diff --git a/onyxia-api/src/main/resources/schemas/ide/extraenv.json b/onyxia-api/src/main/resources/schemas/ide/extraenv.json
new file mode 100644
index 00000000..03c6c9dd
--- /dev/null
+++ b/onyxia-api/src/main/resources/schemas/ide/extraenv.json
@@ -0,0 +1,20 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "description": "environment variables available within your service",
+    "type": "array",
+    "default": [],
+    "items": {
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string",
+          "default": "CHANGE_ME",
+          "pattern": "^[^ ]+$"
+        },
+        "value": {
+          "type": "string",
+          "default": ""
+        }
+      }
+    }
+  }
\ No newline at end of file