The API Explorer tool exists for both our staging and production environments. You will need to use the applicable explorer link as the integrator keys and credentials you have been provided are specific to each environment.
Note: the production link points to our sandbox company, which is a test company in our production environment. While all companies have a unique API Explorer link (replace 'sandbox' with the company's unique profile name) they all contain the exact same information. You will need to use the company specific link if you intend to use the 'Try it out' features of the API Explorer as company-specific credentials are required.