Ponderable Hydrometer

Find public-transport GTFS / GTFS-RT / GBFS feeds worldwide from the Mobility Database — by country, city or provider, with download URLs, license and bounding box.

NASA open data — Astronomy Picture of the Day (image/video, explanation) and near-Earth asteroids (size, hazard, approach distance & speed). Free API key (BYO).

Scrape Nintendo eShop / Switch game data — titles, prices, discounts, genres, players, release dates — via Nintendo's public European store search. Search by keyword or look up by nsuid. No proxies, no login.

Get food & nutrition data from Open Food Facts — barcode, keyword or category. Brand, Nutri-Score, NOVA, ingredients, per-100g nutrients. Free, keyless, no proxies.

Search books from Open Library — title, authors, year, editions, ratings, subjects, ISBN & covers. Look up editions by ISBN. Free keyless API. For catalogs, apps & datasets.

Extract local businesses & POIs from OpenStreetMap — name, address, phone, website, hours, coords — by area or bbox. Free Overpass API, no key. A cheap Maps alternative.

Package intelligence across npm, PyPI & crates.io — version, license, repo, dependencies & monthly downloads. Search or look up by name. Free keyless APIs.

Look up chemical compounds from PubChem by name or CID — formula, weight, SMILES, InChI, IUPAC name, logP, TPSA & synonyms. Free keyless API. For chem, pharma & research.

Official Romanian company data by CUI: name, address, phone, trade-register number, CAEN code, VAT status, e-Factura, legal form and active/inactive standing — straight from ANAF. Bulk lookups, keyless. For KYC, supplier verification and enrichment.

Find cheaper generic equivalents of any Romanian medicine — same active substance (DCI), sorted by price, with producer, wholesale and retail prices. Official ANMDMR + CANAMED data.

Get SEC EDGAR filings for any US public company — every form: 10-K, 10-Q, 8-K, Form 4 insider trades, 13F holdings, DEF 14A, S-1 — by ticker or CIK, or run full-text search across all filings. Built on the SEC's official free API. No key, no proxies. Comprehensive and reliable.

Academic papers & authors from Semantic Scholar — citations, influence, venue, DOI/arXiv, open-access PDF & author metrics. Bulk search & batch lookup. No key.

Sports data from TheSportsDB — search teams and players, list league teams, and get fixtures and results across football, basketball, NFL and more. Free test key or bring your own.

Search Stack Overflow & any Stack Exchange site for questions — and their answers — by keyword, tags, votes. Free API, optional key for higher quota. For research & datasets.

Scrape Steam game metadata, prices, genres, Metacritic scores and player reviews via Valve's public store APIs. Look up by app id or store URL, or search by keyword. No proxies, no login.

Search EU public procurement notices from TED (480k+) by keyword — buyer, country, CPV, value, deadline, link. Official free EU API, newest first. No key.

Transport for London data — line status, live arrivals by line or stop, stop search and line stops across tube, bus, DLR, Overground and more. Free, no key needed.

Screen stocks, crypto & forex from TradingView — price, % change, volume, market cap, P/E, sector and any column. Sort and filter. No API key. For traders & apps.

Public-transport data from Transitland — operators, routes, stops and scheduled + real-time departures across thousands of cities worldwide. Bring your own free key.

Scrape TV show data via the free TVMaze API — search or look up shows, get genre, network, rating, IMDb id, full episodes and cast. No key, no proxies.

Scrape UK legislation from legislation.gov.uk — Acts of Parliament and Statutory Instruments, full text structured by section, with metadata. Free, no key.

Food & nutrition data from USDA FoodData Central — branded & generic foods, brand, ingredients, serving size & full nutrient profiles. Free API key (BYO).

US river & stream conditions from USGS Water Services — streamflow, gage height, water temperature and more, current or historical. Free keyless API. For anglers, hydrology & apps.

Live public-transport departures for Vienna (Wiener Linien) — per-line countdown, planned & real times, direction and platform. Search stops by name. Free, no key.