Apart from the free trial mentioned by sqrt17 (orange "Get started free" button at http://bluemix.com/ http://bluemix.com/), you can find open source (Apache 2.

Apart from the free trial mentioned by sqrt17 (orange "Get started free" button at http://bluemix.com/ http://bluemix.com/), you can find open source (Apache 2.0) SDKs for different languages. The one I used for NodeJS: https://github.com/watson-developer-cloud/node-sdk https://github.com/watson-developer-cloud/node-sdk It was useful to read the source code to figure out some aspects I didn't find in the documentation.