diff --git a/lldb/bindings/interface/SBCommandInterpreter.i b/lldb/bindings/interface/SBCommandInterpreter.i
--- a/lldb/bindings/interface/SBCommandInterpreter.i
+++ b/lldb/bindings/interface/SBCommandInterpreter.i
@@ -169,6 +169,9 @@
     bool
     CommandExists (const char *cmd);
 
+    bool
+    UserCommandExists (const char *cmd);
+
     bool
     AliasExists (const char *cmd);
 
diff --git a/lldb/include/lldb/API/SBCommandInterpreter.h b/lldb/include/lldb/API/SBCommandInterpreter.h
--- a/lldb/include/lldb/API/SBCommandInterpreter.h
+++ b/lldb/include/lldb/API/SBCommandInterpreter.h
@@ -91,8 +91,28 @@
 
   bool IsValid() const;
 
+  /// Determine whether a command exists in this CommandInterpreter.
+  ///
+  /// For commands registered using the LLDB API, see UserCommandExists
+  ///
+  /// \param[in] cmd
+  ///     The command to look up.
+  ///
+  /// \return
+  ///     \b true if the provided command exists, \b false otherwise.
   bool CommandExists(const char *cmd);
 
+  /// Determine whether a user command exists in this CommandInterpreter.
+  /// Users commands are the ones registered using the LLDB API and are not
+  /// provided by default in LLDB.
+  ///
+  /// \param[in] cmd
+  ///     The command to look up.
+  ///
+  /// \return
+  ///     \b true if the provided command exists, \b false otherwise.
+  bool UserCommandExists(const char *cmd);
+
   bool AliasExists(const char *cmd);
 
   lldb::SBBroadcaster GetBroadcaster();
diff --git a/lldb/source/API/SBCommandInterpreter.cpp b/lldb/source/API/SBCommandInterpreter.cpp
--- a/lldb/source/API/SBCommandInterpreter.cpp
+++ b/lldb/source/API/SBCommandInterpreter.cpp
@@ -216,6 +216,14 @@
                                           : false);
 }
 
+bool SBCommandInterpreter::UserCommandExists(const char *cmd) {
+  LLDB_RECORD_METHOD(bool, SBCommandInterpreter, UserCommandExists,
+                     (const char *), cmd);
+
+  return (((cmd != nullptr) && IsValid()) ? m_opaque_ptr->UserCommandExists(cmd)
+                                          : false);
+}
+
 bool SBCommandInterpreter::AliasExists(const char *cmd) {
   LLDB_RECORD_METHOD(bool, SBCommandInterpreter, AliasExists, (const char *),
                      cmd);
@@ -874,6 +882,8 @@
   LLDB_REGISTER_METHOD_CONST(bool, SBCommandInterpreter, operator bool, ());
   LLDB_REGISTER_METHOD(bool, SBCommandInterpreter, CommandExists,
                        (const char *));
+  LLDB_REGISTER_METHOD(bool, SBCommandInterpreter, UserCommandExists,
+                       (const char *));
   LLDB_REGISTER_METHOD(bool, SBCommandInterpreter, AliasExists,
                        (const char *));
   LLDB_REGISTER_METHOD(bool, SBCommandInterpreter, IsActive, ());
diff --git a/lldb/unittests/Interpreter/CMakeLists.txt b/lldb/unittests/Interpreter/CMakeLists.txt
--- a/lldb/unittests/Interpreter/CMakeLists.txt
+++ b/lldb/unittests/Interpreter/CMakeLists.txt
@@ -1,8 +1,10 @@
 add_lldb_unittest(InterpreterTests
   TestCompletion.cpp
   TestOptionArgParser.cpp
+  TestUserCommand.cpp
 
   LINK_LIBS
+    liblldb
     lldbInterpreter
     lldbUtilityHelpers
   )
diff --git a/lldb/unittests/Interpreter/TestUserCommand.cpp b/lldb/unittests/Interpreter/TestUserCommand.cpp
new file mode 100644
--- /dev/null
+++ b/lldb/unittests/Interpreter/TestUserCommand.cpp
@@ -0,0 +1,45 @@
+//===-- TestUserCommand.cpp ----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===/
+
+#include "gtest/gtest.h"
+
+#include "lldb/API/SBCommandInterpreter.h"
+#include "lldb/API/SBCommandReturnObject.h"
+#include "lldb/API/SBDebugger.h"
+
+#include <cassert>
+#include <cstring>
+#include <string>
+
+using namespace lldb;
+
+class DummyCommand : public SBCommandPluginInterface {
+public:
+  bool DoExecute(SBDebugger dbg, char **command,
+                 SBCommandReturnObject &result) {
+    result.PutCString("It works");
+    result.SetStatus(eReturnStatusSuccessFinishResult);
+    return result.Succeeded();
+  }
+};
+
+TEST(TestUserCommand, TestSimpleCommand) {
+  SBDebugger::Initialize();
+  SBDebugger dbg = SBDebugger::Create(false /*source_init_files*/);
+  SBCommandInterpreter interp = dbg.GetCommandInterpreter();
+
+  DummyCommand command;
+  interp.AddCommand("dummy", &command, nullptr /*help*/);
+
+  EXPECT_TRUE(interp.UserCommandExists("dummy"));
+
+  SBCommandReturnObject result;
+  interp.HandleCommand("dummy", result, true /*add_to_history*/);
+  EXPECT_TRUE(result.Succeeded());
+  EXPECT_STREQ(result.GetOutput(), "It works\n");
+}