USD valuation

Every transfer row has a usd value. It equals amount times the price the service held at the moment it indexed the row. It is computed once and never updated.

#Price source

Prices come from the CoinGecko simple/price endpoint, in USD, for one list of ids. The poller refreshes them every 60 seconds. Read the same values with Asset prices.

This sample of GET /prices was captured on 2026-11-04 UTC. It is an example, and values change every minute.

{
  "ethereum": { "usd": 2423.51, "change_24h_pct": 5.86 },
  "binancecoin": { "usd": 716.72, "change_24h_pct": 2.86 },
  "polygon-ecosystem-token": { "usd": 0.096378, "change_24h_pct": 4.66 },
  "solana": { "usd": 95.35, "change_24h_pct": 2.23 },
  "usd-coin": { "usd": 0.999692, "change_24h_pct": 0.01 },
  "tether": { "usd": 0.999402, "change_24h_pct": 0.03 },
  "wrapped-bitcoin": { "usd": 80237, "change_24h_pct": 3.67 },
  "dai": { "usd": 1, "change_24h_pct": 0.01 }
}

#Stablecoins are not fixed at $1

Stablecoins use their market price from the same source. There is no hard-coded peg. This has one visible effect at the $100,000 threshold.

The threshold test is usd >= 100000. Rows at round numbers can fall on either side, depending on the price that minute. The figures above are worked examples using the sample prices.

#Mapped assets

A wrapped or bridged token uses the price of its reference asset. The service does not read a separate market for each one.

#Price at index time

The usd value is a record of one moment, and it does not follow the market after that.

• The price can be up to about a minute old when the row is stored.
• A row from yesterday keeps yesterday's price.
• Summing usd over time gives a sum of values at different prices, which is not a current value.

For a current value, multiply amount by a current price from /prices.

#Where other USD values come from

Not every USD figure in the API has the same origin. Compare them with care.

A token report's price_usd and a /prices value for the same asset will usually differ by a small amount. The first comes from DEX pools, and the second from an aggregator.

#Limits

• Price failures. If a refresh fails, the service keeps the last good prices and goes on valuing rows with them. There is no marker on the row. coingecko on Status shows the failure.
• No price at start. Until the first refresh succeeds after a restart, rows are skipped, because a row needs a price. This window is normally seconds.
• No fee or slippage logic. usd values the transferred amount only.
• Precision. amount and usd are doubles. The raw integer value from the chain is not stored. For exact amounts, read the transaction from the chain.
• Not a trade price. usd values a transfer at a reference price. It is not what any party paid or received. See transfers vs trades.

Market prices are for information only and are not financial advice.