List of data APIs that require **no server-side auth or private credentials**, and are thus good for small browser-only JS projects.

* [3taps](http://3taps.com/developers-overview.php) (information)
* [Adobe Creative SDK](https://creativesdk.adobe.com/docs/web/#/index.html) (image editing)
* [App.net](http://developers.app.net/docs/resources/)
* [Bing Maps](http://msdn.microsoft.com/en-us/library/dd877180.aspx)
* [Echo Nest](http://developer.echonest.com/) (music)
* [Etsy](http://www.etsy.com/developers/documentation/getting_started/jsonp) (shopping)
* [Facebook Graph API](https://developers.facebook.com/docs/reference/api/) ([JS SDK](https://developers.facebook.com/docs/reference/javascript/) allows auth via client-side)
* [Flickr](http://www.flickr.com/services/api/) (images)
* [Foursquare](https://developer.foursquare.com) (location)
* [Gilt](https://dev.gilt.com/page/gilt-public-apis) (shopping)
* [GitHub](http://developer.github.com/) (code)
* Google
  - [Google Knowledge Graph](https://developers.google.com/knowledge-graph/) (information)
  - [Google Maps](https://developers.google.com/maps/documentation/javascript/tutorial)
  - [Google Plus](https://developers.google.com/+/api/) (people)
  - [Youtube](https://developers.google.com/youtube/)
* [Gravatar](http://en.gravatar.com/site/implement/)
* [Grooveshark](http://developers.grooveshark.com/) (music)
* [HERE](http://developer.here.net/) (maps)
* [Instagram](http://instagram.com/developer/) (images)
* [Lob](https://www.lob.com/docs#verify) (mailing address verification)
* [Mapbox](https://www.mapbox.com/developers/) (maps)
* Mapzen [plugins](https://mapzen.com/projects/) and [data](https://mapzen.com/data/) (maps)
* [Markit On Demand](http://dev.markitondemand.com/MODApis/) (stocks)
* [Meetup](http://www.meetup.com/meetup_api/)
* [Metropolitan Museum of Art](http://scrapi.org/)
* [OpenStreetMap](http://wiki.openstreetmap.org/wiki/Develop) (maps)
* [OpenTok](http://www.tokbox.com/opentok/api/features) (videochat)
* [Pearson](http://developer.pearson.com/apis) (publications)
* [Reddit](http://www.reddit.com/dev/api)
* [SoundCloud](http://developers.soundcloud.com/) (music/audio)
* [SpaceAPI](http://spaceapi.net/) (hackerspace directory)
* [Spotify](https://developer.spotify.com/) (music)
* [Stripe](https://stripe.com/docs/stripe.js) (payment)
* [Transitland](https://transit.land/how-it-works/) (public transit)
* [Tumblr](http://www.tumblr.com/docs/en/api/v2)
* [Twilio Client](http://www.twilio.com/client) (audio/video)
* [Vimeo Simple API](http://developer.vimeo.com/apis/simple) (video)
* Wikipedia, via [DBpedia](http://dbpedia.org/About) or [MediaWiki](http://www.mediawiki.org/wiki/API) (information)
* [Wolfram Alpha](http://products.wolframalpha.com/api/) (information, math, etc.)

## See also

### More lists

* [Public APIs](https://github.com/toddmotto/public-apis)
* [popular APIs on ProgrammableWeb](http://www.programmableweb.com/apis/directory/1?sort=mashups)
* [APIs.io](http://apis.io)
* [Public APIs](https://github.com/toddmotto/public-apis)

### [Backends as a service](https://en.wikipedia.org/wiki/Backend_as_a_service)

* [Apigee App Services](http://apigee.com/docs/app_services)
* [Firebase](https://firebase.google.com/)
* [Webshell](http://webshell.io)

### Client-side auth

* [hello.js](http://adodson.com/hello.js/)
* [OAuth.io](https://oauth.io)

### Other

* [jsonp.jit.su](https://jsonp.nodejitsu.com)
* [Kimono](https://www.kimonolabs.com/) – "Turn websites into structured APIs from your browser in seconds"