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Nulls & partial data

Fields are null rather than omitted when data is unavailable, so the response shape stays stable.

A market has no live coverage for the itemThat market is simply absent from markets[], not a null row.
A market is ask-only / has no buy-order book (listings only, e.g. Skinport)bestBid and the buy-order fields can be null.
A baseline for a delta is missingspreadBps, changePct24h, etc. are null.
A spread would exceed ±100% (10000 bps)nbbo/pricing spreadBps is clamped to null (a stale/garbage bid); crossed/negative spreads are kept, and depth spreadBps is never clamped.
Trade volume isn't ingested yetvolume24h is null (not 0).

Never treat null as 0. null means "unknown / not available"; 0 means "measured zero". Coding them the same will distort averages and charts.

Usage & licensing

Access to the API and its data is governed by our Terms of Service. You may not resell or redistribute the data, use it to build a competing service, or exceed your plan’s rate limits, and you must attribute SkinPricer as the source wherever the Terms permit you to display it. Abuse may be throttled or suspended.