Submit queries to and retrieve results from the Bing Engine. Bing developer site
Submit queries to and retrieve results from the Bing Engine. Bing developer site
Shorten, Share and Track your links with the Bitly APIs.Bitly developer site
Keep, share and discover the best of the Web with Delicious APIs.Delicious developer site
Help classroom projects by integrating project information and donation functionality into your app.DonorsChoose.org developer site
Gain access to billions of data points about music, including artist info, taste profiles, playlists and more.EchoNest developer site
Bring Etsy's handmade marketplace and community into your apps.Etsy developer site
Test against Etsy's non-production data learn and explore (Sandbox API).Etsy Sandbox developer site
Build applications with facial recognition capability.Face.com developer site
Connect to the social network with the Graph API.Facebook developer site
Bring Fitbit health data into your apps, including user activities, sleep, heart, glucose and blood pressure information.Fitbit developer site
Checkin, explore your city and connect people and places (API v2).Foursquare developer site
Read and write access to the Freebase graph of people, places and things.Freebase developer site
Perform secure source code hosting and collaborative development with GitHub's v3 API.Github developer site
Perform secure source code hosting and collaborative development with GitHub's v2 API.Github developer site
Harness Google's cloud-based machine learning tools to analyze your data.Google Prediction developer site
Include high-quality web fonts in any web page.Google Web Fonts developer site
Keep up with your friends, share the places you go, and discover the extraordinary in the world around.Gowalla developer site
Put all those great ideas for Groupon improvements, extensions, and multiple-platform interfaces to work.Groupon API2 developer site
Fast, beautiful and fun way to share your life with friends through a series of pictures.Instagram developer site
Bring user profiles and professional networks to your apps.Linkedin developer site
Create apps and games within the MySpace platform. Monetize through advertising and virtual goods.MySpace developer site
Find breaking news, multimedia, reviews and opinion on Washington, business, sports, movies and more.NY Times developer site
Integrate PageSpeed performance analysis into your development workflow.PageSpeed developer site
Bring payments to apps, mobile and social with Adaptive Payments (Sandbox API).Paypal developer site
Access and manipulate agile project management data including projects, stories and tasks.Pivotal Tracker developer site
Easily and legally access and play music across web and mobile devices.Rdio developer site
Find the front page of the internet with Reddit APIs.Reddit developer site
Access Rhapsody technologies and content, including metadeta, search and music player.Rhapsody developer site
Interact with RubyGems.org to query and create gems, manage owners and more.Ruby Gems developer site
Explore the beta Salesforce REST API to integrate CRM.Salesforce developer site
Create applications for the social enterprise with Salesforce's collaboration platformSalesforce Chatter developer site
Shopping.com offers Publishers rich content via the Shopping.com's API.Shopping.com developer site
Easily create location-aware apps with SimpleGeo's API.SimpleGeo developer site
Access, host, upload, and comment on audio.SoundCloud developer site
Access, host, upload, and comment on audio (Sandbox API).SoundCloud sandbox developer site
Expore Spotify's music catalog, with search and look up for artists, tracks and albums.Spotify developer site
Create apps or scripts that can access Stack Exchange questions, answers, comments, badges and more.Stack Exchange developer site
Telephony platform that exposes SMS and voice capabilities.Twilio developer site
Access user data, geo, statuses and more with Twitter's REST API.Twitter developer site
Get forecast and weather data with complete geolocation services, global coverage and more.Weather Underground developer site
Access up-to-date weather information for your location, including condition codes.Yahoo Weather developer site
Search the Zappos catalog and much more.Zappos developer site
Launch the generic Apigee Console to interact with other APIs.
Is there an API you'd like to see here? Let us know!