diff --git a/core/src/main/java/google/registry/tools/ListTxnsCommand.java b/core/src/main/java/google/registry/tools/ListTxnsCommand.java
new file mode 100644
index 000000000..b50f66a7f
--- /dev/null
+++ b/core/src/main/java/google/registry/tools/ListTxnsCommand.java
@@ -0,0 +1,116 @@
+// Copyright 2022 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.tools;
+
+import static google.registry.persistence.transaction.TransactionManagerFactory.replicaJpaTm;
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import com.beust.jcommander.Parameter;
+import com.beust.jcommander.Parameters;
+import com.google.common.base.Splitter;
+import com.google.common.io.BaseEncoding;
+import google.registry.model.common.Cursor;
+import google.registry.persistence.transaction.Transaction;
+import google.registry.persistence.transaction.TransactionEntity;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.List;
+
+/** Lists {@link Cursor} timestamps used by locking rolling cursor tasks, like in RDE. */
+@Parameters(separators = " =", commandDescription = "Lists the contents of the Transaction table.")
+final class ListTxnsCommand implements CommandWithRemoteApi {
+
+  @Parameter(names = "--infile", description = "Parse an input file instead of reading from db.")
+  private String infile;
+
+  @Parameter(
+      names = "--full_dump",
+      description =
+          "Do a full dump of the contents of the transaction.  Without this, "
+              + "just write transactions as CSV lines suitable for ingestion via --infile.")
+  private boolean fullDump = false;
+
+  @Override
+  public void run() {
+    if (infile == null) {
+      fetchFromDb();
+    } else {
+      parseCsvFile();
+    }
+  }
+
+  private void parseCsvFile() {
+    try {
+      BufferedReader src = Files.newBufferedReader(Paths.get(infile), UTF_8);
+      String line;
+      while ((line = src.readLine()) != null) {
+        List<String> cols = Splitter.on(",").splitToList(line);
+        writeRecord(Integer.parseInt(cols.get(0)), BaseEncoding.base64().decode(cols.get(1)));
+      }
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  private void fetchFromDb() {
+    long lastTransactionId = 0;
+    List<TransactionEntity> results;
+
+    do {
+      final long txnId = lastTransactionId; // For use in the lambda.
+      results =
+          replicaJpaTm()
+              .transact(
+                  () ->
+                      replicaJpaTm()
+                          .query(
+                              "select t from TransactionEntity t where id > :lastTransactionId",
+                              TransactionEntity.class)
+                          .setParameter("lastTransactionId", txnId)
+                          .setMaxResults(1000)
+                          .getResultList());
+
+      for (TransactionEntity txn : results) {
+        writeRecord(txn.getId(), txn.getContents());
+        lastTransactionId = txn.getId();
+      }
+    } while (results.size() > 0);
+  }
+
+  private void writeRecord(long id, byte[] contents) {
+    if (fullDump) {
+      Transaction txn;
+      try {
+        txn = Transaction.deserialize(contents);
+      } catch (IOException ex) {
+        System.err.printf("Error deserializing transaction %s\n", id);
+        return;
+      }
+      System.out.printf("transaction %s <<<\n", id);
+      for (Transaction.Mutation mut : txn.getMutations()) {
+        if (mut instanceof Transaction.Update) {
+          System.out.println("updating: " + ((Transaction.Update) mut).getEntity());
+        } else {
+          System.out.println("deleting: " + ((Transaction.Delete) mut).getKey());
+        }
+      }
+      System.out.println(">>>");
+    } else {
+      System.out.printf("%s,%s\n", id, BaseEncoding.base64().encode(contents));
+    }
+  }
+}
diff --git a/core/src/main/java/google/registry/tools/RegistryCli.java b/core/src/main/java/google/registry/tools/RegistryCli.java
index 20e41dbf5..4eacacb7e 100644
--- a/core/src/main/java/google/registry/tools/RegistryCli.java
+++ b/core/src/main/java/google/registry/tools/RegistryCli.java
@@ -250,6 +250,8 @@ final class RegistryCli implements AutoCloseable, CommandRunner {
       // Cloud SQL after the database migration. Note that the DB password is stored in Datastore
       // and it is already initialized above.
       TransactionManagerFactory.setJpaTm(() -> component.nomulusToolJpaTransactionManager().get());
+      TransactionManagerFactory.setReplicaJpaTm(
+          () -> component.nomulusToolReplicaJpaTransactionManager().get());
     }
 
     command.run();
diff --git a/core/src/main/java/google/registry/tools/RegistryTool.java b/core/src/main/java/google/registry/tools/RegistryTool.java
index 2447c2e5b..54e64e459 100644
--- a/core/src/main/java/google/registry/tools/RegistryTool.java
+++ b/core/src/main/java/google/registry/tools/RegistryTool.java
@@ -92,6 +92,7 @@ public final class RegistryTool {
           .put("list_registrars", ListRegistrarsCommand.class)
           .put("list_reserved_lists", ListReservedListsCommand.class)
           .put("list_tlds", ListTldsCommand.class)
+          .put("list_txns", ListTxnsCommand.class)
           .put("load_snapshot", LoadSnapshotCommand.class)
           .put("load_test", LoadTestCommand.class)
           .put("lock_domain", LockDomainCommand.class)
diff --git a/core/src/main/java/google/registry/tools/RegistryToolComponent.java b/core/src/main/java/google/registry/tools/RegistryToolComponent.java
index 6429acd73..042a97578 100644
--- a/core/src/main/java/google/registry/tools/RegistryToolComponent.java
+++ b/core/src/main/java/google/registry/tools/RegistryToolComponent.java
@@ -33,6 +33,7 @@ import google.registry.keyring.api.KeyModule;
 import google.registry.keyring.kms.KmsModule;
 import google.registry.persistence.PersistenceModule;
 import google.registry.persistence.PersistenceModule.NomulusToolJpaTm;
+import google.registry.persistence.PersistenceModule.ReadOnlyReplicaJpaTm;
 import google.registry.persistence.transaction.JpaTransactionManager;
 import google.registry.privileges.secretmanager.SecretManagerModule;
 import google.registry.rde.RdeModule;
@@ -187,6 +188,9 @@ interface RegistryToolComponent {
   @NomulusToolJpaTm
   Lazy<JpaTransactionManager> nomulusToolJpaTransactionManager();
 
+  @ReadOnlyReplicaJpaTm
+  Lazy<JpaTransactionManager> nomulusToolReplicaJpaTransactionManager();
+
   @Component.Builder
   interface Builder {
     @BindsInstance