Validate a Litecoin address before sending: base58check and bech32 checksum, address type, wrong-network detection, OFAC screening, and a send verdict for agents.

Validate a Linea address before sending: checksum, wrong-network check, live account type and balance, OFAC screening, and a send verdict of ok, caution or do_not_send.

Validate a Kusama address before sending: SS58 checksum, wrong-prefix detection for Polkadot and generic Substrate keys, OFAC screening, and a send verdict for agents.

Eurostat statistics by dataset code and filters - unemployment, GDP, inflation and trade for EU countries as a clean time series with dimension labels

World Bank Open Data for any indicator code and up to ten countries over recent years, with latest value, period change and the indicator definition.

Transaction fee in native token and USD for a transfer, swap, mint, approve or custom gas amount on any EVM chain, from base fee, tip and token price.

Risk statistics for a price or return series: Sharpe, Sortino, Calmar, max drawdown, historical and parametric value at risk, CVaR, volatility and win rate.

Compare two loan offers - payment, total interest, upfront fees, cheaper loan over the full term, break-even month and cost over your holding period

Investment return after fees, tax and inflation: real after-tax rate, future value in nominal and todays dollars, and purchasing power lost on cash.

Refinance comparison: new payment, months to recoup closing costs, remaining interest on each loan and lifetime savings, with optional costs rolled into the loan.

Discounted cash flow valuation - projected cash flows, terminal value, enterprise and equity value, value per share and a discount and growth sensitivity table

Financial independence calculator - FI number from expenses and withdrawal rate, years to reach it, milestones and savings needed to get there in 20 years

US ground elevation in meters and feet for one or up to ten coordinates from the USGS 3D Elevation Program, with highest and lowest point

Depreciation schedule for an asset - straight-line, declining-balance with any factor or sum-of-years digits, with yearly expense and book value

Bank Negara Malaysia ringgit exchange rates - interbank buying, selling and middle rates per currency with the unit, session and date

Solve the true APR and effective annual rate of a loan from amount, level payment, number of payments and upfront fees, with total cost of credit.

Accurate WGS-84 distance and bearings between two coordinates with Vincenty, or the destination point from a start, bearing and distance

Weighted average cost of capital from equity and debt values - CAPM cost of equity from beta, after-tax cost of debt, capital weights and the tax shield

Convert latitude and longitude to a Military Grid Reference System string with UTM zone, easting and northing at 1 m to 100 km precision, or MGRS back to coordinates

Turkish lira exchange rates from the central bank TCMB - forex and banknote buying and selling rates for USD, EUR, GBP and dozens more, with the bulletin date