Explore APIs

Beer, wine and cider alcohol by volume from original and final gravity, with both standard formulas and attenuation.

WCAG contrast ratio between two hex colors with AA and AAA pass/fail for normal and large text.

Age in years, months, days and days lived, Korean and East Asian ages, next birthday with leap-day rules, and zodiac.

Dynamic range, levels and smallest step for a PCM bit depth, theoretical SNR, and the bit depth needed for a dB range.

Real-time L2 sequencer health across 12 chains (Base, Arbitrum, Optimism, zkSync, Blast, Linea, Mantle, Mode, Scroll, Taiko, Polygon zkEVM, Casper). Returns kernel-level P99/P95 RTT from eBPF probes, revert ratios (Base and Arbitrum via eth_getBlockReceipts), gas pressure, and execution recommendation.

Find US court cases, opinions and dockets naming a business, with case name, court, date, citation, docket number and nature of suit.

Elevation at a location and what it does: air pressure, boiling point of water, air density and oxygen versus sea level.

Complex number arithmetic, modulus and argument, integer powers, square root and n-th roots, in rectangular and polar form.

Battery runtime estimate from capacity (mAh and volts, or Wh) and load (mA or W), with efficiency and usable depth of discharge.

Most extreme perp funding right now across Hyperliquid, filtered by open interest. Top crowded longs and shorts.

One-call company snapshot from SEC data: profile, filing freshness, red-flag filings, insider filing count and LEI.

Bond type between two elements from the Pauling electronegativity difference: nonpolar covalent, polar covalent or ionic.

secp256k1, P-256 and P-384 public parameters (p, n, G) from SEC 2, with an on-curve check of a public point.

Asteroids and comets passing Earth within a lunar-distance limit in the next or last N days: distance, speed, size range.

Cosine similarity of the word-count vectors of two texts, with shared terms and vector norms.

Name a chord from its notes (C E G Bb, A C E G): best name, inversion and alternative names; first note is the bass.

A/B conversion test: rates, relative lift, two-proportion z-test p-value, confidence interval and a significance verdict.

Determinant of a square matrix (up to 10x10) by LU with partial pivoting, flagging a numerically singular matrix.

Body mass index from weight and height, metric or imperial, with the WHO adult category and the 18.5 to 24.9 weight range.

Confirmed exoplanet discovery counts by year and by detection method, with totals, the peak year and a cumulative series.

Compare growth classes (n, n log n, n^2, 2^n, n!) at a given n: operation counts, run time, largest n a time budget allows.

Country for an ITU E.164 calling code or international number prefix, such as +44 or +1 876; flags shared codes.

Board feet for lumber from thickness, width, length and quantity (nominal sizes), with total cost at a price per board foot.

Estimate quarter-mile time and trap speed from weight and horsepower (Hale), plus a power-limited lower bound for 0-60 mph.

Hargreaves reference evapotranspiration (mm/day) from max and min temperature, latitude and day of year.

Bitcoin network health: tip height, block pace vs 10 minutes, difficulty retarget forecast, hashrate trend and Lightning size.

Cadence needed to hold a target speed in a given gear, and the chainring-to-cog ratio needed for a speed at a cadence.

Supported perpetual-futures trading pairs — the list of symbols (BTCUSDT, ETHUSDT, …) the funding-rate scanner and signals cover, as a clean snake_case envelope.

Great-circle distance (miles, km, feet, nautical miles) and initial compass bearing between two latitude/longitude points.

Score needed on a final exam (or any remaining work) to reach a target class grade, from current grade and its weight.