Price methodology

ETH/USD, and the two independent sources we hold it against.

2 of 2 entries carry independent evidence · Current values: /llms-full.txt

ETH price (USD)

api

Source: CoinGecko simple/price
Endpoint or contract: https://api.coingecko.com/api/v3/simple/price?ids=ethereum&vs_currencies=usd
Derivation: Taken as published. Every USD figure on the site inherits this price's accuracy.

Evidence

Cross-checked against the Chainlink ETH/USD aggregator on 2026-08-28: CoinGecko $2491 vs Chainlink $2490.35, 0.03% apart.

Caveats

A single price source is an assertion. The Chainlink cross-check below is what makes it evidence.

ETH price, on-chain (USD)

on-chain

Source: Chainlink ETH/USD aggregator
Endpoint or contract: 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419
Derivation: latestRoundData().answer / 1e8. Read via Multicall3 in the same on-chain batch as the rest.

Evidence

Verified on-chain 2026-08-28: bytecode present (9571 bytes), description() returns 'ETH / USD', decimals() returns 8, answer 249035000000 => $2490.35.

Caveats

latestRoundData() is used rather than latestAnswer() so staleness is visible: a round older than about an hour is treated as no value, not as a price.
Held as a cross-check. Where the two sources disagree materially that is reported, not averaged away.