can use Deckhand Chat. For subscribers, it also watches your decks and sends you reports, for example the possible upgrades in each new set.

The Deckhand is your personal assistant for Magic. It helps you build and tune your decks, answers your questions, and watches for the things that matter to your decks. Today, it has two parts:

• Deckhand Chat (every account, uses credits): Open a deck in the builder and click Deckhand. Ask for a build plan, a better swap, an answer to a question, or anything else about the deck. The Deckhand offers changes, and your deck changes only when you click Yes. Your account must have a verified email.
• Deckhand reports (subscribers only, no credits): The Deckhand watches the decks that you choose. When something matters to those decks, it sends you a report. For example, at every set release it tells you which new cards can make a deck better.

DeckCheck will add more to the Deckhand over time. DeckCheck Stasis does not include Deckhand reports.

Your first message in a chat uses 1 credit. One credit covers a few messages. The ring beside the message box shows how much of the credit is used. When the ring is full, your next message uses 1 more credit. A reply does not stop when a credit is used up.

Replies that do more work use a credit faster. For example, a build plan uses more of a credit than a short question.

If the Deckhand offers to open a tool, such as PowerTune, that tool uses its own credits. The tool asks you to confirm before it runs.

You can pick Best or Eco beside the ring. The credit rules are the same, but a credit covers more messages on Eco. On Eco, response quality and accuracy can drop.

The DeckCheck Threat Index (DTI) runs from 0 to 96. It scores 12 benchmarks in five groups: resources, access, pressure, interaction, and resilience. Each benchmark gets a tier from S (decisive) to F (deficit). A higher score means the deck threatens the table earlier, more reliably, and with more resilience. A lower score means it is slower or more casual.

The score maps to the Commander Brackets. 16 to 31 is Bracket 2, 32 to 51 is Bracket 3, and 52 to 67 is Bracket 4. Bracket 5 needs cEDH construction, usually with a score of 68 or higher. Below 16, a deck built for exhibition play is Bracket 1. Other decks below 16 are Bracket 2.

Some very fast decks are Bracket 4 at any score: for example, a deck that can win by turn 4, or a deck that has a must-answer threat by turn 3 with fast mana or setup. Some cards and combos set a minimum bracket, such as Game Changers, extra-turn cards, mass land denial, two-card infinite combos, and early or extra-turn combos that Commander Spellbook rates Ruthless and that can beat the whole table. The Threat Index can move a deck up from that minimum, but never down.

Open the Threat Index breakdown on a deck page, then select a benchmark to see why it got its tier and which cards support it. The score gives every deck a shared yardstick, so bracket and Rule 0 conversations can be faster and clearer.

The Threat Index is for Commander decks. Decks in other formats get a deck scan with a primer, but no score or bracket.

To learn how the Threat Index started, read why DeckCheck replaced CRISPI. Some rules in that post changed after we wrote it. This page has the current rules.

An AI model reads your deck and gives each benchmark a tier. DeckCheck then calculates the score and the bracket from those tiers with fixed rules.

The AI can read the same deck differently each time. A rescan can move one or more tiers, and this changes the score. Each Rescan is a new scan and uses 5 credits.

When the same list has two or more scans, its Threat Index is the Omni-Score: the middle tier of each benchmark across every scan of that list, scored like one scan. With an even number of scans, a tie between two tiers goes to the higher tier, and a tie between two turn estimates goes to the faster turn. Each new scan of the same list joins the Omni-Score, so your earlier scans still count. From three scans, the median can outvote one unusual scan. The deck timeline in the Threat Index window shows every version of your list, each scan, and the Omni-Score.

When we update the Threat Index or the AI model that reads your deck, a rescan can change the score and the bracket, even if your deck did not change.

Scores are never adjusted to use more credits. If a tier looks wrong, tell us with the feedback form in the Threat Index breakdown.

PowerTune, ManaTune, DeckTrim, and deck scans for non-Commander formats have two quality modes. You choose one when you run the tool:

• Best (5 credits): The default. Our smartest AI, for the best quality and accuracy.
• Eco (1 credit): A lighter AI for fewer credits. Quality and accuracy drop. Use it when good enough will do.

You can pick Eco for a single run, or set Eco as your default in your profile preferences.

The Threat Index scan always runs on Best and costs 5 credits, so every Commander deck gets its score from the same engine. RuleCheck always costs 1 credit. The Roaster is free but rate-limited. On the free tier, a Best run uses all 5 daily credits.

Open your deck in the builder, then open the Threat Index breakdown. In Rate this result, give the result 1 to 5 stars. You can also pick the bracket that you think fits the deck and add a comment.

To dispute one tier, select that benchmark and use Disagree with the tier? DeckCheck sends your choice with your rating. You can edit your feedback later. Only the deck owner can send feedback on a result.

Feedback goes into a review queue. DeckCheck does not change scores automatically. You can also email support@deckcheck.co with the deck URL and a short explanation.

DeckCheck reserves the credits when you start a tool and charges them only when the result comes back. If the run fails, times out, or never returns a result, the reservation is released and nothing is charged. If you close the page before the result comes back, the run continues and uses the credits. Email support@deckcheck.co if you think you were charged in error.

Unused subscription credits roll over to the next month, up to your plan's limit:

• Spellslinger: Up to 450 credits.
• Sage: Up to 900 credits.
• Archmage: Up to 1,800 credits.

The limit stops new credits from going above it. DeckCheck never removes credits that you already have. On a monthly plan, new credits arrive after each renewal payment. On a yearly plan, credits also arrive each month, not all at once.

Subscribers also keep their 5 free daily credits. DeckCheck uses daily credits first, then subscription credits, then DeckCheck Mana.

DeckCheck Mana does not expire. These one-time purchase credits are separate from subscription credits.

You keep your current plan benefits and credits until the billing period ends. After that, your rolled-over subscription credits expire and your account returns to the free tier.

DeckCheck Mana remains on your account and does not expire.

If you want to preserve rolled-over credits, you can switch to DeckCheck Stasis for $1 a month. Stasis keeps those credits frozen until you return to an active subscription.

If you upgrade: You keep your current credits and immediately receive the new plan's full monthly allocation. Paddle charges the full price of the new plan on the day that you upgrade.

If you downgrade: You keep your current credits and plan benefits until the next billing date. The lower plan starts on that date, with its lower rollover limit. There is no refund for the current billing period.

If you switch to Stasis: Your current benefits remain until the next billing date. Your rolled-over credits are then preserved but cannot be used until you return to an active subscription.

Purchases appear on your account after checkout. Start checkout from the Get more page while you are signed in, so DeckCheck can link the purchase to your account. If the credits do not appear after a few minutes, email support@deckcheck.co with the email address from your receipt.

The free tier includes the deck builder, the collection, and 5 credits each day for deck scans and other AI tools. Paid plans and one-time credit purchases help cover AI computing, hosting, and continued development.

One-time purchases are available for people who do not want a subscription.

DeckCheck Stasis is a $1 monthly plan that preserves rolled-over subscription credits without allowing you to spend them.

• Your rolled-over credits remain frozen and do not expire.
• You do not receive new monthly credits.
• You keep the 5 free daily credits.
• You must return to an active subscription to use your frozen credits.
• If you cancel Stasis, your frozen credits expire.

Stasis is available only to subscribers. To switch, use the cancel option in your profile settings.

Yes. Every deck has a visibility setting that you can change from the builder menu or from My Decks:

• Public: Anyone can view it, and it is eligible for deck search.
• Unlisted: Only people with the direct link can view it.
• Private: Only you can view it.

A deck leaves deck search as soon as it stops being public. You can delete a deck at any time from My Decks, and the deletion removes it from search.

In your profile settings, turn on Hide profile to stay out of leaderboards, search, and community pages. You can also delete your account, decks, and credits from your profile settings.