Getting an API key
API Key tab
From there, you may click on Add to create a new key and give a name to your project. Each Etherscan account is limited to creating 3 keys at any one time.
Creating an API key
To change your project name associated with an API Key, click on Edit to specify a new App Name, and save the changes.
Edit Project details
If you would like to delete an API Key or suspect your key has been compromised, you may click on Remove to delete that key and generate a new one.
Delete API key