Sina Weibo

Sina Weibo is a Chinese microblogging website. The Sina Weibo API provides developers with programmatic access to the service. Via the API, users can read and write to all aspects of the service including microblogging, comments, users, topics, relations and much more. The API uses RESTful calls and responses are formatted in JSON. The site and documentation are in Chinese.
Sina Weibo

Mopapp

Mopapp tracks and analyzes a user's sales and downloads of their mobile apps, then generates reports on the data. Mopapp automatically integrates with iTunes App Store, Android Market, WP7 Markerplace, BlackBerry App World, Amazon Appstore, GetJar, Handango, and MobiHand. The API can be used to programmatically export sales, or to insert new ones to track from within any third party source. Additional functionality includes deleting sales, and retrieving the sales/downloads for all or for specific stores/platforms/applications/countries. It uses HTTP calls and responses are formatted in XML and JSON.
Mopapp

DbApi

DbApi allows users to access their SQL databases via a web interface. With the API users can manage their DB queries and credentials and then execute them. Functionality includes storing query templates and DB access information; execute queries using variables; sharing queries with collaborators and more. The API uses HTTP calls and responses can be formatted in JSON and CSV.
DbApi

Socializando Llevame

Socializando is a Mexican software company specializing in creating marketing strategies on social networks and mobile devices. Their Llevame API allows users to connect with each other by giving a route between any two locations in Mexico City. Given a start point and an end, the API creates the simplest route. It uses HTTP calls and responses are formatted in JSON.
Socializando Llevame

MaGdev BankSearch

The BankSearch API lets users search for bank information such as ID-codes, names or cities. Search for bank information like ID-codes, names or city. Currently only German banks are supported. This information can be used for auto-complete functionality in web forms for example. The database search API uses the Zend Lucene implementation as backend. This can also search for example, all banks in a city or zip code. The API is freely available for everyone. It uses HTTP calls and responses are formatted in JSON.
MaGdev BankSearch

SuperFish

Superfish is a visual search technology that lets users use images instead of keywords as search queries for products. When a user inputs an image query, the visual search software extracts visual features and searches through an index of images to find those that are most similar to the query. Superfish offers developers the chance to integrate visual search functionality on their applications or web sites through the Superfish API. The API lets developers create a customized visual search experience for their users. Clients can send an image URL or the image itself and Superfish will return a set of visually similar product offers in JSON format. Developers should contact Superfish for more details and technical documentation.
SuperFish

Klarna

Klarna is a online payment service that allows businesses to accept online payments without their customers having to use a credit card. Klarna can also be used by individuals to pay for goods online without using a credit card. The Klarna API allows developers to integrate Klarna's functionality with other applications. Some example API methods include emailing invoices, crediting invoices, calculating costs, and managing inventories.
Klarna

DNS Tools

DNS Tools is a simple API that lets users resolve DNS addresses into IP addresses as well as the other way around. It also can return a client's IP address. The API uses HTTP calls and responses are formatted in JSON. Client libraries are also available to developers.
DNS Tools

CloudFlare Hosting Provider

CloudFlare is a content delivery network that both increases website performance through faster load times and provides security. It provides developers with a Hosting Provider API that allows hosting providers to enable CloudFlare for their clients. The API lets users register their users with the CloudFlare system and also register users' domains to be hosted by CloudFlare system. The API uses HTTP calls and responses are formatted in JSON.
CloudFlare Hosting Provider

AuthDog

AuthDog is an API that lets users quickly create authentication for their apps. It can be used to implement signup with built-in email validation, login and forgot password functionality with built-in email recovery. The Authdog API can be consumed via Mashape. It uses RESTful requests and responses are formatted in JSON.
AuthDog