diff --git a/Cpp/Executables/Main/Nymph.cc b/Cpp/Executables/Main/Nymph.cc
index ac2b460..014fcf1 100644
--- a/Cpp/Executables/Main/Nymph.cc
+++ b/Cpp/Executables/Main/Nymph.cc
@@ -63,21 +63,28 @@ int main( int argc, char** argv )
     // Start handling signals
     scarab::signal_handler t_sig_hand;
 
+    int the_return = -1;
+
     // Create the application
     scarab::main_app the_main;
+    //Runs RunNymph() and sets  the_return based on its return value
+    auto t_callback = [&](){
+        // If any subcommands were called, we don't execute the main callback
+        if( the_main.get_subcommands().size() > 0 ) return;
+        the_return = Nymph::RunNymph( the_main.primary_config() );
+    };
+    the_main.callback( t_callback );
+
+    // Checks for the existence of a processor type and lists processors
+    scarab::config_decorator* t_proc_check = the_main.add_config_subcommand( "proc-check", "Check if a processor type is known" );
+    t_proc_check->this_app()->callback( [&](){ the_return = Nymph::ProcessorCheck(the_main.primary_config()); } );
 
+    the_main.require_subcommand(0, 1);
     the_main.set_global_verbosity(scarab::logger::ELevel::eDebug);
 
     // add the typical CL options
     Nymph::AddRunNymphOptions( the_main );
-
-    //Runs RunNymph() and sets  the_return based on its return value
-    int the_return = -1;
-    auto t_callback = [&](){
-        the_return = Nymph::RunNymph(  the_main.primary_config() );
-    };
-
-    the_main.callback( t_callback );
+    Nymph::AddProcessorCheckOptions( t_proc_check );
 
     // Parse CL options and run the application
     CLI11_PARSE( the_main, argc, argv );
diff --git a/Cpp/Library/Implementation/RunNymph.cc b/Cpp/Library/Implementation/RunNymph.cc
index 3521d24..21196b9 100644
--- a/Cpp/Library/Implementation/RunNymph.cc
+++ b/Cpp/Library/Implementation/RunNymph.cc
@@ -69,4 +69,49 @@ namespace Nymph
         // options
         an_app.add_config_flag< bool >( "--dry-run", "dry-run", "Load the config, setup processors, but do not execute the run" );
     }
+
+    int ProcessorCheck( scarab::param_node& a_config )
+    {
+        ProcessorToolbox tb;
+        
+        LWARN( nlog, a_config );
+
+        if( a_config.has( "list-procs" ) && a_config["list-procs"]().as_bool() )
+        {
+            using factory_type = const scarab::factory< Processor, const std::string& >;
+            factory_type* t_factory = tb.ProcFactory();
+            std::stringstream t_list_ss;
+            for( auto it = t_factory->begin(); it != t_factory->end(); ++it )
+            {
+                t_list_ss << it->first << '\n';
+
+            }
+            LPROG( nlog, "Available processors:\n" << t_list_ss.str() );
+            return RETURN_SUCCESS;
+        }
+        else
+        {
+            if( ! a_config.has( "proc-type" ) || a_config["proc-type"]().as_string().empty() )
+            {
+                LERROR( nlog, "No processor type was provided to check" );
+                return RETURN_ERROR;
+            }
+            std::string t_proc_type( a_config["proc-type"]().as_string() );
+            bool t_proc_is_available = tb.CouldBuild( t_proc_type );
+            if( ! t_proc_is_available )
+            {
+                LWARN( nlog, "Processor <" << t_proc_type << "> is NOT registered with the processor toolbox" );
+                return -1;
+            }
+            LPROG( nlog, "Processor <" << t_proc_type << "> is known to the processor toolbox" );
+            return RETURN_SUCCESS;
+        }
+    }
+
+    void AddProcessorCheckOptions( scarab::config_decorator* a_subcommand )
+    {
+        // options
+        a_subcommand->add_config_option< std::string >( "proc-type", "proc-type", "Query Nymph to see if this processor type has been registered; returns 0 if present; -1 if not present" );
+        a_subcommand->add_config_flag< bool >( "-l,--list-procs", "list-procs", "List available processors" );
+    }
 }
diff --git a/Cpp/Library/Implementation/RunNymph.hh b/Cpp/Library/Implementation/RunNymph.hh
index aba61f4..9a6ad01 100644
--- a/Cpp/Library/Implementation/RunNymph.hh
+++ b/Cpp/Library/Implementation/RunNymph.hh
@@ -10,6 +10,7 @@
 
 namespace scarab
 {
+    class config_decorator;
     class main_app;
     class param_node;
 }
@@ -17,8 +18,10 @@ namespace scarab
 namespace Nymph
 {
     int RunNymph( scarab::param_node& config );
-
     void AddRunNymphOptions( scarab::main_app& an_app );
+
+    int ProcessorCheck( scarab::param_node& config );
+    void AddProcessorCheckOptions( scarab::config_decorator* an_app );
 }
 
 
diff --git a/Cpp/Library/Processor/ProcessorToolbox.hh b/Cpp/Library/Processor/ProcessorToolbox.hh
index c51283c..76ac86e 100644
--- a/Cpp/Library/Processor/ProcessorToolbox.hh
+++ b/Cpp/Library/Processor/ProcessorToolbox.hh
@@ -118,6 +118,8 @@ namespace Nymph
             /// Also clears the run queue
             void ClearProcessors();
 
+            const scarab::factory< Processor, const std::string& >* ProcFactory() const;
+
         protected:
             ProcessorMap fProcMap;
 
@@ -177,5 +179,10 @@ namespace Nymph
         return MakeConnection(signalProcName, signalName, slotProcName, slotName, std::numeric_limits< int >::min()); 
     }
 
+    inline const scarab::factory< Processor, const std::string& >* ProcessorToolbox::ProcFactory() const
+    {
+        return fProcFactory;
+    }
+
 } /* namespace Nymph */
 #endif /* NYMPH_PROCESSORTOOLBOX_HH_ */
diff --git a/Scarab b/Scarab
index b899601..cb559e0 160000
--- a/Scarab
+++ b/Scarab
@@ -1 +1 @@
-Subproject commit b899601d9c5f6a81734b6bd78f3056a1bf52b708
+Subproject commit cb559e090c950f56a6ddb12d1ae1f10a338440e7