Loot Seller

About & Methodology

Loot Seller measures prices on the DonutSMP auction house and publishes them as charts, history, and a JSON API. This page states exactly what is measured, how, how often, and what the numbers do and do not mean.

Price methodology v1.0 · USD reference rate methodology v1.0 · effective August 2026

What Loot Seller is

An independent, automated price index for a public in-game market. Loot Seller observes the DonutSMP auction house continuously and records what is listed there. Nothing is estimated, modelled, or crowd-sourced, and no figure is ever edited by hand — every number began as a real listing that was publicly visible.

The project began in July 2026. It is not affiliated with DonutSMP, Mojang, or Microsoft, and has no commercial relationship with the server.

What is collected, and how often

Property	Value
Source	The public DonutSMP auction house
Method	Automated and continuous — no manual entry, no user submissions
Coverage	A curated list of frequently traded items, currently 67
Frequency	Continuous; each item is re-observed roughly every 10 minutes
Chart aggregation	Hourly OHLC buckets, rolled up to daily for longer views
Currency	DonutSMP in-game coins, unless a figure is explicitly marked USD

Every observation carries its own timestamp, so freshness is reported per item rather than as a single site-wide figure. If an item has not been seen recently, its page says so.

What the terms mean

Cheapest single (floor): The lowest total price on any current listing of that item, regardless of how many are in the listing.
Full stack: The lowest total price on a listing containing a complete stack. Only shown for items that stack.
Top buy order: The highest standing per-unit bid anyone has placed for that item.
Flip margin: The gap between the top buy order and the cheapest listing — what you would make buying at one and selling at the other, before any fees.
USD reference value: An in-game price converted at the USD reference rate below. An analytical estimate of real-world worth, not a price at which anything is sold.

The USD reference rate

Every price on this site is denominated in a currency that inflates. A chart going up can mean the item became more valuable, or that the currency became less valuable — and from inside the game those are indistinguishable. The reference rate is an outside yardstick that separates them.

It is measured from public listings on third-party marketplaces where DonutSMP currency is traded, polled every 15 minutes, and filtered to offers a normal buyer could realistically transact against:

One delivery method only, so the series compares like with like.
Offers with a minimum purchase above 1B coins are thrown out. The cheapest sticker price on any given day almost always has a 3.5B–100B minimum attached — you cannot buy at that price at all without handing over a large sum up front, usually to an account with almost no feedback. Requiring a big payment before the buyer has anything to go on is a well-worn set-up for a scam, so those listings are excluded outright rather than treated as the going rate.
Sellers with at least 50 ratings and a 98% score.
Priced as the blended cost of acquiring 10B coins walking the book upward, not the cheapest sticker — the cheapest qualifying seller often holds under 0.5B, so their price is real but untradeable at any size.
If the filtered book cannot fill 10B, nothing is recorded for that poll. A gap is honest; a point derived from scraps would be indistinguishable from a real move later.

Every raw poll is archived before the index is computed, so a future methodology can be recalculated over real history rather than starting from zero. See the live rate and its current spread →

Methodology versioning

The calculation is fixed at v1.0. Changing a filter or the depth target would make points before and after the change incomparable — a silent break that looks exactly like a real market move. If the methodology ever changes, it will be published as a new version under a new series name, and the existing series will be left intact rather than retroactively altered.

What Loot Seller does not do

Loot Seller does not sell DonutSMP items, currency, or accounts. It does not facilitate real-money trading, does not broker or escrow trades, and does not link to anyone who does.

USD figures anywhere on this site are analytical reference values derived from observing public third-party listings. They describe what a currency appears to be worth. They are not offers, quotes, or invitations to trade.

Limitations

Coverage is a curated list, not the whole auction house. An item absent from the list simply is not tracked.
Prices are the cheapest listing, which is an asking price — not a record of a completed sale. The auction house does not publish sale records.
A thinly traded item can move sharply on a single listing. The buy-order side is often thinner still.
The USD reference rate reflects a market that is itself influenced by player population and demand, so it is a good proxy for currency strength rather than a pure measure of it.
History begins when tracking of that series began. Charts do not extend backwards before the first observation.

Using the data

All of it is available as JSON, free and without authentication for the public endpoints — including current prices, hourly and daily history, buy orders, the tracked-item list, and the current USD reference rate. See the API documentation.

If you publish anything derived from it, a link back to lootseller.io is appreciated but not required.