diff --git a/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java b/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java
index e733ac3dc8..26993e6d39 100644
--- a/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java
+++ b/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java
@@ -31,13 +31,12 @@
 import tech.pegasys.pantheon.Runner;
 import tech.pegasys.pantheon.RunnerBuilder;
 import tech.pegasys.pantheon.cli.PublicKeySubCommand.KeyLoader;
+import tech.pegasys.pantheon.cli.converter.RpcApisConverter;
 import tech.pegasys.pantheon.cli.custom.CorsAllowedOriginsProperty;
 import tech.pegasys.pantheon.cli.custom.JsonRPCWhitelistHostsProperty;
 import tech.pegasys.pantheon.cli.custom.RpcAuthFileValidator;
 import tech.pegasys.pantheon.cli.rlp.RLPSubCommand;
 import tech.pegasys.pantheon.config.GenesisConfigFile;
-import tech.pegasys.pantheon.consensus.clique.jsonrpc.CliqueRpcApis;
-import tech.pegasys.pantheon.consensus.ibft.jsonrpc.IbftRpcApis;
 import tech.pegasys.pantheon.controller.KeyPairUtil;
 import tech.pegasys.pantheon.controller.PantheonController;
 import tech.pegasys.pantheon.ethereum.core.Address;
@@ -86,10 +85,8 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.Set;
-import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 import com.google.common.base.Suppliers;
 import com.google.common.collect.ImmutableMap;
@@ -124,29 +121,6 @@
     footer = "Pantheon is licensed under the Apache License 2.0")
 public class PantheonCommand implements DefaultCommandValues, Runnable {
 
-  static class RpcApisConverter implements CommandLine.ITypeConverter<RpcApi> {
-
-    @Override
-    public RpcApi convert(final String name) throws RpcApisConversionException {
-      final String uppercaseName = name.trim().toUpperCase();
-
-      return Stream.<Function<String, Optional<RpcApi>>>of(
-              RpcApis::valueOf, CliqueRpcApis::valueOf, IbftRpcApis::valueOf)
-          .map(f -> f.apply(uppercaseName))
-          .filter(Optional::isPresent)
-          .map(Optional::get)
-          .findFirst()
-          .orElseThrow(() -> new RpcApisConversionException("Invalid value: " + name));
-    }
-  }
-
-  static class RpcApisConversionException extends Exception {
-
-    public RpcApisConversionException(final String s) {
-      super(s);
-    }
-  }
-
   private final Logger logger;
 
   private CommandLine commandLine;
diff --git a/pantheon/src/main/java/tech/pegasys/pantheon/cli/converter/RpcApisConverter.java b/pantheon/src/main/java/tech/pegasys/pantheon/cli/converter/RpcApisConverter.java
new file mode 100644
index 0000000000..44f010c4b7
--- /dev/null
+++ b/pantheon/src/main/java/tech/pegasys/pantheon/cli/converter/RpcApisConverter.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2019 ConsenSys AG.
+ *
+ * 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 tech.pegasys.pantheon.cli.converter;
+
+import tech.pegasys.pantheon.cli.converter.exception.RpcApisConversionException;
+import tech.pegasys.pantheon.consensus.clique.jsonrpc.CliqueRpcApis;
+import tech.pegasys.pantheon.consensus.ibft.jsonrpc.IbftRpcApis;
+import tech.pegasys.pantheon.ethereum.jsonrpc.RpcApi;
+import tech.pegasys.pantheon.ethereum.jsonrpc.RpcApis;
+
+import java.util.Optional;
+import java.util.function.Function;
+import java.util.stream.Stream;
+
+import picocli.CommandLine;
+
+public class RpcApisConverter implements CommandLine.ITypeConverter<RpcApi> {
+
+  @Override
+  public RpcApi convert(final String name) throws RpcApisConversionException {
+    return Stream.<Function<String, Optional<RpcApi>>>of(
+            RpcApis::valueOf, CliqueRpcApis::valueOf, IbftRpcApis::valueOf)
+        .map(f -> f.apply(name.trim().toUpperCase()))
+        .filter(Optional::isPresent)
+        .map(Optional::get)
+        .findFirst()
+        .orElseThrow(() -> new RpcApisConversionException(name));
+  }
+}
diff --git a/pantheon/src/main/java/tech/pegasys/pantheon/cli/converter/exception/RpcApisConversionException.java b/pantheon/src/main/java/tech/pegasys/pantheon/cli/converter/exception/RpcApisConversionException.java
new file mode 100644
index 0000000000..8a3e2a2cc1
--- /dev/null
+++ b/pantheon/src/main/java/tech/pegasys/pantheon/cli/converter/exception/RpcApisConversionException.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2019 ConsenSys AG.
+ *
+ * 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 tech.pegasys.pantheon.cli.converter.exception;
+
+import static java.lang.String.format;
+
+public final class RpcApisConversionException extends Exception {
+
+  public RpcApisConversionException(final String name) {
+    super(format("Invalid value: %s", name));
+  }
+}