diff --git a/docs/pages/guides/backend_api.mdx b/docs/pages/guides/backend_api.mdx
index d7456aa..8438e75 100644
--- a/docs/pages/guides/backend_api.mdx
+++ b/docs/pages/guides/backend_api.mdx
@@ -82,6 +82,8 @@ query getObjects {
 }
 ```
 
+A preview testnet `GraphQL` endpoint is available at [https://dmtr_scrolls_v0_preview_1t9nhgnmxtpzrzm2gwv0723cu.scrolls-m0.demeter.run/graphql](https://dmtr_scrolls_v0_preview_1t9nhgnmxtpzrzm2gwv0723cu.scrolls-m0.demeter.run/graphql).
+
 ## Implementation Details
 
 The backend uses a SQL query with a Manhattan distance calculation to find objects within the specified radius. The query ensures that the objects are within the bounds defined by the radius and the center point.