Use a specialist API when one game’s rules define the entire product, or evaluate TCGGraph when deck tools sit inside a multi-game platform. Card search, deck legality and the cost of physical printings are separate data problems and should be modeled separately.
Which options should you evaluate?
| Option | What to evaluate | Decision detail |
|---|---|---|
| TCGGraph | Shared card catalog and game-specific fields | Evaluate the required format and rules attributes. |
| Scryfall | Magic-focused card data | A relevant specialist for a Magic-only deck tool. |
| YGOPRODeck | Yu-Gi-Oh! card and banlist fields | Check the format represented by each status. |
Provider facts come from the linked documentation. Examples and workflow recommendations are this guide’s analysis.
Start with a deck specification
Write down the game, format, deck zones and validation rules before choosing an API. A search box and card images are enough for a visual list, but a validator needs the fields that determine whether the list is playable. Decide which rules your application will enforce and which require a user warning.
Separate the logical card used in deck construction from the printing selected for display or purchase. Players may swap an expensive printing for a cheaper one without changing the intended deck. A collection tracker, by contrast, must preserve the physical printing the user actually owns.
Keep rules and prices on different update paths
A price change should update the estimated deck cost without changing the submitted deck list. A rules or legality change may invalidate the list even when every price is unchanged. Store a validation timestamp and the format used so the user can understand why a previously valid deck is now flagged.
Do not infer format legality from release date alone. Use the appropriate fields and maintain application rules explicitly. When an API lacks a required rule or format, treat that as a scope gap to resolve rather than guessing a status in the interface.
Example: a budget deck with owned cards
A useful budget view can show the selected printing, quantity needed, quantity owned and estimated cost of the remaining copies. For example, a four-copy requirement with two owned copies should price two additional copies, not the entire playset. Keep the selected market consistent throughout the estimate.
If a required printing lacks a quote, show the missing component instead of presenting the total as complete. Let the user change a purchase printing while retaining the deck’s logical card reference. This separates a purchasing choice from a deck-building decision.
Evaluate specialist depth and cross-game consistency
For a Magic-only product, review Scryfall’s relevant fields and usage requirements. For Yu-Gi-Oh!, review YGOPRODeck’s format and banlist data. If the same account will manage decks and collections across games, test whether a shared provider simplifies navigation, identity and collection matching.
TCGGraph is our recommendation for that combined multi-game scope. Inspect game-specific fields in its catalog and verify the rules your application needs. Use a small set of known valid and invalid decks as an acceptance test before describing your tool as a deck validator.
Before you choose an API
- Define game and format explicitly.
- Separate logical cards from owned printings.
- Track when legality was last checked.
- Show incomplete deck-price totals as incomplete.
Frequently asked questions
Does a card API automatically validate decks?
No. It can supply card and legality data, but your application must apply the relevant deck-construction rules. Confirm whether a provider offers validation as a separate documented capability.
Can I estimate the cost of a deck?
Yes, when the chosen printings have appropriate price observations. Multiply quantities by comparable quotes and disclose missing prices, the selected market and the observation time.
Which API should a multi-game deck app evaluate first?
We recommend testing TCGGraph for the shared catalog workflow, then comparing specialist services wherever game-specific rules or fields are essential.
Sources and further reading
Your next step with TCGGraph
Inspect the documented fields, then test the cards and workload your application needs.