1. Login to your sandbox account. Don't have one? Create one now.
2. Once you are logged in, go to "Settings" -> "My Account" at the top right of your screen.
3. Click on the "API" tab and click on "Generate Access Key".
4. Use your favorite API testing tool and try it out now. Example:
$ curl -H "Authorization: UserToken <Your Access Key>" https://api-sandbox.cloudwords.com/1/user.json
5. Ready for more? Check out the complete documentation and download SDKs.