diff --git a/supabase/migrations/20260325000000_add_get_leaflet_page_data.sql b/supabase/migrations/20260325000000_add_get_leaflet_page_data.sql
new file mode 100644
index 00000000..dc5c0399
--- /dev/null
+++ b/supabase/migrations/20260325000000_add_get_leaflet_page_data.sql
@@ -0,0 +1,100 @@
+CREATE OR REPLACE FUNCTION public.get_leaflet_page_data(p_token_id uuid)
+RETURNS TABLE (
+  permission_token json,
+  permission_token_rights json,
+  leaflets_in_publications json,
+  leaflets_to_documents json,
+  custom_domain_routes json,
+  facts json
+)
+LANGUAGE sql STABLE
+AS $$
+WITH token AS (
+  SELECT pt.*
+  FROM permission_tokens pt
+  WHERE pt.id = p_token_id
+),
+token_rights AS (
+  SELECT json_agg(row_to_json(ptr)) AS rights, array_agg(ptr.entity_set) AS entity_sets
+  FROM permission_token_rights ptr
+  WHERE ptr.token = p_token_id
+),
+related_tokens AS (
+  SELECT array_agg(pt2.id) AS ids
+  FROM permission_token_rights ptr2
+  JOIN permission_tokens pt2 ON pt2.id = ptr2.token
+  WHERE ptr2.entity_set IN (SELECT unnest(entity_sets) FROM token_rights)
+    AND pt2.id != p_token_id
+),
+lip_direct AS (
+  SELECT json_agg(row_to_json(sub)) AS data
+  FROM (
+    SELECT lip.*,
+      row_to_json(pub) AS publications,
+      row_to_json(d) AS documents
+    FROM leaflets_in_publications lip
+    LEFT JOIN publications pub ON pub.uri = lip.publication
+    LEFT JOIN documents d ON d.uri = lip.doc
+    WHERE lip.leaflet = p_token_id
+  ) sub
+),
+lip_fallback AS (
+  SELECT json_agg(row_to_json(sub)) AS data
+  FROM (
+    SELECT lip.*,
+      row_to_json(pub) AS publications,
+      row_to_json(d) AS documents
+    FROM leaflets_in_publications lip
+    LEFT JOIN publications pub ON pub.uri = lip.publication
+    LEFT JOIN documents d ON d.uri = lip.doc
+    WHERE lip.leaflet IN (SELECT unnest(ids) FROM related_tokens)
+  ) sub
+),
+ltd_direct AS (
+  SELECT json_agg(row_to_json(sub)) AS data
+  FROM (
+    SELECT ltd.*,
+      row_to_json(doc) AS documents
+    FROM leaflets_to_documents ltd
+    LEFT JOIN documents doc ON doc.uri = ltd.document
+    WHERE ltd.leaflet = p_token_id
+  ) sub
+),
+ltd_fallback AS (
+  SELECT json_agg(row_to_json(sub)) AS data
+  FROM (
+    SELECT ltd.*,
+      row_to_json(doc) AS documents
+    FROM leaflets_to_documents ltd
+    LEFT JOIN documents doc ON doc.uri = ltd.document
+    WHERE ltd.leaflet IN (SELECT unnest(ids) FROM related_tokens)
+  ) sub
+),
+cdr AS (
+  SELECT json_agg(row_to_json(c)) AS data
+  FROM custom_domain_routes c
+  WHERE c.edit_permission_token = p_token_id
+),
+facts AS (
+  SELECT json_agg(row_to_json(f)) AS data
+  FROM get_facts((SELECT root_entity FROM token)) f
+)
+SELECT
+  row_to_json(token) AS permission_token,
+  (SELECT rights FROM token_rights) AS permission_token_rights,
+  COALESCE((SELECT data FROM lip_direct), (SELECT data FROM lip_fallback)) AS leaflets_in_publications,
+  COALESCE((SELECT data FROM ltd_direct), (SELECT data FROM ltd_fallback)) AS leaflets_to_documents,
+  (SELECT data FROM cdr) AS custom_domain_routes,
+  (SELECT data FROM facts) AS facts
+FROM token;
+$$;
+
+-- Indexes for get_leaflet_page_data query patterns
+CREATE INDEX IF NOT EXISTS leaflets_in_publications_leaflet_idx
+  ON public.leaflets_in_publications(leaflet);
+
+CREATE INDEX IF NOT EXISTS permission_token_rights_entity_set_idx
+  ON public.permission_token_rights(entity_set);
+
+CREATE INDEX IF NOT EXISTS custom_domain_routes_edit_permission_token_idx
+  ON public.custom_domain_routes(edit_permission_token);