diff --git a/config/initializers/graphiql.rb b/config/initializers/graphiql.rb
new file mode 100644
index 000000000..65a8eeb28
--- /dev/null
+++ b/config/initializers/graphiql.rb
@@ -0,0 +1,79 @@
+DEFAULT_QUERY = "# La documentation officielle de la spécification (Anglais) : https://graphql.org/
+# Une introduction aux concepts et raisons d'être de GraphQL (Français) : https://blog.octo.com/graphql-et-pourquoi-faire/
+# Le schema GraphQL de demarches-simplifiees.fr : https://demarches-simplifiees-graphql.netlify.com
+# Le endpoint GraphQL de demarches-simplifiees.fr : https://demarches-simplifiees.fr/api/v2/graphql
+
+query getDemarche($demarcheNumber: Int!) {
+  demarche(number: $demarcheNumber) {
+    id
+    number
+    title
+    champDescriptors {
+      id
+      type
+      label
+    }
+    dossiers(first: 3) {
+      nodes {
+        id
+        number
+        datePassageEnConstruction
+        datePassageEnInstruction
+        dateTraitement
+        usager {
+          email
+        }
+        champs {
+          id
+          label
+          ... on TextChamp {
+            value
+          }
+          ... on DecimalNumberChamp {
+            value
+          }
+          ... on IntegerNumberChamp {
+            value
+          }
+          ... on CheckboxChamp {
+            value
+          }
+          ... on DateChamp {
+            value
+          }
+          ... on DossierLinkChamp {
+            dossier {
+              id
+            }
+          }
+          ... on MultipleDropDownListChamp {
+            values
+          }
+          ... on LinkedDropDownListChamp {
+            primaryValue
+            secondaryValue
+          }
+          ... on PieceJustificativeChamp {
+            url
+          }
+          ... on CarteChamp {
+            geoAreas {
+              source
+              geometry {
+                type
+                coordinates
+              }
+            }
+          }
+        }
+      }
+      pageInfo {
+        hasNextPage
+        endCursor
+      }
+    }
+  }
+}"
+
+GraphiQL::Rails.config.initial_query = DEFAULT_QUERY
+GraphiQL::Rails.config.title = 'demarches-simplifiees.fr'