NASA ADS
NASA Astrophysics Data System
Science & Math · OAuth · HTTPS
Search the API archive · Page 43
Page 43 of 215
Ordered by reported HTTPS, CORS support, no-auth access, then changed/observed facts. Access signals are not a popularity or quality score.
NASA InSight
Mars weather data from InSight lander
Science & Math · API key · HTTPS
National Park Service, US
Data from the US National Park Service
Government · API key · HTTPS
Nomics
Historical and realtime cryptocurrency prices and market data
Cryptocurrency · API key · HTTPS
NoPhishy
Check links to see if they're known phishing attempts
Anti-Malware · API key · HTTPS
NORTH7 Agent
Trading signals, market analysis and geopolitical intelligence
Finance · API key · HTTPS
ObjectCut
Image Background removal
Photography · API key · HTTPS
Oikolab
70+ years of global, hourly historical and forecast weather data from NOAA and ECMWF
Weather · API key · HTTPS
Open Charge Map
Global public registry of electric vehicle charging locations
Transportation · API key · HTTPS
OpenCage
Forward and reverse geocoding using open data
Geocoding · API key · HTTPS
OpenFIGI
Equity, index, futures, options symbology from Bloomberg LP
Finance · API key · HTTPS
OpenFoot API
Football fixtures, results, standings, lineups, live events and shot-level xG across 75 competitions
Sports & Fitness · API key · HTTPS
OpenQR
Generate QR codes and manage dynamic (editable) QR codes with scan analytics
Development · API key · HTTPS
OrbitalWiki
Catalog of 16,000+ satellites merging CelesTrak, GCAT, Wikidata; free tier included
Science & Math · API key · HTTPS
Orizn Visa
Visa requirements for 199 countries, 39K+ passport-destination pairs in 15 languages
Transportation · API key · HTTPS
OwlBot
Definitions with example sentence and photo if available
Dictionaries · API key · HTTPS
PageCDN
Public API for javascript, css and font libraries on PageCDN
Development · API key · HTTPS
PDFFleet
HTML and URL to PDF API with templates and a free tier
Documents & Productivity · API key · HTTPS
Peak
Cloudflare Turnstile and 5-second challenge solving, pay per successful solve, 1,000 free solves
Development · API key · HTTPS
Pexafy
Semantic image search across 9+ free stock photo sources with a unified JSON schema
Photography · API key · HTTPS
Pexels
Free Stock Photos and Videos
Photography · API key · HTTPS
Phone Validation
Validate phone numbers globally
Phone · API key · HTTPS
Pixela
API for recording and tracking habits or effort, routines
Tracking · API key · HTTPS
ProxyKingdom
Rotating Proxy API that produces a working proxy on every request
Development · API key · HTTPS