diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClient.java b/service/src/main/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClient.java
index d200bb806..7e54ca7de 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClient.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClient.java
@@ -30,14 +30,19 @@ public class SecureStorageClient {
 
     private final ExternalServiceCredentialGenerator storageServiceCredentialGenerator;
     private final URI                                deleteUri;
+    private final URI                                getManifestUri;
     private final FaultTolerantHttpClient            httpClient;
 
     @VisibleForTesting
     static final String DELETE_PATH = "/v1/storage";
 
+    @VisibleForTesting
+    static final String GET_MANIFEST_PATH = "/v1/storage/manifest";
+
     public SecureStorageClient(final ExternalServiceCredentialGenerator storageServiceCredentialGenerator, final Executor executor, final SecureStorageServiceConfiguration configuration) throws CertificateException {
         this.storageServiceCredentialGenerator = storageServiceCredentialGenerator;
         this.deleteUri                         = URI.create(configuration.getUri()).resolve(DELETE_PATH);
+        this.getManifestUri                    = URI.create(configuration.getUri()).resolve(GET_MANIFEST_PATH);
         this.httpClient                        = FaultTolerantHttpClient.newBuilder()
                                                                         .withCircuitBreaker(configuration.getCircuitBreakerConfiguration())
                                                                         .withRetry(configuration.getRetryConfiguration())
@@ -68,4 +73,24 @@ public class SecureStorageClient {
             throw new RuntimeException("Failed to delete storage service data: " + response.statusCode());
         });
     }
+
+    public CompletableFuture<Boolean> hasStoredData(final UUID accountUuid) {
+      final ExternalServiceCredentials credentials = storageServiceCredentialGenerator.generateFor(accountUuid.toString());
+
+      final HttpRequest request = HttpRequest.newBuilder()
+          .uri(getManifestUri)
+          .GET()
+          .header("Authorization", "Basic " + Base64.encodeBytes((credentials.getUsername() + ":" + credentials.getPassword()).getBytes(StandardCharsets.UTF_8)))
+          .build();
+
+      return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString()).thenApply(response -> {
+        if (response.statusCode() >= 200 && response.statusCode() < 300) {
+          return true;
+        } else if (response.statusCode() == 404) {
+          return false;
+        }
+
+        throw new RuntimeException("Failed to check for presence of manifest: " + response.statusCode());
+      });
+    }
 }
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClientTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClientTest.java
index 39306c27a..0bae3a950 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClientTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/securestorage/SecureStorageClientTest.java
@@ -27,9 +27,12 @@ import java.util.concurrent.TimeUnit;
 
 import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
 import static com.github.tomakehurst.wiremock.client.WireMock.delete;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
 import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
 import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.options;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
@@ -118,4 +121,46 @@ public class SecureStorageClientTest {
 
         assertThrows(RuntimeException.class, () -> secureStorageClient.deleteStoredData(accountUuid).join());
     }
+
+  @Test
+  public void hasManifest() {
+    final String username = RandomStringUtils.randomAlphabetic(16);
+    final String password = RandomStringUtils.randomAlphanumeric(32);
+
+    when(credentialGenerator.generateFor(accountUuid.toString())).thenReturn(new ExternalServiceCredentials(username, password));
+
+    wireMockRule.stubFor(get(urlEqualTo(SecureStorageClient.GET_MANIFEST_PATH))
+        .withBasicAuth(username, password)
+        .willReturn(aResponse().withStatus(200)));
+
+    assertTrue(secureStorageClient.hasStoredData(accountUuid).join());
+  }
+
+  @Test
+  public void hasManifesNotFound() {
+    final String username = RandomStringUtils.randomAlphabetic(16);
+    final String password = RandomStringUtils.randomAlphanumeric(32);
+
+    when(credentialGenerator.generateFor(accountUuid.toString())).thenReturn(new ExternalServiceCredentials(username, password));
+
+    wireMockRule.stubFor(get(urlEqualTo(SecureStorageClient.GET_MANIFEST_PATH))
+        .withBasicAuth(username, password)
+        .willReturn(aResponse().withStatus(404)));
+
+    assertFalse(secureStorageClient.hasStoredData(accountUuid).join());
+  }
+
+  @Test
+  public void hasManifestFailure() {
+    final String username = RandomStringUtils.randomAlphabetic(16);
+    final String password = RandomStringUtils.randomAlphanumeric(32);
+
+    when(credentialGenerator.generateFor(accountUuid.toString())).thenReturn(new ExternalServiceCredentials(username, password));
+
+    wireMockRule.stubFor(get(urlEqualTo(SecureStorageClient.GET_MANIFEST_PATH))
+        .withBasicAuth(username, password)
+        .willReturn(aResponse().withStatus(400)));
+
+    assertThrows(RuntimeException.class, () -> secureStorageClient.hasStoredData(accountUuid).join());
+  }
 }