Before you start using our API, we advise you to try it in our Sandbox
environment. The sandbox environment was created explicitly for testing purposes. All purchases processed through the sandbox API are simulated.
To start testing API in Sandbox, you will need to sign up for an account here
(this account will not be associated with the one you have at http://www.namecheap.com
To enable access to Sandbox API, go to the Profile section, select Tools and choose the Namecheap API Access option for Business & Dev Tools.
You will get the API key almost immediately. Your API username is the same as your Sandbox account username.
NOTE: You should whitelist at least one IP before your API access begin to work. Please keep in mind that only IPv4 addresses can be used.
After you run some tests and find that you are satisfied with the work of our API, feel free to enable API in production environment for your Namecheap account.
If you have any questions, feel free to contact our Support Team.