diff --git a/docs/api.rst b/docs/api.rst
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -13,7 +13,7 @@
 asynchronously assembling **bundles** of related source code objects, caching,
 and garbage collecting them as needed.
 
-The Vault is accessible via a RESTful API documented below.
+The Vault is accessible via a RPC API documented below.
 
 All endpoints are mounted at API root, which is currently at
 https://archive.softwareheritage.org/api/1/.