Query Syntax

The syntax is heavily inspired by Scryfall with some changes and a lot fewer features.
You can filter different characteristics of a card and combine multiple filters into one search. See below for examples.

Search fields

Currently supported search fields are:

atk and def.
The level (or l) of a monster. Note that the search does not distinguish between level and rank, so l:4 will return all monsters that are either level 4 or rank 4.
The linkrating (or lr) of a monster.
The class (or c) which you might call card type. Since “type” already means something else, the search uses class for “Spell”, “Trap”, “Effect”, “XYZ”, etc., so c:link will return all link monsters.
The type (or t) of a card (this is “Warrior”, “Pyro”, “Insect”, etc. for monsters, but also “quick-play”, “counter”, or “normal” for Spells/Traps).
The attribute (or attr or a) of a card. This is “Light”, “Dark”, “Earth”, etc.
The text (or effect, eff, e, or o) of a card. This is either the effect or flavor text (for normal monsters). For pendulum cards, this searches in both pendulum and monster effects. The o alias is to help my muscle memory coming from Scryfall.
The set (or s) a card was printed in. This considers all printings, not just the original, and uses the set code (e.g. ioc for Invasion of Chaos or pote for Power of the Elements).
The copies (or legal) you’re allowed to play according to the current banlist.

Anything not associated with a search field is interpreted as a search in the card name, so l:4 utopia will show all level/rank 4 monsters with “Utopia” in their name.
If your search contains spaces (e.g. searching for an effect that says “destroy that target”), the text must be quoted like effect:"destroy that target".

Note that all fields are case-insensitive, so class:NORMAL is the same as class:Normal or class:normal.

Search operators

The following search operators are supported:

Equality (:, =, or ==) checks if the value is equal to your search. For text fields, this checks if your search is contained in the field, so effect:banish will show all cards that have the word “banish” anywhere in their text.
Inequality (!=) checks if the value is not equal to your search. For text fields, this return cards that do not contain the word you searched.
Comparisons (<, >, <=, >=) check if the value is less than, greater than, less than or equal, and greater than or equal to your search. atk>=4000 will show all cards with an ATK of at least 4000. These operators do not work for text fields.

It is possible to filter for multiple values at once, e.g. level:3|6|9 to find all cards that are level 3, 6, or 9.

Searching by regex is supported. Simply put the search string in slashes, i.e. o:/draw \d+ card/. No regex flags can be passed, but i (case-insensitive) is enabled by default.

Examples

All Fire monsters with exactly 200 DEF: a:fire def:200
All “Blue-eyes” fusion monsters except the ones that are level 12: c:fusion l!=12 blue-eyes
All Synchro monsters that are Dark attribute, level 5 or higher, and have exactly 2200 ATK: c:synchro a:dark l>=5 atk:2200
All counter traps that can negate summons: c:trap t:counter e:"negate the summon"
All effect monsters printed in Legend of Blue-Eyes: set:lob c:effect
All Zoodiac cards that are currently banned: legal:0 zoodiac
All chaos-type effect monsters that are level 6 or 8: a:light|dark c:effect l:6|8