The Yahoo Developer Network offers APIs and tools to make it easy for developers to build, advertise, enhance applications and earn money with Yahoo.



Open source distributed data store for fast, scalable, real-time exploratory analytics on large datasets.

Flurry Analytics

Get the industry's leading mobile app analytics tool - for free.


A modular collection of JavaScript libraries for internationalization that are focused on formatting numbers, dates, and strings.


Yahoo APIs use OAuth protocol for authentication and accessing protected data.

Tumblr In-App Sharing

Easiest way for your users to share content to Tumblr, measure activity, and drive user acquisition on Tumblr.


The YQL platform provides a single endpoint service that enables developers to query, filter, combine, execute and store data across Yahoo and beyond.




Extend your reach by leveraging contacts and relationships by leveraging your users Yahoo address book safely and securely.


Build fun, creative, and gorgeous experiences around photos using Flickr API.

Flurry Pulse

Send your app data to partners of your choice with one SDK.


Monetize your website across desktop, tablet and mobile, utilizing search ads and algorithmic web results with Yahoo Partner Ads (YPA).

Social Directory

Social Directory API provides access to users' Yahoo profile and relationships information.


Invent new ways to use Tumblr.


Get up-to-date weather information for your location including 5-day forecast, wind, atmosphere, astronomy conditions, and more.


Commerce Central

A cloud platform for ecommerce. Build ecommerce apps and integrate with many platforms.

Yahoo App Publishing

Earn revenue with native and video ads from Yahoo, Flurry and BrightRoll advertisers.


BrightRoll DSP API

Programmatically monitor, create, and manage advertising campaigns with the BrightRoll DSP API.

Gemini API

Manage complex Gemini accounts and campaigns more efficiently with Gemini API.

Yahoo App Marketing

Reach your target audience with the Gemini native and video marketplace.