Get your API key
To get your API key, you need to be subscribed to OxygenIT.
You need a ScaleDynamics organization​
If you don't have one, you can signup an account and create an new organization (sign up here)
Or start a one month free trial (trial here), no credit card required.
Ask for subscription​
Currently you have to contact 'sales@scaledynamics' so they can enabled OxygenIT in your subscription.
Get the API key​
When OxygenIT subscription is enabled, in the subscription tab, you can get the API-key of OxygenIT by clicking on 'show api-key token' button.

Using the API key​
After getting your key, as indicated in the Carbon calculator API documentation,
you need to add in the header
of each API request a field token
with the api key token.
For example:
curl -H "token: YourApiKeyToken" \
...