diff --git a/android/src/main/cpp/sonar.cpp b/android/src/main/cpp/sonar.cpp
index bcc043292..5d7208d69 100644
--- a/android/src/main/cpp/sonar.cpp
+++ b/android/src/main/cpp/sonar.cpp
@@ -514,6 +514,7 @@ class JFlipperConnectionImpl
     registerHybrid({
         makeNativeMethod("sendObject", JFlipperConnectionImpl::sendObject),
         makeNativeMethod("sendArray", JFlipperConnectionImpl::sendArray),
+        makeNativeMethod("sendString", JFlipperConnectionImpl::sendString),
         makeNativeMethod("reportError", JFlipperConnectionImpl::reportError),
         makeNativeMethod(
             "reportErrorWithMetadata",
@@ -522,6 +523,10 @@ class JFlipperConnectionImpl
     });
   }
 
+  void sendString(const std::string method, const std::string params) {
+    _connection->send(std::move(method), std::move(params));
+  }
+
   void sendObject(
       const std::string method,
       jni::alias_ref<JFlipperObject> json) {
diff --git a/android/src/main/java/com/facebook/flipper/android/FlipperConnectionImpl.java b/android/src/main/java/com/facebook/flipper/android/FlipperConnectionImpl.java
index d804771d8..7dbb86667 100644
--- a/android/src/main/java/com/facebook/flipper/android/FlipperConnectionImpl.java
+++ b/android/src/main/java/com/facebook/flipper/android/FlipperConnectionImpl.java
@@ -40,10 +40,17 @@ class FlipperConnectionImpl implements FlipperConnection {
     sendArray(method, params);
   }
 
+  @Override
+  public void send(String method, String params) {
+    sendString(method, params);
+  }
+
   public native void sendObject(String method, FlipperObject params);
 
   public native void sendArray(String method, FlipperArray params);
 
+  public native void sendString(String method, String params);
+
   @Override
   public native void reportErrorWithMetadata(String reason, String stackTrace);
 
diff --git a/android/src/main/java/com/facebook/flipper/core/FlipperConnection.java b/android/src/main/java/com/facebook/flipper/core/FlipperConnection.java
index c8db6c9b3..ef48bfeb0 100644
--- a/android/src/main/java/com/facebook/flipper/core/FlipperConnection.java
+++ b/android/src/main/java/com/facebook/flipper/core/FlipperConnection.java
@@ -26,6 +26,12 @@ public interface FlipperConnection {
    */
   void send(String method, FlipperArray params);
 
+  /**
+   * Call a remote method on the Flipper desktop application, passing an optional JSON string as a
+   * parameter.
+   */
+  void send(String method, String message);
+
   /** Report client error with reason and stacktrace as an argument */
   void reportErrorWithMetadata(String reason, String stackTrace);
 
diff --git a/android/src/main/java/com/facebook/flipper/testing/FlipperConnectionMock.java b/android/src/main/java/com/facebook/flipper/testing/FlipperConnectionMock.java
index cf31a4912..3ae3d17d5 100644
--- a/android/src/main/java/com/facebook/flipper/testing/FlipperConnectionMock.java
+++ b/android/src/main/java/com/facebook/flipper/testing/FlipperConnectionMock.java
@@ -47,6 +47,19 @@ public class FlipperConnectionMock implements FlipperConnection {
     paramList.add(params);
   }
 
+  @Override
+  public void send(String method, String params) {
+    final List<Object> paramList;
+    if (sent.containsKey(method)) {
+      paramList = sent.get(method);
+    } else {
+      paramList = new ArrayList<>();
+      sent.put(method, paramList);
+    }
+
+    paramList.add(params);
+  }
+
   @Override
   public void reportErrorWithMetadata(String reason, String stackTrace) {
     errors.add(new Throwable(reason));
diff --git a/xplat/Flipper/FlipperConnection.h b/xplat/Flipper/FlipperConnection.h
index 974032b7b..12cd22f46 100644
--- a/xplat/Flipper/FlipperConnection.h
+++ b/xplat/Flipper/FlipperConnection.h
@@ -27,12 +27,19 @@ class FlipperConnection {
   virtual ~FlipperConnection() {}
 
   /**
-  Invoke a method on the Flipper desktop plugin with with a matching identifier.
+  Invoke a method on the Flipper desktop plugin with a matching identifier.
   */
   virtual void send(
       const std::string& method,
       const folly::dynamic& params) = 0;
 
+  /**
+   Invoke a method on the Flipper desktop plugin with a matching
+   identifier.
+   Note: The `message` argument is expected to contain a valid JSON.
+   */
+  virtual void send(const std::string& method, const std::string& params) = 0;
+
   /**
   Report an error to the Flipper desktop app
   */
diff --git a/xplat/Flipper/FlipperConnectionImpl.h b/xplat/Flipper/FlipperConnectionImpl.h
index e9578480f..e0b646ae7 100644
--- a/xplat/Flipper/FlipperConnectionImpl.h
+++ b/xplat/Flipper/FlipperConnectionImpl.h
@@ -8,6 +8,7 @@
 #pragma once
 
 #include <map>
+#include <sstream>
 #include <string>
 #include "FlipperConnection.h"
 #include "FlipperConnectionManager.h"
@@ -52,6 +53,23 @@ class FlipperConnectionImpl : public FlipperConnection {
     socket_->sendMessage(message);
   }
 
+  void send(const std::string& method, const std::string& params) override {
+    std::stringstream ss;
+    ss << "{"
+          "\"method\": \"execute\","
+          "\"params\": {"
+          "\"api\": \""
+       << name_
+       << "\","
+          "\"method\": \""
+       << method
+       << "\","
+          "\"params\":"
+       << params << "}}";
+
+    socket_->sendMessage(ss.str());
+  }
+
   void error(const std::string& message, const std::string& stacktrace)
       override {
     socket_->sendMessage(folly::dynamic::object(
diff --git a/xplat/Flipper/FlipperConnectionManager.h b/xplat/Flipper/FlipperConnectionManager.h
index cb9bd97f8..1387791ff 100644
--- a/xplat/Flipper/FlipperConnectionManager.h
+++ b/xplat/Flipper/FlipperConnectionManager.h
@@ -54,6 +54,12 @@ class FlipperConnectionManager {
    */
   virtual void sendMessage(const folly::dynamic& message) = 0;
 
+  /**
+   Send message to the ws server.
+   Note: The `message` argument is expected to contain a valid JSON.
+   */
+  virtual void sendMessage(const std::string& message) = 0;
+
   /**
    Handler for connection and message receipt from the ws server.
    The callbacks should be set before a connection is established.
diff --git a/xplat/Flipper/FlipperConnectionManagerImpl.cpp b/xplat/Flipper/FlipperConnectionManagerImpl.cpp
index eee230582..10d5537c0 100644
--- a/xplat/Flipper/FlipperConnectionManagerImpl.cpp
+++ b/xplat/Flipper/FlipperConnectionManagerImpl.cpp
@@ -341,6 +341,20 @@ void FlipperConnectionManagerImpl::sendMessage(const folly::dynamic& message) {
   });
 }
 
+void FlipperConnectionManagerImpl::sendMessage(const std::string& message) {
+  flipperScheduler_->schedule([this, message]() {
+    try {
+      if (client_) {
+        client_->send(message, []() {});
+      }
+    } catch (std::length_error& e) {
+      // Skip sending messages that are too large.
+      log(e.what());
+      return;
+    }
+  });
+}
+
 void FlipperConnectionManagerImpl::onMessageReceived(
     const folly::dynamic& message,
     std::unique_ptr<FlipperResponder> responder) {
diff --git a/xplat/Flipper/FlipperConnectionManagerImpl.h b/xplat/Flipper/FlipperConnectionManagerImpl.h
index e1653dee1..3a586130b 100644
--- a/xplat/Flipper/FlipperConnectionManagerImpl.h
+++ b/xplat/Flipper/FlipperConnectionManagerImpl.h
@@ -42,6 +42,8 @@ class FlipperConnectionManagerImpl : public FlipperConnectionManager {
 
   void sendMessage(const folly::dynamic& message) override;
 
+  void sendMessage(const std::string& message) override;
+
   void onMessageReceived(
       const folly::dynamic& message,
       std::unique_ptr<FlipperResponder> responder) override;
diff --git a/xplat/FlipperTestLib/FlipperConnectionManagerMock.h b/xplat/FlipperTestLib/FlipperConnectionManagerMock.h
index ca365be58..51f57ba92 100644
--- a/xplat/FlipperTestLib/FlipperConnectionManagerMock.h
+++ b/xplat/FlipperTestLib/FlipperConnectionManagerMock.h
@@ -40,6 +40,10 @@ class FlipperConnectionManagerMock : public FlipperConnectionManager {
     messages.push_back(message);
   }
 
+  void sendMessage(const std::string& message) override {
+    messages.push_back(folly::parseJson(message));
+  }
+
   void setCertificateProvider(
       const std::shared_ptr<FlipperCertificateProvider> provider) override{};
 
diff --git a/xplat/FlipperTestLib/FlipperConnectionMock.h b/xplat/FlipperTestLib/FlipperConnectionMock.h
index 93d83a6cd..d662bf290 100644
--- a/xplat/FlipperTestLib/FlipperConnectionMock.h
+++ b/xplat/FlipperTestLib/FlipperConnectionMock.h
@@ -8,6 +8,7 @@
 #pragma once
 
 #include <Flipper/FlipperConnection.h>
+#include <folly/json.h>
 #include <map>
 #include <queue>
 #include <string>
@@ -22,6 +23,11 @@ class FlipperConnectionMock : public FlipperConnection {
     sent_message_history[method].push(params);
   }
 
+  void send(const std::string& method, const std::string& params) override {
+    sent_[method] = folly::parseJson(params);
+    sent_message_history[method].push(params);
+  }
+
   void receive(const std::string& method, const FlipperReceiver& receiver)
       override {
     receivers_[method] = receiver;