PegCheck is a real-time stablecoin health monitoring platform. It tracks 19 stablecoins ā including USD-pegged coins like USDT, USDC, USDS, PYUSD, LUSD, FRAX and BOLD, as well as EUR-pegged coins like EURC ā and flags any peg deviation the moment it happens. Each coin is tracked against its own individual peg target and threshold. DEX divergence is also monitored via Uniswap V3, showing when on-chain pool prices diverge from the off-chain consensus. Premium subscribers receive instant email alerts when any coin depegs.
Why we built it
In 2022 TerraUSD collapsed almost overnight, wiping out billions in savings. Most people had no idea it was happening until it was too late. PegCheck exists so that never happens to you without warning. Be first to know. Before the market reacts.
Who is it for?
Anyone holding or using stablecoins. You don't need to be a trader or a crypto expert. If you have money in USDT, USDC or any other stablecoin, you deserve to know the second something goes wrong.
How it works
PegCheck pulls live price data every 60 seconds from 7 independent sources ā CoinGecko, Coinbase, Binance, Kraken, DefiLlama, Chainlink and Uniswap V3 ā and calculates a median consensus price to eliminate bad data. A dual-source confidence score flags when fewer than two sources agree. Each coin is evaluated against its own peg target and per-coin thresholds: most coins use Ā±0.1% healthy / Ā±0.5% caution, while coins designed to trade slightly above peg (like LUSD and mkUSD) use wider bands. Green means healthy. Amber means caution. Red means depeg detected.
Roadmap
ā Multi-source price feeds
Live ā prices aggregated from CoinGecko, Coinbase, Binance, Kraken, DefiLlama, Chainlink and Uniswap V3. Median calculation protects against bad data.
ā Historical data & charts
Live ā 7, 30 and 90 day price charts for every stablecoin we track.
ā Collateralisation ratios
Live ā reserve breakdowns and collateral ratios for every coin.
ā Reserve transparency
Live ā audit dates, auditors and transparency scores for every coin.
ā Large transaction tracking
Live ā significant on-chain movements flagged automatically.
ā REST API with authentication
Live ā real-time stablecoin data API with Bearer token auth, 3 pricing tiers and 30 day free trial.
ā Developer dashboard
Live ā API customers can view their key, usage stats and calls remaining at pegcheck.uk/dashboard.
ā Chainlink Proof of Reserve
Live ā on-chain verified reserve data for supported stablecoins, powered by Chainlink.
ā On-chain depeg event logging
Live ā every depeg event is permanently recorded on the Sepolia blockchain and publicly verifiable at pegcheck.uk/onchain.
ā Depeg History Page
Live ā full historical depeg events, stability rankings, all-time lows and most stable coins across all 19 tracked stablecoins.
ā DEX Divergence Monitoring
Live ā Uniswap V3 pool prices cross-checked against consensus for USDC and USDT, divergence shown in basis points on each coin detail page.
ā 19 Stablecoin Coverage
Live ā expanded from 8 to 19 coins including FRAX, GHO, crvUSD, LUSD, USDP, USDD, mkUSD, EURC, DOLA, alUSD and BOLD.
ā Individual Peg Targets
Live ā each coin tracked against its own peg (USD or EUR), with per-coin healthy/caution/depeg thresholds tuned to each coin's design.
ā Wallet integration
Live ā connect your wallet to see only the stablecoins you hold, with balances, USD values and live health status.
ā Weekly Risk Reports
Live ā professional stablecoin risk report sent every Monday. 19 coins, whale activity ($250M+ tracked weekly), market scoring, and trend analysis. Available via pegcheck.uk/alerts.
š ļø For Developers
Building a wallet, exchange, or DeFi app? PegCheck offers a REST API with real-time data for all 19 stablecoins ā prices, deviation, status, depeg history and Uniswap V3 DEX divergence (via the uniswap field in the response). Powered by 7 independent sources with median consensus.