Build "Squeek Appraiser": a single-page buyer's tool that shows exactly what a Squeek NFT is worth to its next owner before they buy it, and compares up to three Squeeks side by side with a clear "best pick" and the reasons. Squeekchain's docs ask for exactly this ("Squeek marketplaces and valuation tools: show a buyer exactly what a Squeek would yield"). It is a decision tool, not an explorer.

SOURCES (read these first; never answer from memory)

• Docs and safety rules: https://docs.squeekchain.com/llms-full.txt (Squeeks, Power, Merging, Ownership, Staking, API, SqueekMining).
• Public API, CORS *, no key, base https://api.squeekchain.com/v1. Big numbers are decimal strings: parse with BigInt. "status":"unavailable" means unknown, never zero. Respect 429 Retry-After.
  • GET /squeeks/{tokenId}: level, basePower, mergeState ("ready" | "cooldown"), nextMergeHeight, custody {owner, depositor, stray, burned}, metadata {name, attributes[], imageDataUri (onchain SVG)}, economy {coreBlockHeight, currentRound, mergesOpen, stakingPaused, maximumLevel}.
  • GET /economy/state: identities (core, token, mining, staking proxy addresses), staking {totalNftPower, totalSqkPower, sqkPerPower, rewards}, mining, supply.
  • GET /accounts/{address}: tokens[] {tokenId, level, basePower, custody, nextMergeHeight, mergeState}, power, rewards, 7-day earnings[].
  • GET /settlements?range=7d: summary.completedBlockCount and buckets, to estimate Squeek blocks per day.
• Contracts on Sepolia (verify addresses from /economy/state identities and the docs' deployment record, not from this text): SqueekNFT ownerOf/tokenURI; SqueekMining weightForLevel(collection, level) and cooldownBlocks(collection, level) for the full level table. Use a public Sepolia RPC for reads only. Observed on 31 Oct 2026 (use only to sanity-check, always read live): Level 1 power 1000, Level 2 power 2200, Level 2 merge cooldown ~3000 Squeek blocks; Squeeks held by the staking proxy have custody.owner = staking proxy and a depositor.

WHAT A BUYER SEES PER SQUEEK

• The onchain image (render imageDataUri as an , never inline SVG markup) and traits.
• Level and power, plus the full level ladder from weightForLevel so they see what the next level is worth.
• Earning status: "Earning: in staking" when the staking proxy holds it, "Not earning: in wallet" otherwise. Explain that a staked Squeek must be withdrawn by its depositor before it can be transferred and stops earning until the buyer deposits it again.
• Share of every staking reward = power / (totalNftPower + totalSqkPower), shown as "once deposited" when it sits in a wallet.
• Rewards attachment: state clearly whether any unclaimed SQK travels with this Squeek in the current release (read it; in the observed release rewards accrue to the depositor's account, so "none attached").
• Merge readiness: "Ready" or "N Squeek blocks left (about X days at the 7-day pace; slower when Squeektoshi rests)". Never imply he should run more.
• A pre-trade checklist from the Ownership docs: re-check custody, level, scheduled power change and cooldown in the same minute as the trade; the seller can still act until the transfer executes.

COMPARE AND DECIDE

• Up to three token IDs, each with an optional asking price in ETH (any decimal input, comma or dot).
• Optional "my wallet" address (read-only, typed in, no wallet connection required) to load the Squeeks the buyer already owns, so the tool can flag merge partners: same level, both ready -> "Merges today into Level N+1 (power P)".
• A side-by-side table (level, power, earning, pool share, cooldown blocks, price, power per 0.01 ETH, merges with yours) with the winner of each row highlighted.
• A verdict card: "Buy Squeek #X if you buy one of these" with 2-4 plain reasons. Score = power per ETH, +25% if it merges with a Squeek the buyer owns today, -10% if it must leave staking first. Show this formula under a "How we score" disclosure.
• Shareable state in the URL hash (#ids=12-45-301&prices=0.02-0.01-0.008) so buyers can send a comparison to a seller.

DESIGN

• An appraiser's desk: warm paper background, ink text, one green accent for good signals, amber for caution, red for blockers. Fraunces for headings, IBM Plex Sans for body, IBM Plex Mono for numbers with tabular figures. Light and dark themes via prefers-color-scheme.
• Loading skeletons per card; clear errors ("Squeek #123 does not exist or was burned in a merge").
• Works on phones: inputs stack, cards stack, the comparison table scrolls inside its own box.

RULES

• Read-only. No wallet connection, no transactions, no signatures, no private keys, no tracking, no backend. Never take token IDs or amounts from the API into a transaction.
• Label every estimate as an estimate and show where each number came from (a small "source" link per value: API endpoint or contract call).
• Testnet SQK and Squeeks have no monetary value; say so in the footer next to "Reads Squeekchain's public API and Sepolia contracts. Nothing is signed."
• Pure static HTML/CSS/JS, no build step required. Host on IPFS/ENS and deliver the code to GitHub with a README that documents every data source and the scoring formula.