Developer Guides Consistent, easy-to-follow guides walk you through each API. Sample Code View sample code in PHP, JAVA, C# and other supported protocols and languages. Upload Your List Test our APIs and discover the possibilities by uploading a test list. Tools & applications Extend functionality and get deeper insights with plugins, mashups, and testing tools. DataTumbler Our free desktop tool is ideal for do-it-yourself data processing and instant results. Quick lookups Seeing is believing. Use our quick lookups to see how each API transforms your data.