Explore APIs

Sentence BLEU (1-4 gram, brevity penalty, optional smoothing) and ROUGE-1, ROUGE-2, ROUGE-L F1 for text against references.

Extract the h1-h6 heading outline from supplied HTML and flag missing or multiple h1, skipped levels and empty headings.

Format an amount as money for an ISO 4217 currency code in a locale; reports minor-unit digits; unknown codes rejected.

Link a NAICS industry to its top SOC occupations, or a SOC occupation to its top industries, from the BLS employment matrix.

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

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

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

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.

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

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

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.

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

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).

Twitter (X) video & image downloader — pass a public tweet / X post URL, get direct CDN media links: .mp4 video URLs with thumbnails plus every image in the post, ready to stream, embed, re-host, or download. No scraping or browser automation.

Rates for up to 10 currencies against one base at once, with each one's 30-day change, strongest and weakest first.

Official UK bank holidays for England and Wales, Scotland or Northern Ireland in a given year, with weekdays, from GOV.UK.

Product recalls (US): is a product, brand, food, drug, medical device or vehicle (make, model, year) under an active FDA, NHTSA or CPSC recall? Severity on one scale, hazard, remedy and lot codes. RecallScout

Screen a CelesTrak group for low-perigee objects (default under 250 km). A heuristic flag, not a re-entry prediction.

Axial stress, strain and elongation from load, area, E and length; thermal strain/stress; factor of safety vs yield.

Can Googlebot, Bingbot and AI crawlers (GPTBot, ClaudeBot, CCBot) fetch this page? robots.txt, sitemap and noindex checked.

Look up which regions use a country calling code (+44, +1) or a region's code, dialing prefixes and national prefix.

One query across Wikipedia, Hacker News, Crossref papers and Wikidata: top hits from each, source-labelled and interleaved.

Which discovery files does a site publish? Checks openapi.json, .well-known/x402, agent-card.json, mcp.json and ai-plugin.json.

Bible book facts: chapters, testament, order and abbreviations for one of the 66 books, or the full table (1189 chapters).

Dates for every N business days, or the last or Nth business day of each month, skipping weekends and your holiday list.

USGS earthquakes in a date window (up to 31 days) above a minimum magnitude: time, magnitude, place, lat/lon, depth.

Optimal Tower of Hanoi move list for up to 10 disks between pegs A, B and C, and the minimum move count 2^n - 1.