diff --git a/src/Grafoscopio/GrafoscopioNode.class.st b/src/Grafoscopio/GrafoscopioNode.class.st
index 3f668c3..dd87b51 100644
--- a/src/Grafoscopio/GrafoscopioNode.class.st
+++ b/src/Grafoscopio/GrafoscopioNode.class.st
@@ -55,6 +55,19 @@ GrafoscopioNode class >> clipboard: anObject [
 	clipboard := anObject
 ]
 
+{ #category : #utility }
+GrafoscopioNode class >> contentProviders [
+	"I list the domains of certain providers that are treated specially, because they
+	store and offer content like Smalltalk playgrounds or source code, that can be used
+	in particular ways while importing or exporting content in a node."
+
+	^ Dictionary new 
+	  at: 'playgrounds' put: #('ws.stfx.eu');
+	  at: 'fossil' put: #('mutabit.com/repos.fossil');
+	  at: 'etherpads' put: #('pad.tupale.co' );
+	  yourself.
+]
+
 { #category : #utility }
 GrafoscopioNode class >> specialWords [
 	"I return a list of word that were used in the first versions of Grafoscopio to mark node