17NAS
Free IP geolocation API with IPv4/IPv6 detection, ASN and country info, no auth required
Geocoding · No auth · HTTPS
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Ordered by reported HTTPS, CORS support, no-auth access, then changed/observed facts. Access signals are not a popularity or quality score.
BoltPatternHQ
Vehicle wheel fitment, bolt pattern (PCD), offset, and center bore specifications
Vehicle · No auth · HTTPS
CoinXview
Real-time crypto prices aggregated from 22 exchanges, OHLC, market stats, Fear & Greed
Cryptocurrency · No auth · HTTPS
ConsumerSun Recalls
US product, food, drug, device and vehicle recalls from CPSC, FDA and NHTSA
Open Data · No auth · HTTPS
FertilityClinics
US fertility and IVF clinics built from CDC public data
Health · No auth · HTTPS
HaulierScope
Great Britain goods vehicle and PSV operator licences, change history and public inquiries
Transportation · No auth · HTTPS
Hourora
Current time, DST-aware conversion, all IANA zones with clock changes, city and coordinate lookup
Development · No auth · HTTPS
Molicheck
Anonymous JSON lab/GMP calculators (molarity, dilution, ICH limits); no API key
Science & Math · No auth · HTTPS
QuiVad
Net short positions disclosed to 23 market regulators, fund by fund, since 2010
Finance · No auth · HTTPS
SpotWave
Day-ahead electricity prices for 40+ European market zones, incl. taxes and VAT
Environment · No auth · HTTPS
SuperDuperBundle
Lowest listed PC game key prices across official and key stores, by name or Steam app ID
Games & Comics · No auth · HTTPS
Timezones
Time now, conversions and DST changes for every IANA time zone, no key needed
Development · No auth · HTTPS
Toolalize
Unit and live currency conversion with NIST SI factors, no key needed
Science & Math · No auth · HTTPS
VantaSpec
UK PC hardware prices, price history and specs across UK retailers
Shopping · No auth · HTTPS
10ML Fragrance Index
Perfume knowledge: notes, accords, families, similar scents, houses, guides. By 10ML
Open Data · No auth · HTTPS
Calendrier Tempo
French EDF Tempo tariff: today's and tomorrow's colour, kWh prices and 15-day colour forecasts
Environment · No auth · HTTPS
CardZ Marketcap
Daily PSA 10 market cap, prices and population for Pokémon and One Piece cards
Games & Comics · No auth · HTTPS
Enterno
HTTP headers, DNS, SSL, WHOIS and redirect checks as plain text, JSON or CSV
Development · No auth · HTTPS
Kurtaxe
German tourist tax (Kurtaxe) rates by municipality, each quoted from the municipal statute
Government · No auth · HTTPS
Namedesk
Domain name registration statistics by TLD, registry and registrar
Open Data · No auth · HTTPS
Peptide Library
Peptide research profiles, cited studies and regulatory status; vendor prices with a free key
Health · No auth · HTTPS
seodata
Keyword search volume, CPC and competition by country, no key needed
Development · No auth · HTTPS
Softoteca
Catalog of Brazilian software with the source of each data point and prices in BRL
Business · No auth · HTTPS
Touchline Wire
Premier League predicted starting lineups, tactics, injuries, and standings
Sports & Fitness · No auth · HTTPS