Methodology & standards

How our numbers are made

Anyone can claim their crypto data is honest. This page is how you check ours — including the parts we get wrong, the things we cannot measure, and what we would have to tell you if money ever changed hands.

Market data

Prices, market caps, volumes, supply and all-time highs for 516 assets come from CoinGecko and are written into our own database by a job that runs every five minutes — last completed 21s ago. Pages are rendered from that copy, not from a live call, which is why they load instantly and stay up when an upstream API does not.

Every figure on the site is therefore as of the last sync, never a real-time tick. Where a page can show you that timestamp, it does.

Our own price history

From 2026-08-09 we record one row per asset per UTC day — open, high, low, close, market cap, volume — built from our own repeated observations rather than a vendor's daily bar. 1,015 rows so far. A day we fail to record is a gap we cannot fill later, so the job that writes it is deliberately conservative: if the market data is more than thirty minutes stale, we record nothing for that interval rather than stamping an old price with a new timestamp.

Sellability

Sellability estimates what a position could realistically be sold for, as opposed to what it is quoted at. For a token and a holding size we request live routed sell quotes at 10%, 25%, 50% and 100% of the position and compare each against the reference price.

• Reference price — from GeckoTerminal. Never from a small quote: at dust sizes a quote is rounding noise, and during development that produced an exit apparently worth more than paper value.
• Quotes — the OpenOcean aggregator, which routes across Uniswap v2/v3/v4, Aerodrome and others.
• Contract checks — GoPlus, for honeypot behaviour, sell taxes and transfer restrictions. A missing flag is treated as unknown, never as safe.
• Liquidity and pools — GeckoTerminal.

If a contract is flagged unsellable we withhold the exit figure entirely rather than print a number beside a warning, because a number beside a warning invites you to believe the number.

What Sellability cannot tell you

This is the important section.

• Quotes are estimates, not fills. The price moves while you execute, and gas is not included.
• We cover on-chain routes only. For a token that also trades on centralised exchanges, our figure is a floor — you would likely do better on an exchange. Where we can detect this, we say so above the numbers.
• We verify our own arithmetic against on-chain reserves only for constant-product pools. Concentrated-liquidity pools (Uniswap v3) and Uniswap v4 — which keeps every pool's tokens in one shared contract — cannot be independently checked this way, and we report that rather than counting them as verified.
• We do not publish a letter grade. Grades are easy and we have not yet earned one: the back-test that would justify it covers too few pool types. Until then you get a confidence level instead, and "low" is a real answer.
• A quote we can prove is wrong is discarded, not shown. If a smaller slice reports worse friction than a larger one — impossible in a real market — that rung is marked unquotable.

Money, and what it cannot buy

Cryptominium will carry sponsored placement and affiliate links, and every commercial link will be marked. Two rules do not bend:

• Sponsorship buys position, never a rating. No payment changes a score, a review or a Sellability result.
• Commercial relationships are disclosed on the page where they apply, not buried here.

What we will never ask for

We will never ask for your seed phrase, private key, or exchange password. No page on this site will ever be a box you type them into. Our recovery tooling runs offline on your own machine for exactly this reason. Any site — including one claiming to be us — that asks for a seed phrase is stealing from you.

Sellability needs no wallet connection. You paste a public contract address and a number.

Privacy in one paragraph

We set no cookies and run no analytics or third-party trackers. Your theme and currency choices are stored in your own browser. Tool checks are logged with a salted hash of your IP address — enough to stop one visitor exhausting the free services we depend on, not enough to identify you. Full detail on the privacy page.

Corrections

If a number here is wrong we want to know, and we would rather fix it than defend it. Email hello@cryptominium.com.

Cryptominium provides market information and educational tools. We are not a broker, exchange, custodian or financial adviser, we never take custody of your assets, and nothing on this site is financial advice or a recommendation to buy or sell. See the full disclaimer.