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Critical depth where Froude number is 1 (Q^2/g = A^3/T) for rectangular, trapezoidal, triangular or circular channels.

Smart home device recommendations and ecosystem advice for any country: Matter compatibility, ecosystem fit (Alexa, Google Home, Apple HomeKit), device picks by room and budget, and local plug/voltage/availability notes. For homeowner and smart-home agents. Returns recommended devices with Matter certification status and practical setup guidance.

Floyd-Warshall all-pairs shortest distances for up to 100 nodes; negative weights ok; detects negative cycles.

Convert kanji-mixed Japanese (JP) text to hiragana, katakana, or romaji (Hepburn/Nippon/Passport), with a per-token breakdown of surface form, reading, and part-of-speech. Backed by the kuromoji morphological analyzer. Use to generate ruby readings, build search indexes, or preprocess text for speech synthesis.

Find a site's RSS and Atom feeds from a page URL: declared alternate links, else 5 common feed paths probed on the host.

FDA drug label lookup — the newest prescribing information for a brand or generic drug name: boxed warning, indications, dosage, contraindications, warnings, adverse reactions and drug interactions as previews or one section in full, plus manufacturer, route, RxNorm, UNII and application numbers. Use to read what a drug is approved for and its official warnings.

Canonical in-universe chronology for fan and entertainment agents. Returns eras, pivotal events, watch/read order, and lore gaps for major franchises.

Daily mean PM2.5, PM10, ozone, NO2 and US AQI over a date range, plus the count of days above an AQI threshold.

Analyze text (max 2000 chars): emoji count, distinct emoji, grapheme clusters, unqualified and text-presentation forms.

Battery bank layout (series and parallel counts) and runtime from load, voltage, Ah, depth of discharge and efficiency.

Check a US ABA routing number: 3-7-1 weighted checksum and the Federal Reserve district from the prefix.

A country's postal address layout: line order template, required fields, uppercase rules and field labels.

Elo rating update after a game: win probability for each side, new ratings and the points exchanged.

Resolve a company name, website domain, registry number, LEI or VAT number to its official legal entity: registry, registry number, legal form, status, address, industry codes, size where published and LEI. Searches national registers (Norway, Finland, Czechia, Slovakia, France, UK, Latvia; Poland by KRS number) and GLEIF, scores the match and links every record to its source. Company-level only:

Grade 1 Braille text to Unicode Braille cells and back, with number sign, capital sign and dot numbers per cell.

Search current Japanese (JP) National Diet members by name (kanji, kana, or romaji), party, or constituency. Returns matching members with their canonical ids for use with GET /members/:id. Use to resolve a politician name to a record.

US border wait times: live CBP waits at all 85 US-Mexico and US-Canada land ports of entry, ranked by drive time plus wait for each lane (standard, SENTRI/NEXUS, Ready Lane, FAST) for passenger, commercial or pedestrian traffic. BorderScout

eBay listings search — live prices, condition, shipping, seller reputation, auctions & Buy It Now across supported regional eBay sites, with category, price band, condition, seller & location filters, sorted, as clean JSON.

Dog and cat symptom checker / pet symptom triage for pet-owner and vet agents. Returns an urgency rating (emergency vs home-care) and home-care guidance for symptoms in dogs, cats, birds, rabbits and other species worldwide. Pet-info guide, not a veterinary diagnosis.

Scientific and academic paper search: research papers and scholarly literature from arXiv, PubMed, OpenAlex, Crossref and Semantic Scholar in one call, deduplicated and retraction-aware. Each hit: DOI, authors, venue, snippet, citation count and citations per year, type, open-access PDF link. Sort by relevance, recency, citations or impact. Keyless. For literature review and citing research.

Use when you have a company domain and need to know what the company is before spending more. Returns the company name and site title, domain age, registrar, mail provider, DNS provider, DMARC and HTTPS status, and a count of the third-party vendors detected. One call, no signup, no API key. The cheapest way to qualify a domain before buying a fuller record.

Hacker News stories linking to a domain in a date window: count, total points and comments, and the top stories.

Macro & calorie targets / nutrition by fitness goal: calculate daily intake. Returns macro and calorie targets plus a meal-timing strategy based on goal, body weight, and activity level. Fitness-info for fitness and nutrition agents, not medical advice.

Compare two English words side by side: parts of speech, sense counts, lead definitions and what they share.

Certificates in Certificate Transparency logs for a domain: recent certs, issuers, subdomains seen (Cert Spotter).

Batch dependency vulnerability check — check ordered exact package versions in OSV with deduplicated CVE enrichment, explicit completeness, and CISA KEV known-exploited signals.

Clinical trial search — find ClinicalTrials.gov studies by free text, condition, intervention, sponsor, recruitment status and phase, and get each study's NCT id, titles, status, phases, conditions, interventions, sponsor, start and completion dates, enrollment and whether results are posted. Use for drug development, medical research and patient-recruitment questions.

Cosmetic procedure cost intelligence for healthcare and consumer-health agents. Returns ASPS benchmarks, a total cost breakdown, and financing options for any elective procedure.

Four Pillars (BaZi) chart for a date and optional time: stems, branches, animals, five-element counts, day master.

NIH-funded project search — find grants by words in the title, abstract or research terms, filtered by fiscal year, NIH institute, organisation, state, activity code, SBIR/STTR mechanism or award size, with the fiscal-year award amount, investigators, organisation and dates for each. Use to see who NIH funds on a topic, how much, and which small companies.