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Converts electromagnetic wavelength in nanometers to photon energy in joules and electron-volts, and back, using exact physical constants for the speed of light and Planck's constant. For spectroscopy analysis, optics design, and astronomy agents working with light-frequency data.

Solid geometry calculator returning exact volume and surface area for spheres, cylinders, cones, cubes, and rectangular prisms from structured dimension inputs. Built for packaging design, tank and container sizing, construction estimates, and STEM education tools that need a checked number rather than a mental estimate.

Shape math calculator for area, perimeter, and diagonal length of circles, rectangles, and triangles from plain numeric dimensions — includes Heron's formula for triangles given three sides. Useful for flooring estimates, land-plot sizing, classroom geometry problems, and CAD pre-checks where an exact figure is needed, not an approximation.

Cron parser API: validate a cron expression and get its next 1-20 run times as ISO timestamps in any timezone. Instantly answers 'when will this fire?' for scheduler-building, automation, and DevOps agents. Invalid expressions return a clear unpaid 400.

Matrix math calculator for determinant, inverse, transpose, eigenvalues, and matrix multiplication or addition, on arrays up to 50x50. Built for graphics transforms, engineering simulations, and any workflow where a language model's mental arithmetic on matrices can't be trusted. Exact numeric output every call.

Cooking conversion API: cups↔grams↔tablespoons↔ml with ingredient-aware densities for 40+ ingredients (a cup of flour is 120g, a cup of honey is 340g). The kitchen math LLMs get wrong.

Geometry calculator API: area, perimeter, volume, and surface area for circles, rectangles, triangles, spheres, cylinders, cones, cubes, and prisms — from dimensions. Exact.

Wave physics API: convert between light wavelength (nm), frequency (Hz), and photon energy (joules and eV). Uses exact physical constants.

Least-squares linear fit calculator: pass paired numeric data and get back the best-fit line equation, slope, intercept, and goodness-of-fit score. For analytics dashboards, A/B result interpretation, and any pipeline that needs a quick, exact regression without spinning up a stats library.

Mortgage and loan payment calculator: enter principal, annual rate, and term to get the exact monthly payment, total amount paid over the life of the loan, and total interest owed. Built for home-buying estimates, amortization sanity checks, and personal-finance planning agents that need real numbers instead of a rough guess. Not financial advice — just exact arithmetic on the inputs you give it.

Percentile and outlier calculator: submit a numeric array and get p25, p50, p75, p90, p99 cutoffs plus IQR-based outlier flags alongside mean, median, and standard deviation. Useful for latency analysis, grading curves, pricing tiers, and any workflow that needs an exact distribution summary.

Today's (or any past day's) featured astronomy picture — title, plain-language explanation, media type (image or video), and full-resolution URL — as structured JSON. Pass an optional date (YYYY-MM-DD) to fetch a specific day's picture back to mid-1995. For daily-digest bots, content-scheduling agents, and space-education tools.

Chemical element reference: look up any of the 118 known elements by atomic number, symbol, or name and get atomic mass, electron configuration, electronegativity, melting/boiling points, density, and phase at room temperature. For chemistry homework, materials science, and lab-prep agents needing a quick, sourced fact check.

Fits a straight trend line through a set of x/y data pairs and returns slope, y-intercept, and R-squared fit quality. Useful for spotting growth trends, forecasting next values from historical data, and validating whether a relationship is actually linear before an agent bases a decision on it. Computed exactly, with no sampling error.

Loan payment calculator covering compound interest growth, monthly installment amounts, and return-on-investment math from plain numeric inputs — principal, rate, term, contribution. Useful for budgeting tools, debt payoff planning, and comparing financing offers side by side. Deterministic results an agent can cite without re-running the math itself.

Get dictionary definitions for a word — all senses labeled noun/verb/adjective, with pronunciation guide and a synonym/antonym list attached. One call replaces a definition query, a thesaurus query, and a spell-check: useful for writing assistants, tutoring bots, and content pipelines.

Periodic table reference returning full physical and chemical data — atomic mass, category, period, group, electron shells, melting and boiling points — for any element by name, symbol, or atomic number. Useful for science education tools, materials databases, and chemistry-adjacent content generation.

JSON to CSV converter API: turn an array of JSON objects (up to 10,000 rows) into a properly escaped CSV with a unified header row — nested values JSON-encoded, quotes handled correctly. For report generation, spreadsheet handoffs, and data-export agents. Processed in memory, nothing stored.

Generational slang dictionary spanning boomer to gen-alpha: look up what a slang term means (with origin generation, era, and a usage example), or pull random slang from a chosen generation. Around 200 curated real terms — skibidi to groovy — for agents translating across age groups or writing in-voice.

Parses any standard cron expression and computes its next 1-20 firing times in a chosen timezone, flagging malformed expressions clearly rather than letting a bad schedule silently fail in production. For scheduler tooling, CI pipelines, and agents that generate cron syntax and need to sanity-check it.

List every legal chess move for a position given as FEN, in both SAN (Nf3) and UCI (g1f3) notation, plus turn and check/checkmate/stalemate/draw flags. Pass 'start' for the opening position. For bots playing chess, validating opponents, or teaching the rules.

Converts an array of JSON objects, up to 10,000 rows, into a properly escaped CSV file with a unified header row, handling nested values and quoting automatically. For agents that produce structured JSON output but need to hand a client a spreadsheet-ready file instead.

The daily featured astronomy image or video, with title, explanation text, media type, and image URL, as normalized JSON. Optional date param for any day back to mid-1995. For content agents, daily-digest bots, and space-education tools.

Turns structured JSON arrays into spreadsheet-ready CSV, up to 10,000 rows, headers unified across objects, nested fields JSON-encoded inline, quotes escaped correctly. Useful for report generation, data exports, and any pipeline bridging an API response to a file a human opens in Excel or Sheets.