It's OAuth2, the client credentials flow.
You've got to send your Cisco API Console client credentials in a POST to https://cloudsso.cisco.com/as/token.oauth2 with the following payload:
{"client_id": <client_id>, "client_secret": <secrtet>, "grant_type": "client_credentials"}
You'll receive a response like:
{"access_token": "i9BIwm6tTKXkAhmCtaVzbSK2J", "token_type": "Bearer'", "expires_in": 3599}
You only have to add the token to your requests headers:
{"Authorization": "Bearer i9BIwm6tTKXkAhmCtaVzbSK2J"}