Converts absolute Kelvin temperatures to and from Celsius, Fahrenheit, and Rankine with exact scientific precision. For physics and chemistry calculations, materials-science thresholds, and any agent working with thermodynamic data where an approximate conversion isn't good enough.

Encyclopedia summary API: the lead summary of any English-language encyclopedia article — title, one-line description, extract paragraph, thumbnail, and canonical URL — as JSON. For entity enrichment, fact grounding, and knowledge agents. CC BY-SA content with attribution included.

Determines the language of any input text with a confidence score and runner-up candidates, useful when a short snippet is ambiguous between closely related languages. For content routing, translation triage, and multilingual pipelines that need a fast, deterministic language call instead of an LLM guess.

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.

Unit conversion tool covering length, weight, volume, area, speed, pressure, energy, and digital storage, with exact factors for over 100 unit types. Deterministic and reproducible, so an agent can cite the converted figure directly instead of spending reasoning tokens re-deriving it and risking an arithmetic slip.

Linear regression API: slope, intercept, R-squared, and the equation of the best-fit line through your x/y data points. Least-squares, exact.

Linear algebra operations on numeric matrices: multiply, add, transpose, invert, or find determinants and eigenvalues from structured array input. For robotics, computer graphics, systems-of-equations solving, and scientific computing agents that need reliable matrix arithmetic without hallucinated entries.

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.

Linear regression API: fit a least-squares line through paired x/y data and get slope, intercept, R-squared goodness-of-fit, and the line equation. For trend analysis, forecasting inputs, and data-science agents. Exact and deterministic.

Link destination checker: reveals where a shortened or forwarding URL actually leads before you click it, returning the final resolved address and the full hop-by-hop redirect path. Protected against internal-network targets. Built for phishing triage, affiliate-link auditing, and safety screening ahead of automated browsing.

Link preview data extraction: pulls the title, description, thumbnail image, and social-sharing tags from any public web page so you can render a rich preview card without loading the page yourself. Guarded against internal-network requests and capped at 512KB. For chat apps, bookmarking tools, and content aggregators building link previews.

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.

Lobbying disclosure filings: who is lobbying the US federal government, for whom, and on what — quarterly registrations and reports with client, lobbying firm, income or expenses, specific issues text, and the individual lobbyists named on each filing. Filter by client company, lobbying firm, or year. Follow-the-influence data for policy, market-intel, and accountability agents.

Point-and-radius earthquake search backed by the official government seismic seismic catalog: pass a latitude, longitude, and radius to get every quake above a magnitude threshold in that area, with depth, time, and tsunami flag. Use for site-specific hazard checks, facility-risk dashboards, and agents that need earthquake exposure for one location rather than a global stream.

Real-time local weather — temperature, feels-like, humidity, wind speed, and condition code — plus a 3-day forecast of highs, lows, and rain probability for any latitude/longitude. For assistant agents, logistics planning, and event scheduling that need current and near-term conditions in one call. Updated every 10 minutes.

On-demand QR code creation from plain text or a URL, configurable size from 128 to 1024 pixels with medium error correction baked in, returned as a base64 PNG with nothing retained afterward. Useful for payment links, business cards, table tents, and any workflow that needs a fresh scannable code generated in milliseconds rather than through a design tool.

Marine conditions API: current wave height, wave period, swell wave height, and sea surface temperature for any ocean latitude/longitude worldwide, as structured JSON from a global marine weather model. Use for shipping, boating, surf forecasting, and offshore-operations agents. Coverage is open water only — points far from any ocean may return null values. Cached 10 minutes.

Math fact generator for integers: computes a bundle of properties for any number you supply, primality, factorization, perfect-square status, Fibonacci membership, and alternate representations in binary, hex, and Roman numerals. Deterministic and instant, with no external lookup involved. Good for trivia games, validation logic, or satisfying idle curiosity about a specific integer.

Linear algebra API: determinant, inverse, transpose, eigenvalues, multiply, or add matrices up to 50x50 with structured array inputs — exact computation, instant. The linear algebra LLMs can't do reliably in-context. For engineering, graphics, and scientific agents.

Descriptive statistics API: feed up to 100,000 numbers and get count, sum, mean, median, mode, sample standard deviation, variance, min/max/range, percentiles (p25/p50/p75/p90/p99), and IQR-flagged outliers. Deterministic and auditable — cheaper than burning reasoning tokens, zero arithmetic-hallucination risk, and the result can be cited. For data QA, monitoring, and analysis agents.

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.

Matrix math API: determinant, inverse, transpose, eigenvalues, multiplication, and addition for matrices up to 50x50 — exact linear algebra.

Produces an MD5 hash, or SHA-1, SHA-256, SHA-512 on request, of any text input as a hex digest, computed instantly with nothing stored. Useful for legacy checksum compatibility, quick fingerprinting, and integrity checks in pipelines that still expect an MD5 value alongside newer algorithms.

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.

General-purpose measurement converter spanning length, mass, volume, area, speed, pressure, energy, power, and digital storage across 100+ units, with exact conversion factors computed instantly. For engineering specs, recipe scaling, shipping calculations, and any agent translating between metric and imperial systems.

Converts between metric and imperial units — meters to feet, kilograms to pounds, liters to gallons, and 100+ other unit pairs across length, mass, volume, and more — with exact factors and no rounding surprises. For international shipping, engineering handoffs, and travel-planning agents.

Metric-imperial conversion API: miles↔km, lb↔kg, °F↔°C, gallons↔liters and 100+ more units, one call, exact factors. Deterministic and auditable — cheaper than burning reasoning tokens, zero arithmetic-hallucination risk, and the result can be cited.

Minute-level precipitation nowcast for the next 2 hours (15-minute steps) for any point on Earth, as structured JSON. Built for agents that need a near-term rain call rather than a daily or hourly forecast. Accuracy depends on regional radar coverage — strongest in the US and Europe, weaker elsewhere.

Molar mass API: compute the molecular weight of any chemical formula in g/mol — handles nested parentheses (Ca(OH)2, Fe2(SO4)3) and hydrates (CuSO4·5H2O). Returns the total, atom count, and a per-element breakdown with mass percentages. For chemistry, lab, pharma, and education agents.

Mole-to-mass-to-molecule-count converter for any chemical formula: supply a mass in grams or an amount in moles and get the full conversion set computed from the compound's exact molar mass. Useful for lab calculations, dosage prep, and chemistry education tools.

Molar mass API: the molecular weight of any chemical formula (H2O, C6H12O6, Ca(OH)2, CuSO4·5H2O) in g/mol, with a per-element mass breakdown and mass percentages. Nested groups and hydrates supported.

Mole conversion API: for any chemical formula, convert between grams, moles, and number of molecules using the formula's molar mass and Avogadro's number. Give grams or moles and get all three. For stoichiometry, lab prep, and chemistry education 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.

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.

MP4 to MP3 API: extract the audio track from any public video URL as an MP3 (192k), on our own hardware. 25MB input cap. Use before transcription or for audio archiving. Files deleted after processing.

Validate an email address's syntax and confirm its domain has live mail servers configured (MX records, falling back to A record), returning the parsed domain and sorted mail hosts. For cleaning contact lists, pre-checking signup forms, and CRM enrichment agents that need to filter out addresses that can never receive mail.

Query mail server (MX), address (A/AAAA), text (TXT), or any other DNS record type for a hostname, with DNSSEC validation status and the full set of returned records — name, type, TTL, and data — as JSON. Useful for checking email deliverability setup, verifying domain ownership, and infrastructure monitoring. Results cached 5 minutes.

Pull authoritative registration data for any domain name — registrar, nameservers, status codes, and the registration, update, and expiry dates — across gTLDs and most country-code TLDs. Built for availability checks, ownership research, and expiry-monitoring agents that need a single structured record instead of parsing raw registry text. Cached 24 hours.

Resolve the nameservers, mail servers, or any other DNS record type for a hostname, with DNSSEC status included in the response. Useful for confirming a domain migration completed, diagnosing email delivery issues, or validating that infrastructure changes propagated correctly. Answers are structured JSON and cached for 5 minutes.

Text narration API: turns up to 2000 characters of written text into spoken audio, choosing from five male and five female voice options, returned as base64-encoded WAV. Nothing typed is stored. Good for audiobook snippets, accessibility read-aloud features, and adding a voice layer to otherwise silent notification systems.

One featured space image or video per day, with a written explanation, media type, and direct image URL, as structured JSON. Optional date param retrieves any past day's picture. Built for content-generation agents, daily-newsletter bots, and novelty/education feeds that want a fresh space visual with zero curation effort.

Full public holiday calendar for any of 110+ countries and any year — date, local-language name, English name, whether it's observed nationwide, and which subdivisions recognize it — as structured JSON. Used by payroll systems, delivery schedulers, and SLA calculators that need to know which dates are actually business days.

A worldwide feed of currently open natural events — wildfires, storms, volcanic activity, floods, earthquakes, sea/lake ice, drought, and more — as structured JSON with per-event title, category, source, and latest position/magnitude. Complements US-only NWS and USGS hazard feeds with global reach. Optional category filter and result limit. Legitimately returns an empty list when a filtered category has no open events.

Near-earth object feed: asteroids passing close to Earth this week — name, size estimate, closest-approach date and distance, relative velocity, and potentially-hazardous flag, as normalized JSON. For risk, science, and content agents.

Precipitation broken into 15-minute intervals for the next 2 hours at any latitude/longitude, for short-horizon 'is it about to rain' decisions. Use for last-mile delivery timing, outdoor-event go/no-go calls, and field-service dispatch. Best coverage in radar-dense regions (US, Europe); other regions may show low-resolution model estimates.

Returns normalized metadata for any npm package, current version, license, dependency list, and whether it's been deprecated, without needing to parse the full, much larger raw registry response. For agents auditing a project's dependency tree or deciding what to install.

npm package inspection API: latest version, publish date, license, deprecation status, dependency count, and maintainer count for any npm package. Dependency hygiene for coding agents, cached hourly.

npm package info API: the latest published version of any npm package with its publish metadata, license, declared dependencies, deprecation notice if any, and dist details — the pre-install check coding agents should always run. Scoped packages: URL-encode the slash. Cached 1 hour.

Looks up the latest published version of any npm package along with its license, declared dependencies, publish date, and deprecation status, the check a coding agent should run before adding a dependency to a project. Remember to URL-encode the slash in scoped package names.

Number facts API: everything mathematically interesting about any integer — is it prime, its prime factorization, Fibonacci membership, perfect-square status, even/odd, binary and hexadecimal forms, Roman numeral, and digit sum. Computed locally, deterministic, instant. For quiz agents, content generation, validation, and the incurably curious.