This API no longer available.
500friends is a social loyalty program for retailers, companies, and brands to use to engage and reward their customers. 500friends offers social marketing features, such as badges, currency, and other rewards for their customers.
The 500friends API allows developers to access and integrate the functionality and features of 500friends with other applications. Public documentation is not available; API documentation and access comes with accounts.
With Charts Factory API, you can create a chart image with a single API call and embed it anywhere. Send charts in email and other platforms. You can create Bar, Horizontal Bar, Line, Area, Doughnut...