+Service Management and Exposure
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+An initial implementation of the CAPIF Core service. It implements the following CAPIF APIs:
+
+- API Provider Management
+- Publish Service
+- Discover Service
+- API Invoker Management
+- Security
+- Events
+
+Implementation:
+
+- Implemented in Go
+- Repo: *nonrtric/plt/sme*
+- Documentation at the :doc:`Service Management & Exposure (SME) documentation site <sme:index>`.
+
+Authentication Support
+~~~~~~~~~~~~~~~~~~~~~~
+
+The auth-token-fetch provides support for authentication.
+It is intended to be used as a sidecar and does the authentication procedure, gets and saves the access token
+in the local file system. This includes refresh of the token before it expires.
+This means that the service only needs to read the token from a file.
+
+It is tested using Keycloak as authentication provider.
+
+.. image:: ./AuthSupport.png
+ :width: 500pt
+
+So, a service just needs to read the token file and for instance insert it in the authorization header when using HTTP.
+The file needs to be re-read if it has been updated.
+
+The auth-token-fetch is configured by the following environment variables.