The Fibre Gateway uses the industry standard OAuth 2.0 authorization protocol with Client Credentials flow for server-to-server authentication. For more information about OAuth 2.0, see

All requests to the Fibre Gateway must be authenticated and include a valid access token. This token must be retrieved from the token endpoint by specifying your client credentials: client id and client secret.

The access tokens created are JWT (JSON Web Token) with a TTL expiry of 1 hour. Where possible, tokens should be re-used in request flows and not created for each request.

See Authentication API for more details.