[v1.x] Add subject and claims to AccessToken (#2690)

examples/servers/simple-auth/mcp_simple_auth/auth_server.py

@@ -123,6 +123,8 @@ def create_authorization_server(server_settings: AuthServerSettings, auth_settin
                 "iat": int(time.time()),
                 "token_type": "Bearer",
                 "aud": access_token.resource,  # RFC 8707 audience claim
+                "sub": access_token.subject,  # RFC 7662 subject
+                "iss": str(server_settings.server_url),
             }
         )
 

examples/servers/simple-auth/mcp_simple_auth/simple_auth_provider.py

@@ -186,6 +186,7 @@ class SimpleOAuthProvider(OAuthAuthorizationServerProvider[AuthorizationCode, Re
             scopes=[self.settings.mcp_scope],
             code_challenge=code_challenge,
             resource=resource,  # RFC 8707
+            subject=username,
         )
         self.auth_codes[new_code] = auth_code
 
@@ -224,6 +225,7 @@ class SimpleOAuthProvider(OAuthAuthorizationServerProvider[AuthorizationCode, Re
             scopes=authorization_code.scopes,
             expires_at=int(time.time()) + 3600,
             resource=authorization_code.resource,  # RFC 8707
+            subject=authorization_code.subject,
         )
 
         # Store user data mapping for this token

examples/servers/simple-auth/mcp_simple_auth/token_verifier.py

@@ -75,6 +75,8 @@ class IntrospectionTokenVerifier(TokenVerifier):
                     scopes=data.get("scope", "").split() if data.get("scope") else [],
                     expires_at=data.get("exp"),
                     resource=data.get("aud"),  # Include resource in token
+                    subject=data.get("sub"),  # RFC 7662 subject (resource owner)
+                    claims=data,
                 )
             except Exception as e:
                 logger.warning(f"Token introspection failed: {e}")