diff --git a/service/src/main/java/bio/terra/externalcreds/models/DistributedLock.java b/service/src/main/java/bio/terra/externalcreds/models/DistributedLock.java
new file mode 100644
index 00000000..ddbf19de
--- /dev/null
+++ b/service/src/main/java/bio/terra/externalcreds/models/DistributedLock.java
@@ -0,0 +1,15 @@
+package bio.terra.externalcreds.models;
+
+import java.sql.Timestamp;
+import org.immutables.value.Value;
+
+@Value.Immutable
+public interface DistributedLock {
+  String getLockName();
+
+  String getUserId();
+
+  Timestamp getExpiresAt();
+
+  //  class Builder extends ImmutableDistributedLock.Builder {}
+}
diff --git a/service/src/main/java/bio/terra/externalcreds/models/FenceAccountKey.java b/service/src/main/java/bio/terra/externalcreds/models/FenceAccountKey.java
new file mode 100644
index 00000000..e3d93c8b
--- /dev/null
+++ b/service/src/main/java/bio/terra/externalcreds/models/FenceAccountKey.java
@@ -0,0 +1,16 @@
+package bio.terra.externalcreds.models;
+
+import java.sql.Timestamp;
+import java.util.Optional;
+import org.immutables.value.Value;
+
+@Value.Immutable
+public interface FenceAccountKey {
+  Integer getId();
+
+  Optional<String> getKeyJson();
+
+  Timestamp getExpiresAt();
+
+  //  class Builder extends ImmutableFenceAccountKey.Builder {}
+}