TCGGraph is our preferred starting point for a store that needs multi-game catalog data and regional price references. Compare JustTCG for a pricing-focused batch workload. A card-data API supplies reference information; your commerce system still owns stock, orders and the price you choose to charge.
Which options should you evaluate?
| Option | What to evaluate | Decision detail |
|---|---|---|
| TCGGraph | Catalog, regional price data and optional scanning | Useful for consistent records across games. |
| JustTCG | Inventory pricing and batch queries | Evaluate batch size against your unique variants. |
| Commerce integration | Stock and order operations | A separate system from the reference price feed. |
Provider facts come from the linked documentation. Examples and workflow recommendations are this guide’s analysis.
Map physical stock before automating prices
A store SKU should identify the actual item for sale: printing, finish, language, condition and quantity. Link that SKU to the provider’s record after review. Store your purchase cost and selling price independently from the reference quote so a data refresh cannot overwrite commercial decisions.
Treat bundles, sealed products and graded slabs as distinct product categories. Do not assume a service that covers singles also covers every sealed product or certification record. Define the data required by each category before selecting a provider.
Build a repricing proposal before a stock mutation
Run reference-price updates into a staging table. Apply your own rules for margins, floors and unusual changes, then produce a reviewable proposed price. Record the old quote, new quote, source time and rule that produced the suggestion. That history makes corrections much easier when a listing looks wrong.
An unavailable price should leave the last approved selling price intact and create a review item. A failed reference request should never delete stock or set a valuable card’s price to zero. The connection that writes to your store should have its own authorization and error handling.
Example: a nightly inventory job
Imagine 8,000 stock rows that resolve to 3,200 unique provider variants. If the chosen endpoint accepts batches of 100, the ideal refresh is 32 requests before retries and pagination. That is an illustrative batch calculation; confirm whether your selected provider supports that exact operation.
Schedule those requests within the per-minute and daily limits. Save progress as each chunk finishes so an interrupted job can resume. Publish proposed changes only after verifying that the response belongs to the requested market and product variant.
Connect catalog research to an integration trial
Use the same inventory sample for every provider: ordinary singles, difficult finishes, missing mappings and high-value cards requiring manual review. Measure successful SKU matches, unpriced stock and the time needed to review proposed changes. Those outcomes are more useful than a plan’s headline allowance.
Start with the TCGGraph explorer to inspect representative records, then use the direct comparison to price the actual request mix. If you need Cardmarket account operations, review the marketplace’s own capabilities separately from third-party price access.
Before you choose an API
- Own SKU, stock and order data in your commerce system.
- Review identifier mappings before enabling repricing.
- Stage changes and retain a price floor.
- Resume interrupted batches without duplicating store updates.
Frequently asked questions
Can a TCG pricing API update my store inventory?
A reference-data feed and a store-management integration are different capabilities. Your application needs a separate authorized path for changing listings, prices or quantities in its commerce platform.
Should every stock item trigger its own price lookup?
Deduplicate by the provider’s price identity and use supported batching where available. Keep condition and finish distinctions; merging unlike variants can assign the wrong reference value.
What should happen when a card has no market price?
Keep its current approved selling price, mark the reference as unavailable and route it for review. Missing market data is not evidence that the stock has no value.
Sources and further reading
Your next step with TCGGraph
Inspect the documented fields, then test the cards and workload your application needs.