Check DNS propagation of a record across 8 public resolvers worldwide (Google, Cloudflare, Quad9, OpenDNS, AdGuard...): each answer and TTL and whether they all agree. Use after changing DNS.

Monthly nights spent in tourist accommodation (hotels, apartments, campsites) in any European country with year-on-year change; without a country, a ranking for the latest month. Official Eurostat data.

EVM developer utilities: keccak256 hash, function selector from a signature, EIP-55 checksum address and wei/gwei/ether conversion.

Safety recall campaigns for a vehicle by make, model and year in the US: affected component, summary, consequence, remedy, date, over-the-air fix and do-not-drive flags. Official NHTSA data.

List the URLs of a site's XML sitemap (found via robots.txt if needed, following sitemap indexes and .gz files) with last-modified dates, optionally filtered by text. Discover a site's pages for crawling or monitoring.

Generate a barcode as SVG (EAN-13, EAN-8, UPC-A, ISBN, ISSN, Code 128, Code 39, ITF, GS1-128...) for labels and products, computing the check digit when missing.

Distance between two coordinates (Vincenty geodesic on WGS84 plus great-circle), in km, miles and nautical miles, initial bearing and compass direction, midpoint and estimated time on foot, by car and by plane.

Crowd Check full scan ($1): is the crowd real? Profiles the top 300 real holders of a token on Base, Ethereum, Robinhood Chain or Solana - wallet age, real funder traced through routers, funder clusters, fresh wallets, snipers, launch bundles, dev and insider holdings, risk score 0-100, verdict organic/mixed/farmed. Free quote first at /v1/holders/quote, then ?quote=<id>; returns a job, call again with the same quote for the result.

Impermanent loss calculator for Uniswap v2 (full range) and v3/v4 concentrated ranges: IL vs holding, out-of-range flag and final token mix.

Current price of up to 50 cryptocurrencies by ticker (BTC, ETH, SOL, XRP...) in USD or any ECB currency (EUR, GBP, JPY...). Covers the ~190 largest coins listed by alternative.me; currency conversion with ECB reference rates.

Extract keywords and keyphrases from a text without AI (RAKE algorithm scoring frequency and degree), in Spanish or English, plus most frequent words. For tagging, indexing and SEO.

Pricing calculator: from any two of cost, price, margin or markup it computes the rest, profit per unit and total, and the price with VAT. Avoids the classic margin vs markup confusion.

Validate a Legal Entity Identifier (LEI, ISO 17442): 20-character format and mod-97 check digits, split into LOU prefix and entity part. Computed locally; does not query GLEIF.

Sort Semantic Versioning 2.0 versions (pre-releases included), give highest and lowest, the bump type between two, and which satisfy an npm-style range (^1.2.0, ~1.2, >=1.0 <2.0, 1.x || 2.x) plus the best match.

Average price with taxes of petrol 95, diesel, heating oil and LPG in each EU country (European Commission Weekly Oil Bulletin), in EUR per litre, sorted cheapest first.

Turn a Spanish address, street, town or place into coordinates with the official CartoCiudad geocoder (IGN): normalized address, municipality and INE code, province, region, postcode and lat/lon.

corpusAI Cloud Pricing: Daily capacity stress scores for one GPU model.

Moon phase on a date: name, illuminated percentage, lunar age and the next new and full moon dates. Local astronomical calculation.

Follow the redirect chain of a URL (up to 10 hops): status code and time of each hop, final URL, domain changes and HTTPS-to-HTTP downgrades. Unmask short and affiliate links before visiting them.

Convert units of length, mass, volume, area, speed, temperature, data (KB vs KiB), energy, pressure, time and power, metric and imperial, with exact factors.