diff --git a/.changeset/brave-candles-knock.md b/.changeset/brave-candles-knock.md
new file mode 100644
index 0000000000..1a6f187527
--- /dev/null
+++ b/.changeset/brave-candles-knock.md
@@ -0,0 +1,5 @@
+---
+'@backstage/backend-common': patch
+---
+
+Added placeholder for `listPublicServiceKeys()` in the `AuthService` returned by `createLegacyAuthAdapters`.
diff --git a/.changeset/kind-turkeys-travel.md b/.changeset/kind-turkeys-travel.md
new file mode 100644
index 0000000000..97dc1c6c8d
--- /dev/null
+++ b/.changeset/kind-turkeys-travel.md
@@ -0,0 +1,5 @@
+---
+'@backstage/backend-plugin-api': patch
+---
+
+Added a new required `listPublicServiceKeys` to `AuthService`.
diff --git a/.changeset/red-years-double.md b/.changeset/red-years-double.md
new file mode 100644
index 0000000000..8a891a48c9
--- /dev/null
+++ b/.changeset/red-years-double.md
@@ -0,0 +1,5 @@
+---
+'@backstage/backend-test-utils': patch
+---
+
+Added mock of the new `listPublicServiceKeys` method for `AuthService`.