Search arXiv papers | Vextorium

Official US National Weather Service forecast for coordinates in the United States: next 7 days or hourly, temperature (F and C), wind, chance of rain, plus active weather alerts.

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.

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.

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.

Date facts (weekday, ISO week, quarter, day of year, leap year), exact difference between two dates in years, months, days, weeks and Mon-Fri working days, and adding or subtracting days, months or years (end-of-month safe).

Upcoming macro events with UTC date and time: US BLS releases (jobs report, CPI, PPI, JOLTS, wages...), Federal Reserve FOMC rate decisions and ECB monetary policy decisions. Filter by days ahead, text or high-impact only.

Year-on-year growth of euro area money supply M1, M2 and M3, month by month. A leading indicator of inflation and liquidity. Official ECB data.

Extractive summary without AI: picks the most representative sentences (term frequency and position scoring) and returns them in original order, with the reduction percentage. Deterministic and instant.

Daily history of the crypto Fear & Greed Index (0 extreme fear, 100 extreme greed): average, max, min, days in each zone and trend, with the series. Alternative.me data.

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.

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.

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.

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

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.

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.

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.

Spanish tax ID validation (DNI/NIF, NIE and company CIF) with check-digit verification. Computed locally; the ID is not stored.

TLS certificate of a domain: issuer, validity dates, days until expiry, names covered (SAN), whether it matches the domain and is trusted, TLS version and cipher. For uptime and security monitoring.

Sunrise, sunset, solar noon, day length and civil, nautical and astronomical twilight for coordinates and a date, in local time (zone detected from coordinates). Local astronomical calculation; handles polar night and midnight sun.

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

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.

Monthly US federal receipts, outlays and deficit (or surplus), plus the trailing 12-month deficit, from the Monthly Treasury Statement. US Treasury, public domain.

US labor market: unemployment rate, nonfarm payrolls with monthly job change, and average hourly earnings with annual growth. US Bureau of Labor Statistics, public domain.

Detect which email service a domain uses (Google Workspace, Microsoft 365, Zoho, Proton, OVH, IONOS...) from its MX and SPF records, plus corporate spam filters and other senders. For B2B sales and audits.

Population on 1 January of every European country (ranking) or the evolution of one with annual growth. Official Eurostat data.

Validate a securities ISIN (ISO 6166): format, check digit, issuing country and embedded CUSIP (US/CA, with its own check) or SEDOL (GB/IE). Computed locally; nothing stored.

Savings or investment plan with monthly contributions and compound interest: final value, total contributed, interest earned, value in today's money after inflation, yearly evolution and the monthly amount needed to reach a goal.

Search scholarly literature across all fields in OpenAlex (250M+ works): title, authors, institutions, year, journal, citation count, DOI and open-access link; by relevance, citations or date.

Food product facts by barcode (EAN/UPC) from Open Food Facts: name, brand, quantity, Nutri-Score, NOVA processing group, Eco-Score, nutrients per 100 g, allergens, additives, ingredients and countries.

Spanish postal code lookup (5 digits): municipality at the code's central point, province, region, INE code and coordinates. Official CartoCiudad (IGN) data, CC BY 4.0. Spain only.

Space weather now from NOAA SWPC: geomagnetic Kp index (recent hours and max), storm level (G0-G5), latest solar X-ray flares, solar wind speed and active alerts. Affects satellites, GPS and power grids.

Metadata of a publication by DOI (Crossref): title, authors, journal or publisher, year, type, citation count, references, license, link and an APA-formatted citation.

How ready a website is for AI agents: llms.txt, AI-crawler rules in robots.txt, sitemap, x402 payment discovery, OpenAPI, MCP manifest, security.txt, with a 0-100 score and concrete recommendations.

Crypto Fear & Greed Index (0-100) with classification. Data source: Alternative.me (attribution included in the response).

Website security headers audit: HTTPS, HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy and cookie flags, with a score.

API/URL health check: up or down, HTTP status, latency, and whether the endpoint is a valid x402 paid endpoint.

Profile a CSV (delimiter auto-detected): rows, columns, type of each column, nulls, unique values, min, max, mean, median, std, sum, top values, duplicate rows and a sample. Understand a dataset before using it.

Recalls enforced by the US FDA for drugs, food or medical devices, latest or by keyword: product, reason, risk class (I-III), company, country, distribution and status. openFDA data (CC0). Not medical advice.

Latest regulatory filings of a US listed company (8-K material events, 10-Q, 10-K, insider Form 4, 13D/G...) with date, 8-K items and direct document link. Optional filter by form type.

Natural disaster alerts in progress: worldwide M4.5+ earthquakes of the last 7 days (USGS, with PAGER alert level), tropical cyclones in the Atlantic and Eastern/Central Pacific (NOAA NHC) and flood and wildfire warnings in the United States (National Weather Service).

European Central Bank key rates (deposit facility, main refinancing, marginal lending) with the date they took effect, the history of deposit-rate changes in basis points, and the latest €STR overnight rate. Official ECB data.

Average interest rate on new mortgages (cost of borrowing for house purchase) and new consumer credit in a euro area country, with monthly evolution; without a country, a ranking. Official ECB MFI interest rate statistics.

Monthly seasonally adjusted unemployment rate (total, under 25 and 25-74) of any EU/EEA country, the EU or the euro area; with country=todos, a ranking of all countries. Official Eurostat data.

Loan or mortgage with French amortization (fixed installment): monthly payment, total paid, total interest, approximate APR (TAE) including fees, and a yearly or monthly amortization schedule.

Fetch an OpenAPI/Swagger spec (JSON or YAML) and summarize it for an agent: title, version, servers, authentication schemes and every endpoint with method, path, summary and required parameters.

Metadata and structure of a PDF (URL): pages, page size, title, author, creator, dates, version, encryption, form fields, attachments, bookmarks (table of contents) and whether it has extractable text or is a scan.

Real interest rate of about 150 economies from the World Bank (bank lending rate adjusted by the GDP deflator), latest year available, ranked. Annual data.

Latest disclosures of stakes above 5% filed with the SEC: Schedule 13D (activist investors) or 13G (passive), with subject company, filer, date and link, including amendments.