diff --git a/core/src/main/java/tech/pegasys/web3signer/core/Eth1Runner.java b/core/src/main/java/tech/pegasys/web3signer/core/Eth1Runner.java
index 9da51a603..0fa92854e 100644
--- a/core/src/main/java/tech/pegasys/web3signer/core/Eth1Runner.java
+++ b/core/src/main/java/tech/pegasys/web3signer/core/Eth1Runner.java
@@ -28,7 +28,6 @@
 import tech.pegasys.web3signer.signing.ArtifactSigner;
 import tech.pegasys.web3signer.signing.ArtifactSignerProvider;
 import tech.pegasys.web3signer.signing.EthSecpArtifactSigner;
-import tech.pegasys.web3signer.signing.SecpArtifactSignature;
 import tech.pegasys.web3signer.signing.bulkloading.SecpAwsBulkLoader;
 import tech.pegasys.web3signer.signing.bulkloading.SecpAzureBulkLoader;
 import tech.pegasys.web3signer.signing.bulkloading.SecpV3KeystoresBulkLoader;
@@ -239,10 +238,6 @@ private MappedResults<ArtifactSigner> bulkloadV3Keystores() {
     return walletResults;
   }
 
-  private String formatSecpSignature(final SecpArtifactSignature signature) {
-    return SecpArtifactSignature.toBytes(signature).toHexString();
-  }
-
   private void registerSignerLoadingHealthCheck(
       final String name, final MappedResults<ArtifactSigner> result) {
     super.registerHealthCheckProcedure(
diff --git a/core/src/main/java/tech/pegasys/web3signer/core/routes/PublicKeysListRoute.java b/core/src/main/java/tech/pegasys/web3signer/core/routes/PublicKeysListRoute.java
index 6c9ff0dae..4e76858a6 100644
--- a/core/src/main/java/tech/pegasys/web3signer/core/routes/PublicKeysListRoute.java
+++ b/core/src/main/java/tech/pegasys/web3signer/core/routes/PublicKeysListRoute.java
@@ -20,14 +20,21 @@
 
 public class PublicKeysListRoute implements Web3SignerRoute {
 
-  private static final String PATH_FORMAT = "/api/v1/%s/publicKeys";
+  private static final String ETH1_PATH = "/api/v1/eth1/publicKeys";
+  private static final String ETH2_PATH = "/api/v1/eth2/publicKeys";
 
   private final Context context;
   private final String path;
 
   public PublicKeysListRoute(final Context context, final String mode) {
     this.context = context;
-    this.path = String.format(PATH_FORMAT, mode);
+    this.path =
+        switch (mode) {
+          case "eth1" -> ETH1_PATH;
+          case "eth2" -> ETH2_PATH;
+          default ->
+              throw new IllegalArgumentException("Unsupported mode for Public Key Route: " + mode);
+        };
   }
 
   @Override
diff --git a/core/src/main/java/tech/pegasys/web3signer/core/service/http/handlers/PublicKeysListHandler.java b/core/src/main/java/tech/pegasys/web3signer/core/service/http/handlers/PublicKeysListHandler.java
index 42252fbbe..d373b2916 100644
--- a/core/src/main/java/tech/pegasys/web3signer/core/service/http/handlers/PublicKeysListHandler.java
+++ b/core/src/main/java/tech/pegasys/web3signer/core/service/http/handlers/PublicKeysListHandler.java
@@ -16,6 +16,7 @@
 import static tech.pegasys.web3signer.core.service.http.handlers.ContentTypes.JSON_UTF_8;
 
 import tech.pegasys.web3signer.signing.ArtifactSignerProvider;
+import tech.pegasys.web3signer.signing.config.DefaultArtifactSignerProvider;
 
 import java.util.List;
 import java.util.stream.Collectors;
@@ -33,8 +34,11 @@ public PublicKeysListHandler(final List<ArtifactSignerProvider> artifactSignerPr
 
   @Override
   public void handle(final RoutingContext context) {
+    // at the moment, we only support DefaultArtifactSignerProvider subclass that contains primary
+    // key as identifiers
     final List<String> availableIdentifiers =
         artifactSignerProviders.stream()
+            .filter(provider -> provider instanceof DefaultArtifactSignerProvider)
             .flatMap(provider -> provider.availableIdentifiers().stream())
             .collect(Collectors.toList());