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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.

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.

Restaurant recommendations from the Blackbird network (~2,000 curated restaurants, mostly NYC and San Francisco). Full-text search plus city/neighborhood filters, with complete specials on every result, refreshed daily from a cache (never a live call) — e.g. every West Village restaurant with its current Fly-reward offers in one call.

Should my agent pay this expensive x402 endpoint? Call it before a costly or repeated payment. Returns the go / caution / no_go verdict plus the full diagnosis, the endpoint's check history per day over 30 days, how reliable the seller's other endpoints are and whether the endpoint moved domains. Never pays the endpoint. Bulk: 1000 credits for $0.80 via /api/v1/credits.

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.

Smart contract security and token risk check before you trade, approve, bridge or integrate: deterministic 0-100 risk score for any deployed contract on 20 EVM chains. Flags rug-pull levers (owner mint, blacklist, pause, adjustable fees, upgradeable proxy, ownership not renounced), SELFDESTRUCT/DELEGATECALL, verified source and aderyn static analysis. Read-only. Errors (400 bad input, 422 not a co

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.

Parse a scientific name into genus, species epithet, subspecies or variety, authorship and year, and check capitalisation.

Tip and even bill split in exact cents: tip on subtotal or total, shares that add up, optional round up to whole dollars.

Write a money amount in words for a cheque (EN/ES/FR/DE): you give the currency names, no rates; words or 56/100 cents.

Camelot wheel code for a musical key and its harmonic-mixing matches; optionally test if two keys mix.

Is a date a public holiday in a country? Also whether it is a business day and the next holiday after it.

Check a list of license ids against SPDX: current, deprecated or unknown, with the modern GNU -only / -or-later form.

Parse CSV text (quotes, escaped quotes, embedded commas and newlines) into JSON rows, detecting the delimiter.

Validate a 9-character CUSIP security identifier check digit and split issuer and issue codes.

Estimate a monthly electricity bill from kWh with block-tier rates, a fixed monthly charge and a tax or fee percentage.

Break-even units and revenue from fixed costs, unit price and unit variable cost, plus profit at a target volume.

Compare a file name's extension with its real type from the first bytes; flags executables disguised as documents or images.