List of data APIs that require no server-side auth or private credentials, and are thus good for small browser-only JS projects.
- 3taps
- App.net
- Aviary
- Bing Maps
- Echo Nest
- Etsy
- Facebook Graph API (JS SDK allows auth via client-side)
- Flickr
- Foursquare
- Freebase
- Gilt
- Github
- Gravatar
- Grooveshark
- HERE (Nokia maps)
- Hunch
- Lob (mailing address verification)
- Meetup
- Metropolitan Museum of Art
- OpenTok
- Pearson
- SoundCloud
- SpaceAPI (hackerspace directory)
- Spotify
- Stripe
- Tumblr
- Twilio Client
- Twitter REST API
- Vimeo Simple API
- Wikipedia (via DBpedia or MediaWiki)
- Wolfram Alpha
- jsonp.jit.su
- Kimono – "Turn websites into structured APIs from your browser in seconds"