Deterministic Legal Entity Identifier check for regulatory reporting pipelines (EMIR, MiFID II require a valid LEI per counterparty): structure regex and ISO 7064 mod 97-10 checksum over the 20-char code. Query: ?lei=HWUPKR0MPOU8FGXBT394. Returns valid, lou_prefix, entity_part and a failure reason. Filters typos before hitting the GLEIF registry (see /v1/global/lei for the live record). Pure offline, 1y cache.

Latest METAR observation, decoded, for any ICAO airport worldwide (NOAA AviationWeather.gov): wind direction/speed/gust (kt), temperature/dewpoint (C), visibility, QNH altimeter (hPa), flight category (VFR/MVFR/IFR/LIFR) plus the raw METAR string. Query: ?ids=KJFK,LFPG (1-10 comma-separated ICAO codes). Observations refresh every 30-60 min; 5 min cache.

Irish company registry search on CRO open data (opendata.cro.ie, daily snapshot of the Companies Registration Office register). Query: ?q=ryanair (full-text name search) or ?q=249885 (company number), optional limit (1-10, default 3). Returns company number, name, status, type, registration and dissolution dates, registered address, NACE code, last annual return and accounts dates. Company data only. CC-BY 4.0. 24h cache.

Live EORI (Economic Operators Registration and Identification) validation via the European Commission EOS/DDS2 service -- the number every business needs to clear customs in the EU. Query: ?eori=FR38347481400100 (2-letter country + up to 15 alphanumerics). Returns valid true/false plus registered name and address when the operator consented to publication. SOAP upstream, clean JSON out; 24h cache.

Deterministic ISIN check before routing an order or paying a market-data API: structure regex (2-letter country or XS/EU, 9-char NSIN, check digit) and the Luhn checksum over the base-36 expansion. Query: ?isin=US0378331005. Returns valid, country_code, nsin, check_digit and is_international. A corrupted ISIN means a rejected order or the wrong instrument. Pure offline computation, 1y cache.

Latest observed 15-min records from RTE's eCO2mix national real-time dataset (ODRE portal, Licence Ouverte 2.0). Per record: UTC timestamp, consumption vs D/D-1 forecasts (MW), production by source (nuclear, wind, solar, hydro, gas, coal, bioenergy, storage), grid CO2 intensity (g/kWh) and commercial exchanges per border. Query: ?rows=1-12 (default 4 = last hour). 15-min cache.

Near-real-time Great Britain national electricity demand outturn from the Elexon Insights (BMRS) open API: 5-minute MW readings sorted oldest to newest (default: last 24h = 288 points), plus a 'latest' field with the most recent value. ?last=N (1-500) sets how many recent points to return, e.g. ?last=12 = last hour. Upstream updates every ~5 min; served with a 5-min cache.

Offline validation of intermodal container numbers per ISO 6346: owner code, equipment category (U/J/Z), serial and check-digit verification (mod-11 with power-of-2 weights). Catches transcription errors before a booking or B/L is filed. Query: ?container=CSQU3054383. Returns valid flag, parsed parts and the computed check digit. Deterministic, cached 1 year.

Carbon intensity of Great Britain's electricity grid from the official NESO Carbon Intensity API (CC BY 4.0), in half-hour periods with a low/moderate/high index. No params -> current national half-hour; ?horizon=fw24h|fw48h adds the forecast; ?region=1..17 (13=London) switches to a DNO region and includes the generation mix per fuel. 30-min upstream cadence, 30-min cache.

Official Slovak business registry (RPO) search via api.statistics.sk (Statistical Office of the SR). Query: ?q=31333532 (8-digit ICO) or ?q=eset (name; historic names also match, current-name hits rank first). Optional active_only=true, limit 1-5. Returns per entity: ICO, current name, legal form, address, source register, establishment/termination dates. Personal data of individual entrepreneurs is stripped (GDPR). 24h cache.

Current wall-clock time for any IANA timezone, resolved live by timeapi.io (IANA tz database, includes DST rules). Query: ?tz=Europe/Paris (or America/New_York, Asia/Tokyo...). Returns ISO datetime, date, time, day_of_week and dst_active flag. Served with a 60s cache.

Latest earthquakes from the USGS real-time catalog (public domain, updated within minutes). Query: ?minmagnitude=4.5&limit=20; optional starttime/endtime (ISO 8601), geographic filter latitude+longitude+maxradiuskm, alertlevel=green|yellow|orange|red (PAGER). Returns a normalized list: magnitude, place, UTC time, coordinates, depth, tsunami flag, significance. 5 min cache.

Hourly EPEX Spot day-ahead electricity prices in EUR/MWh from the aWATTar market data API, normalized to ISO 8601 UTC with min/max/avg summary. No params -> rolling ~24h day-ahead window; ?zone=de|at selects the bidding zone, ?start=&end= (ISO 8601 or epoch) select history. Day-ahead data updates once daily; served with a 1h cache.

Official Czech business register lookup via ARES (Ministry of Finance, ares.gov.cz). Query: ?q=skoda or ?q=00177041 (company name or 8-digit ICO), optional limit (1-10). Returns ICO, DIC (CZ VAT number, cross-checkable in EU VIES), legal form, registered address, NACE activity codes, per-register status (commercial, trade, VAT) and creation date. Company data only, personal data stripped (GDPR). 24h cache.

Official Bank of Canada Valet observations, normalized JSON. Query: ?series=FXUSDCAD,FXEURCAD&recent=5 (1-10 comma-separated codes; FX pairs like FXUSDCAD/FXEURCAD/FXGBPCAD, overnight target rate V39079, prime rate V80691311). recent=N returns the last N daily observations (default 1, max 60). Primary-source CAD reference, published each business day; 6h cache.

Instant pre-validation of French company numbers before invoicing or costly Sirene API calls. Auto-detects SIREN (9 digits) vs SIRET (14 digits), applies the INSEE Luhn rule and the documented La Poste exception (356000000*: digit sum mod 5). Query: ?number=44306184100047 (spaces/dots/dashes tolerated). Returns valid, type, siren, nic and the rule applied. Pure offline computation, 1y cache.

Euro Short-Term Rate (ESTR), the official euro overnight benchmark, direct from the ECB Data Portal (dataset EST, published each TARGET2 business day ~08:00 CET). Query: ?last_n=5 (1-30 fixings, default 1) &include_volume=true to add the underlying transaction volume in EUR millions. Returns date-sorted observations plus the latest fixing; 1h cache.

Polish company due diligence in one call, combining Biala Lista VAT (Ministry of Finance) and the KRS court registry. Query: ?nip=7740001454 or ?krs=0000028860 (digits only). Returns VAT status, name, REGON, KRS, address, government-verified bank accounts (anti-fraud), plus legal form, capital, registration date and insolvency signals (KRS dzial 6: bankruptcy, restructuring, liquidation). Personal data stripped (GDPR). 24h cache.

Solana mint risk preflight via x402: holder-concentration proxy, creator context when covered, coverage and freshness. Use for one mint before launch-dossier spend. Not a rug verdict, price feed, or Birdeye/Nansen substitute. Evidence only — beta.

APEX Runner: Market Tick Signal