Prinsmail

Prinsmail is a Nigerian SMS provider that is designed to serve a wide variety of users, from companies to private individuals. Developers can use an API to integrate the Prinsmail messaging gateway into their own applications or websites, enabling them to send single or multiple SMS and check their account balance.

Opera Link

Opera is a software company and provider of the Opera web browser, which runs on a variety of operating systems and a range of devices. The Opera Link API provides read and write access over an HTTP interface to users' Opera Link data storage. It is a REST API and all HTTP methods (GET, POST, PUT, DELETE) are supported. With this REST API, Bookmarks, Notes, and Speed Dial data types can be exposed and manipulated.

Udemy

Udemy is an online learning platform. Students have access to more than 16,000 courses, including programing, languages, music, finance, yoga, photography, etc. Experts can also create courses to teach. The Udemy API allows developers build applications and integrations with Udemy using the Udemy functionalities. It is a REST API that has predictable, resource-oriented URLs and uses HTTP response codes to show errors.

GuideStar Search

GuideStar is an information service that reports on IRS-registered nonprofit organizations in the U.S. Their database provides information about each company's finances, impact, governance, reputation, programs, legitimacy, mission, etc. The GuideStar Search API enables searching of GuideStar's data sets about the nonprofits to find the information that is most relevant to user needs. Those results can then be used to get further data from GuideStar's other APIs.

Ideamart Pro

Ideamart is a platform that provides developers with a variety of services that they can integrate into their own applications. These services are delivered in the form of the Idea Pro APIs, which may be used to send SMS, charge payments, build apps with USSD menus, find user locations in real time, transfer funds between eZ Cash wallets, and manage subscriptions.

FBOpen

The FBOpen API is designed to help small businesses find opportunities to work with the U.S. government. Currently, the API allows users to search the contents of FedBizOpps and Grants.gov. Soon, the API will be able to access SBIR and State Department BIDS data as well. FBOpen is a project created by 18F, a startup within GSA.

Spritz

Spritz is a text integration and reading application. Spritz develops new technology for how text is consumed and read in applications and websites. The Spritz API allows developers to access and integrate the functionality of Spritz with other applications and to create new applications. Public documentation is not available; interested developers should sign up here: http://www.spritzinc.com/developers/.

Omlet

Omlet is a text and messaging application. Omlet lets users stay connected to their friends and contacts on the go. The Omlet API allows developers to access and integrate the functionality of Omlet with other applications. Some example API methods include retrieving messages, sending messages, and managing contact information.