You can use Sandbox to test our APIs against your application in both Preview and Production. In order to test, you will need to use the Authorize Now button to input your credentials. More on testing can be viewed in our written documentation.
NOTE: For Preview, all users are given access to practiceID 195900 for all Ambulatory only testing and practiceID 1128700 for all Hospital/Health System testing. Users may also have their own practiceID they can test against.