diff --git a/context.go b/context.go
index 3d263de..e48e6d2 100644
--- a/context.go
+++ b/context.go
@@ -1240,6 +1240,11 @@ func NewContext(db * badger.DB, log Logger) (*Context, error) {
     return nil, err
   }
 
+  err = ctx.RegisterNodeType(BaseNodeType, []ExtType{})
+  if err != nil {
+    return nil, err
+  }
+
   err = ctx.RegisterNodeType(GQLNodeType, []ExtType{GroupExtType, GQLExtType})
   if err != nil {
     return nil, err
diff --git a/gql.go b/gql.go
index 1b12b18..4c064a1 100644
--- a/gql.go
+++ b/gql.go
@@ -31,6 +31,25 @@ import (
   "github.com/google/uuid"
 )
 
+func AuthorizationHeader(node *Node) (string, error) {
+  key_ser, err := x509.MarshalPKCS8PrivateKey(node.Key)
+  if err != nil {
+    return "", err
+  }
+
+  id_bytes, err := node.ID.MarshalBinary()
+  if err != nil {
+    return "", err
+  }
+  id_str := base64.StdEncoding.EncodeToString(id_bytes)
+  key_str := base64.StdEncoding.EncodeToString(key_ser)
+
+  bytes := append([]byte(id_str), ':')
+  bytes = append(bytes, []byte(key_str)...)
+
+  return base64.StdEncoding.EncodeToString(bytes), nil
+}
+
 func NodeInterfaceDefaultIsType(required_extensions []ExtType) func(graphql.IsTypeOfParams) bool {
   return func(p graphql.IsTypeOfParams) bool {
     ctx, ok := p.Context.Value("resolve").(*ResolveContext)
diff --git a/serialize.go b/serialize.go
index 94338d8..4112469 100644
--- a/serialize.go
+++ b/serialize.go
@@ -85,6 +85,7 @@ var (
   GroupExtType    = NewExtType("GROUP")
 
   GQLNodeType = NewNodeType("GQL")
+  BaseNodeType = NewNodeType("BASE")
 
   StopSignalType       = NewSignalType("STOP")
   CreateSignalType     = NewSignalType("CREATE")