diff --git a/cmd/root.go b/cmd/root.go
index 2fb651c..bf1d7c6 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -31,7 +31,6 @@ var rootCmd = &cobra.Command{
 }
 
 func Execute() {
-	initialize()
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Fprintf(os.Stderr, "failed to start CLI: %s", err)
 		os.Exit(1)
@@ -39,14 +38,19 @@ func Execute() {
 }
 
 func init() {
-	rootCmd.PersistentFlags().BoolVarP(&config.Options.Verbose, "verbose", "v", false, "set the verbose flag")
+	cobra.OnInitialize(initialize)
+	rootCmd.PersistentFlags().BoolVarP(&config.Options.Verbose, "verbose", "v", config.Options.Verbose, "set the verbose flag")
 	rootCmd.PersistentFlags().StringVarP(&confPath, "config", "c", "", "set the config path")
 	rootCmd.PersistentFlags().StringVar(&config.Options.CachePath, "cache", "", "set the cache path")
 }
 
 func initialize() {
 	initConfig()
-	initEnv()
+	err := initEnv()
+	if err != nil {
+		fmt.Println(err)
+		fmt.Println("WARNING: Ignoring environment variables with errors.")
+	}
 }
 
 func initConfig() {
diff --git a/cmd/serve.go b/cmd/serve.go
index 2f35d18..5b8164f 100644
--- a/cmd/serve.go
+++ b/cmd/serve.go
@@ -36,10 +36,10 @@ var serveCmd = &cobra.Command{
 
 func init() {
 	serveCmd.Flags().StringVar(&config.Server.Issuer.Host, "host", "127.0.0.1", "set the identity provider host")
-	serveCmd.Flags().IntVar(&config.Server.Issuer.Port, "port", 3332, "set the identity provider port")
-	serveCmd.Flags().StringVar(&endpoints.Authorization, "endpoints.authorization", "", "set the authorization endpoint for the identity provider")
-	serveCmd.Flags().StringVar(&endpoints.Token, "endpoints.token", "", "set the token endpoint for the identity provider")
-	serveCmd.Flags().StringVar(&endpoints.JwksUri, "endpoints.jwks_uri", "", "set the JWKS endpoints for the identity provider")
+	serveCmd.Flags().IntVar(&config.Server.Issuer.Port, "port", config.Server.Issuer.Port, "set the identity provider port")
+	serveCmd.Flags().StringVar(&endpoints.Authorization, "endpoints.authorization", endpoints.Authorization, "set the authorization endpoint for the identity provider")
+	serveCmd.Flags().StringVar(&endpoints.Token, "endpoints.token", endpoints.Token, "set the token endpoint for the identity provider")
+	serveCmd.Flags().StringVar(&endpoints.JwksUri, "endpoints.jwks_uri", endpoints.JwksUri, "set the JWKS endpoints for the identity provider")
 
 	rootCmd.AddCommand(serveCmd)
 }
diff --git a/internal/config.go b/internal/config.go
index 9108ac1..67742bc 100644
--- a/internal/config.go
+++ b/internal/config.go
@@ -79,6 +79,8 @@ func NewConfig() Config {
 			Host: "127.0.0.1",
 			Port: 3333,
 			Issuer: server.IdentityProviderServer{
+				Host: "127.0.0.1",
+				Port: 3332,
 				Endpoints: oidc.Endpoints{
 					Authorization: "",
 					Token:         "",
diff --git a/internal/oidc/oidc.go b/internal/oidc/oidc.go
index f52e0c4..f7e4f96 100644
--- a/internal/oidc/oidc.go
+++ b/internal/oidc/oidc.go
@@ -75,6 +75,43 @@ func NewIdentityProvider() *IdentityProvider {
 	return p
 }
 
+func (p *IdentityProvider) NewEndpoints() *Endpoints {
+	return &Endpoints{
+		Authorization: p.Issuer + "/oauth/authorize",
+		Token:         p.Issuer + "/oauth/token",
+		Revocation:    p.Issuer + "/oauth/revocation",
+		Introspection: p.Issuer + "/oauth/introspect",
+		UserInfo:      p.Issuer + "/oauth/userinfo",
+		JwksUri:       p.Issuer + "/oauth/discovery/keys",
+	}
+}
+
+func (p *IdentityProvider) NewSupported() *Supported {
+	return &Supported{
+		ResponseTypes: []string{"code"},
+		ResponseModes: []string{"query"},
+		GrantTypes: []string{
+			"authorization_code",
+			"client_credentials",
+			"refresh_token",
+		},
+		TokenEndpointAuthMethods: []string{
+			"client_secret_basic",
+			"client_secret_post",
+		},
+		SubjectTypes:            []string{"public"},
+		IdTokenSigningAlgValues: []string{"RS256"},
+		ClaimTypes:              []string{"normal"},
+		Claims: []string{
+			"iss",
+			"sub",
+			"aud",
+			"exp",
+			"iat",
+		},
+	}
+}
+
 func (p *IdentityProvider) ParseServerConfig(data []byte) error {
 	// parse JSON into IdentityProvider fields
 	var ep Endpoints