diff --git a/ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/core/Gas.java b/ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/core/Gas.java
index 94ef1ca977..003375b049 100644
--- a/ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/core/Gas.java
+++ b/ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/core/Gas.java
@@ -149,4 +149,8 @@ public boolean equals(final Object obj) {
   public String toString() {
     return Long.toString(value);
   }
+
+  public String toHexString() {
+    return String.format("0x%s", Long.toHexString(value));
+  }
 }
diff --git a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/JsonRpcMethodsFactory.java b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/JsonRpcMethodsFactory.java
index 9e61c3f154..60103deed5 100644
--- a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/JsonRpcMethodsFactory.java
+++ b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/JsonRpcMethodsFactory.java
@@ -79,6 +79,7 @@
 import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.NetServices;
 import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.NetVersion;
 import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.RpcModules;
+import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.TraceReplayBlockTransactions;
 import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.TxPoolPantheonStatistics;
 import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.TxPoolPantheonTransactions;
 import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.Web3ClientVersion;
@@ -333,6 +334,19 @@ blockchainQueries, new TransactionTracer(blockReplay), parameter),
           new AdminChangeLogLevel(parameter));
     }
 
+    if (rpcApis.contains(RpcApis.TRACE)) {
+      addMethods(
+          enabledMethods,
+          new TraceReplayBlockTransactions(
+              parameter,
+              new BlockTracer(
+                  new BlockReplay(
+                      protocolSchedule,
+                      blockchainQueries.getBlockchain(),
+                      blockchainQueries.getWorldStateArchive())),
+              blockchainQueries));
+    }
+
     boolean eea = rpcApis.contains(RpcApis.EEA), priv = rpcApis.contains(RpcApis.PRIV);
     if (eea || priv) {
       final PrivateMarkerTransactionFactory markerTransactionFactory =
diff --git a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/RpcApis.java b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/RpcApis.java
index 3d17901110..dc9ee078aa 100644
--- a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/RpcApis.java
+++ b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/RpcApis.java
@@ -28,6 +28,7 @@ public class RpcApis {
   public static final RpcApi EEA = new RpcApi("EEA");
   public static final RpcApi PRIV = new RpcApi("PRIV");
   public static final RpcApi TX_POOL = new RpcApi("TXPOOL");
+  public static final RpcApi TRACE = new RpcApi("TRACE");
 
   public static final List<RpcApi> DEFAULT_JSON_RPC_APIS = Arrays.asList(ETH, NET, WEB3);
 
@@ -52,6 +53,8 @@ public static Optional<RpcApi> valueOf(final String name) {
       return Optional.of(PRIV);
     } else if (name.equals(TX_POOL.getCliValue())) {
       return Optional.of(TX_POOL);
+    } else if (name.equals(TRACE.getCliValue())) {
+      return Optional.of(TRACE);
     } else {
       return Optional.empty();
     }
diff --git a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/methods/TraceReplayBlockTransactions.java b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/methods/TraceReplayBlockTransactions.java
index 1dcd29207f..2c1e4a6731 100644
--- a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/methods/TraceReplayBlockTransactions.java
+++ b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/methods/TraceReplayBlockTransactions.java
@@ -12,8 +12,11 @@
  */
 package tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods;
 
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
 import tech.pegasys.pantheon.ethereum.core.Block;
 import tech.pegasys.pantheon.ethereum.core.BlockHeader;
+import tech.pegasys.pantheon.ethereum.core.Gas;
 import tech.pegasys.pantheon.ethereum.debug.TraceOptions;
 import tech.pegasys.pantheon.ethereum.jsonrpc.RpcMethod;
 import tech.pegasys.pantheon.ethereum.jsonrpc.internal.JsonRpcRequest;
@@ -27,10 +30,12 @@
 import tech.pegasys.pantheon.ethereum.vm.DebugOperationTracer;
 
 import java.util.List;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import tech.pegasys.pantheon.util.bytes.BytesValue;
 
 public class TraceReplayBlockTransactions extends AbstractBlockParameterMethod {
 
@@ -82,23 +87,59 @@ private Object traceBlock(final Block block, final TraceTypeParameter traceTypeP
         .orElse(null);
   }
 
-  private List<JsonNode> formatTraces(
+  private JsonNode formatTraces(
       final List<TransactionTrace> traces, final TraceTypeParameter traceTypeParameter) {
-    return traces.stream()
-        .map((trace) -> formatTrace(trace, traceTypeParameter))
-        .collect(Collectors.toList());
+    final Set<TraceTypeParameter.TraceType> traceTypes = traceTypeParameter.getTraceTypes();
+    final ObjectMapper mapper = new ObjectMapper();
+    final ArrayNode resultArrayNode = mapper.createArrayNode();
+    final ObjectNode resultNode = mapper.createObjectNode();
+    if (traceTypes.contains(TraceTypeParameter.TraceType.TRACE)) {
+      final ArrayNode tracesNode = resultNode.putArray("trace");
+      traces.forEach((trace) -> formatWithTraceOption(trace, mapper, tracesNode));
+    }
+
+    resultArrayNode.add(resultNode);
+    return resultArrayNode;
   }
 
   @SuppressWarnings("unused")
-  private JsonNode formatTrace(
-      final TransactionTrace trace, final TraceTypeParameter traceTypeParameter) {
-    // TODO: generate result
-    ObjectMapper mapper = new ObjectMapper();
-    return mapper.createObjectNode();
+  private void formatWithTraceOption(
+      final TransactionTrace trace, final ObjectMapper mapper, final ArrayNode tracesNode) {
+    final ObjectNode traceNode = mapper.createObjectNode();
+    generateActionNode(traceNode, trace);
+    generateResultNode(traceNode, trace);
+    traceNode.put("type", "call");
+    tracesNode.add(traceNode);
+  }
+
+  private void generateResultNode(final ObjectNode traceNode, final TransactionTrace trace) {
+    final ObjectNode traceResultNode = traceNode.putObject("result");
+    traceResultNode.put("output", "0x");
+    traceResultNode.put("gasUsed", Gas.of(trace.getGas()).toHexString());
+  }
+
+  private void generateActionNode(final ObjectNode traceNode, final TransactionTrace trace) {
+    final ObjectNode actionResultNode = traceNode.putObject("action");
+    actionResultNode.put("callType", "call");
+    actionResultNode.put("from", trace.getTransaction().getSender().toString());
+    actionResultNode.put(
+        "gas", trace.getTransaction().getUpfrontGasCost().toStrictShortHexString());
+    actionResultNode.put(
+        "input",
+        trace
+            .getTransaction()
+            .getData()
+            .orElse(trace.getTransaction().getInit().orElse(BytesValue.EMPTY))
+            .toString());
+    trace
+        .getTransaction()
+        .getTo()
+        .ifPresent(address -> actionResultNode.put("to", address.toString()));
+    actionResultNode.put("value", trace.getTransaction().getValue().toStrictShortHexString());
   }
 
   private Object emptyResult() {
-    ObjectMapper mapper = new ObjectMapper();
+    final ObjectMapper mapper = new ObjectMapper();
     return mapper.createArrayNode();
   }
 }
diff --git a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/parameters/TraceTypeParameter.java b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/parameters/TraceTypeParameter.java
index 059cc0677f..8b13ba9dc5 100644
--- a/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/parameters/TraceTypeParameter.java
+++ b/ethereum/jsonrpc/src/main/java/tech/pegasys/pantheon/ethereum/jsonrpc/internal/parameters/TraceTypeParameter.java
@@ -25,7 +25,7 @@
 
 public class TraceTypeParameter {
 
-  enum TraceType {
+  public enum TraceType {
     TRACE,
     VM_TRACE,
     STATE_DIFF;