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Inflation calculator — Adjust an amount between years using CPI (any country, not just US).

NAICS lookup — Official 2022 NAICS code → title, hierarchy, children; or keyword search.

Withdraw agent ETH balance to USDC (mutates: gas + swap)

Subscribe to opportunity webhook alerts (creates ongoing webhook resource)

Latest version, description, license, weekly downloads (via api.npmjs.org) and homepage for an npm package

Photon energy API: convert between electromagnetic wavelength (nm), frequency (Hz), and photon energy (joules and electron-volts) using exact physical constants (c, Planck's h). Give a wavelength or a frequency and get the full set. For optics, spectroscopy, physics, and astronomy agents.

Computes the current moon phase name and illumination percentage for any date and location, alongside sunrise, sunset, and solar noon, all calculated directly from astronomical formulas rather than looked up from a table. For agriculture apps, astrology content, and outdoor-event planning tied to lunar cycles.

Recipe measurement converter for cups, tablespoons, teaspoons, milliliters, liters, fluid ounces, grams, kilograms, ounces, and pounds — including volume-to-weight conversion using real ingredient densities for flour, sugar, butter, honey, rice, and 40+ others. For recipe scaling, meal-prep apps, and grocery-list agents.

Look up what an English word means: every dictionary sense with its part of speech, plus pronunciation, syllables, synonyms, and antonyms in a single structured response. Misspellings come back with did-you-mean suggestions, so an agent can self-correct and retry in one round trip.

Equation solver API: solve linear (ax+b=0), quadratic (ax²+bx+c=0, with real OR complex roots and the discriminant), and 2×2 linear systems — from structured numeric coefficients, not a parsed string. Exact roots every time. For engineering, education, and scientific agents.

Vocabulary builder serving GRE/SAT-caliber words: each entry has a precise definition, part of speech, natural example sentence, three synonyms, and an advanced/expert difficulty tag. Pull 1-10 random words, filter by difficulty or starting letter. 150 curated entries for tutoring agents, word-of-the-day bots, and test prep.

Cryptographic random number draw with a revealed server seed for after-the-fact verification: combine it with your own client seed to get a number in your chosen range that neither party could have predicted or manipulated in advance. For games, sampling, and fair-assignment logic between untrusted parties.

Astronomy photo of the day API: today's featured space image with title, high-res URL, and the full astronomer-written explanation, as JSON. Use for daily content feeds, newsletters, screensaver bots, and education agents. Cached 6 hours.

Converts cooking measurements between volume units (cups, tbsp, tsp, ml, l, fl-oz) and weight units (g, kg, oz, lb), using ingredient-specific densities so a cup of flour and a cup of honey convert to their correct, different gram weights. For baking apps and recipe-scaling agents.

Check whether a chess move is legal in a given FEN position and get the board state after it: resulting FEN, capture info, and whether the move gives check. Illegal moves return a clear verdict instead of an error, so game bots can handle bad input gracefully.

GRE and SAT vocabulary practice API: draws from 150 curated high-difficulty words — perspicacious, recalcitrant, ephemeral tier — each with definition, usage example, synonyms, and an advanced/expert rating so study agents can ramp difficulty as learners progress.

What does that gen-z or gen-alpha term actually mean? Curated slang glossary with meaning, era, and example usage per term, filterable by generation from boomer through gen-alpha. For moderation bots, marketing copy checks, and assistants keeping up with how different audiences talk.

Solves quadratic equations (ax squared + bx + c = 0) from numeric coefficients, returning both roots — real or complex — along with the discriminant. Also handles linear equations and small 2x2 systems. For algebra homework checking, engineering calculations, and any agent that needs exact roots instead of an approximated answer.

Cooking measurement API: convert between cups, tbsp, tsp, ml, l, fl-oz, grams, kg, oz, lb — including volume↔weight using typical densities for 40+ ingredients (flour, sugar, butter, honey, rice...). A cup of flour is 120g but a cup of honey is 340g. For recipe scaling and grocery agents. Density results labeled approximate.

Random advanced English word with everything needed to teach it: dictionary-quality definition, part of speech, example sentence in context, and three synonyms. Filter by difficulty tier or first letter to build themed streaks. Made for daily-post bots and learning apps.

Equation solver for linear equations, quadratics with real or complex roots, and 2x2 systems of linear equations, given structured numeric coefficients rather than a text expression to parse. For engineering checks, math tutoring tools, and agents that need guaranteed-exact algebraic solutions.

Equation solver API: exact roots of linear and quadratic equations (real and complex) and 2-variable linear systems, from structured coefficients. Real algebra, not a guess.

Descriptive statistics calculator returning mean, median, mode, standard deviation, and full percentile breakdown (p25/p50/p75/p90/p99) for a numeric dataset, plus IQR-flagged outliers. For dataset summarization, benchmarking, and reporting agents that need exact figures, not an LLM's rounded estimate.

Random draws from a curated advanced-English word list, one to ten at a time, each entry carrying part of speech, a precise one-sentence definition, an example sentence, and synonyms. Deterministic dataset with stable entries — the same word always teaches the same meaning.