We recommend TCGGraph for a collection tracker spanning multiple games. For a focused single-game product, compare TCGdex for Pokémon, Scryfall for Magic and YGOPRODeck for Yu-Gi-Oh! before choosing a paid service.
Which options should you evaluate?
| Option | What to evaluate | Decision detail |
|---|---|---|
| Shared multi-game app | TCGGraph | One catalog integration can reduce mapping work. |
| Single-game collection | TCGdex / Scryfall / YGOPRODeck | Check game-specific fields and provider operating rules. |
| Inventory repricing | JustTCG | Evaluate batching and condition-specific price data. |
Provider facts come from the linked documentation. Examples and workflow recommendations are this guide’s analysis.
Own your collection records
Your user’s collection should belong to your application’s data model. Keep an internal holding ID, quantity, acquisition details and a reference to the provider’s printing ID. That makes an API migration a mapping task instead of a rewrite of ownership records.
A useful holding record separates what the user owns from what the market currently says it is worth. Price updates should not overwrite purchase history or the user’s selected condition.
Cache metadata and prices separately
Card names and descriptive fields usually have a different refresh requirement from prices. Separate those caches and preserve source timestamps. Your interface can remain usable if a price refresh is delayed.
Deduplicate valuation requests by printing before calling the API. If 100 users own the same printing, you may not need 100 identical refreshes. Review the provider’s storage and reuse terms before designing shared caches.
Make portfolio totals explainable
Show the market and currency used, the age of the prices and the number of unpriced holdings. Do not mix several valuation metrics without labeling the result. Let the user inspect the card-level values behind the total.
Then connect discovery to action: search for a printing, inspect it, add it to the collection and refresh its value. Evaluate the API against that complete workflow rather than an isolated sample response.
Design the holding record for future corrections
Store your own holding ID, user ID, quantity and acquisition details alongside the external printing reference. Keep the user’s chosen finish and condition explicit. If the wrong printing was accepted, correct the mapping through a visible workflow while retaining an audit of the original ownership record.
For imports, track which rows were matched, ambiguous or rejected. A name-only CSV can be useful input, but it should not silently become an exact printing match. The integration guide explains how to build the search-confirm-save loop.
Explain portfolio changes across time
A larger portfolio total can reflect price movement, new purchases or changes in quantity. Separate those causes when showing performance. Keep the start and end observations comparable by printing, source, currency and metric. Missing historical points should make the calculation incomplete rather than inventing a zero-value starting point.
For graded holdings, include grading company and grade in the value identity. For multiple games, keep a consistent collection interface while retaining the individual game’s printing fields. See the price-history guide and graded pricing guide before adding a performance chart.
Frequently asked questions
Should the API provider store my users’ collections?
A catalog provider and your user database serve different purposes. Unless the provider explicitly offers the storage capability you need, keep ownership records in your application and link them to external catalog IDs.
How do I value duplicate cards?
Use a matching price observation for the printing and variant, then apply the holding quantity. Keep acquisition records separate if individual copies were bought at different times or prices.
What is the best API for a multi-game collection tracker?
We recommend evaluating TCGGraph for its shared catalog and related pricing and recognition workflows. Test the games and printings your collectors actually use before choosing a plan.
Sources and further reading
Your next step with TCGGraph
Inspect the documented fields, then test the cards and workload your application needs.