Kimchi premium - Upbit KRW price vs global USD price for a coin, with premium percent adjusted for the live USDT/USD rate, implied KRW per USD and 24h change

Crypto slippage - what a USD trade size costs on the Coinbase, Kraken, Bitstamp and Gemini order books, with spread, average fill price, slippage percent and best venue to buy or sell

DeFi protocol fees - top protocols by 24h fees or revenue on any chain with 7d and 30d totals, category filter and change percent

Stablecoin supply and peg - circulating supply, price, peg deviation, 1d/7d/30d change and top chains for USDT, USDC and 300+ stablecoins

FEMA disaster declarations by state, year or incident type - declaration number, hurricane, flood or fire, aid programs and designated counties

ECB key interest rates - main refinancing, deposit facility and marginal lending rates with effective date, last change in basis points and rate-change history

Crypto hacks and exploits - DefiLlama database of 1,300 incidents with amount lost, chain, technique, classification and totals by year, filterable by chain

Ethereum Layer 2 ranking - L2BEAT total value secured, share, 7-day change, stage, category and stack for Base, Arbitrum, Optimism and 90+ rollups

US economy snapshot - fed funds, CPI and core inflation, unemployment, payrolls, GDP, mortgage rate, Treasury yields, VIX, oil and jobless claims with changes and year-over-year

Base64 encode and decode text - returns standard and URL-safe base64, or the decoded text with UTF-8 detection

Economic data series - latest value, change, year-over-year, window high and low and recent history for any FRED series such as unemployment, CPI, fed funds or GDP

Denmark electricity spot price - current and day-ahead Nord Pool price per MWh and kWh for DK1 or DK2 with the cheapest slot, from Energinet

Dice roller - any number of faces and dice, with each roll and the total

Canadian dollar exchange rate from the Bank of Canada - daily USD/CAD, EUR/CAD and other pairs with recent history and day-over-day change

HTML escape and unescape - convert special characters to HTML entities and back

EU unemployment rate by country - latest monthly rate, change vs last month and year ago, and a series for any Eurostat member state

Open natural disasters - NASA EONET wildfires, severe storms, volcanoes, floods and ice events with location, magnitude and source link

CFPB consumer complaint search by company or topic - product, issue, company response and narrative from the US federal complaint database

IBAN validation with ISO 7064 MOD 97-10 checksum - country code, check digits and pass/fail

FEMA Assistance to Firefighters award search by state, recipient and fiscal year - amounts and programs