Hello,
To get the JSON-API key remotely, it is necessary to have the user name and password of the user.
To see how to get the API key, please see the following section in the documentation:
“APIs, APIs everywhere!” -> “Wallets JSON API” -> “Programmatic access to the Transactions API” -> “Getting a key”
The documentation showcases how to do this from the shell using curl. You can do this using your language of choice, as long as you can hold cookies between requests.
with regards