diff --git a/backend/druks/services/base.py b/backend/druks/services/base.py
index fb6976be..3b61e903 100644
--- a/backend/druks/services/base.py
+++ b/backend/druks/services/base.py
@@ -33,6 +33,10 @@ def scopes(self) -> list[str]:
     def identity(self) -> dict[str, Any]:
         return self.row.identity
 
+    @property
+    def account_id(self) -> str:
+        return self.row.account_id
+
     @property
     def connected_at(self):
         return self.row.connected_at
diff --git a/backend/tests/test_services.py b/backend/tests/test_services.py
index 7a558b2e..98a87acd 100644
--- a/backend/tests/test_services.py
+++ b/backend/tests/test_services.py
@@ -520,6 +520,7 @@ class Digest:
     assert [connection.id for connection in connections] == [row.id]
     assert connections[0].scopes == ["profile.read"]
     assert connections[0].identity == {"email": "night@acme.test"}
+    assert connections[0].account_id == SYSTEM_ACCOUNT_ID
     assert NightWatch.acme.get(row.id).id == row.id
     assert not NightWatch.acme.get("missing")
 
diff --git a/docs/writing-an-extension.md b/docs/writing-an-extension.md
index bf5352f1..13ac6e44 100644
--- a/docs/writing-an-extension.md
+++ b/docs/writing-an-extension.md
@@ -842,7 +842,8 @@ for connection in NightWatch.acme.list_for_account(account_id):
 `current_account_id.get()` in a route, the handler's argument in a
 subscriber. `NightWatch.acme.get(connection_id)` returns one connection
 when your own row stored its id. Each connection carries `id`, `scopes`, `identity` — the
-provider's facts for the sign-in — and `connected_at`. The handle serves
+provider's facts for the sign-in — `account_id` — the druks account that
+signed it in — and `connected_at`. The handle serves
 live connections only. A revoked connection drops out of `get` and
 `list_for_account`, but its platform row survives with its owner and
 identity. Your rows never need tombstone copies of either.