diff --git a/include/ircd/spirit/parse.h b/include/ircd/spirit/parse.h
index 35c2f38cd..67db6fdd2 100644
--- a/include/ircd/spirit/parse.h
+++ b/include/ircd/spirit/parse.h
@@ -16,8 +16,11 @@ namespace spirit
 __attribute__((visibility("internal")))
 {
 	struct substring_view;
-	struct custom_parser;
-	BOOST_SPIRIT_TERMINAL(custom);
+
+	template<size_t id> struct custom_parser;
+	BOOST_SPIRIT_TERMINAL(custom0);
+	BOOST_SPIRIT_TERMINAL(custom1);
+	BOOST_SPIRIT_TERMINAL(custom2);
 
 	template<class gen,
 	         class... attr>
@@ -37,18 +40,35 @@ __attribute__((visibility("internal")))
 	namespace qi
 	{
 		template<class modifiers>
-		struct make_primitive<ircd::spirit::tag::custom, modifiers>;
+		struct make_primitive<ircd::spirit::tag::custom0, modifiers>;
+
+		template<class modifiers>
+		struct make_primitive<ircd::spirit::tag::custom1, modifiers>;
+
+		template<class modifiers>
+		struct make_primitive<ircd::spirit::tag::custom2, modifiers>;
 	}
 
 	template<>
-	struct use_terminal<qi::domain, ircd::spirit::tag::custom>
+	struct use_terminal<qi::domain, ircd::spirit::tag::custom0>
+	:mpl::true_
+	{};
+
+	template<>
+	struct use_terminal<qi::domain, ircd::spirit::tag::custom1>
+	:mpl::true_
+	{};
+
+	template<>
+	struct use_terminal<qi::domain, ircd::spirit::tag::custom2>
 	:mpl::true_
 	{};
 }}
 
+template<size_t id>
 struct [[gnu::visibility("internal")]]
 ircd::spirit::custom_parser
-:qi::primitive_parser<custom_parser>
+:qi::primitive_parser<custom_parser<id>>
 {
 	template<class context,
 	         class iterator>
@@ -72,9 +92,33 @@ ircd::spirit::custom_parser
 
 template<class modifiers>
 struct [[gnu::visibility("internal")]]
-boost::spirit::qi::make_primitive<ircd::spirit::tag::custom, modifiers>
+boost::spirit::qi::make_primitive<ircd::spirit::tag::custom0, modifiers>
 {
-	using result_type = ircd::spirit::custom_parser;
+	using result_type = ircd::spirit::custom_parser<0>;
+
+	result_type operator()(unused_type, unused_type) const
+	{
+		return result_type{};
+	}
+};
+
+template<class modifiers>
+struct [[gnu::visibility("internal")]]
+boost::spirit::qi::make_primitive<ircd::spirit::tag::custom1, modifiers>
+{
+	using result_type = ircd::spirit::custom_parser<1>;
+
+	result_type operator()(unused_type, unused_type) const
+	{
+		return result_type{};
+	}
+};
+
+template<class modifiers>
+struct [[gnu::visibility("internal")]]
+boost::spirit::qi::make_primitive<ircd::spirit::tag::custom2, modifiers>
+{
+	using result_type = ircd::spirit::custom_parser<2>;
 
 	result_type operator()(unused_type, unused_type) const
 	{
diff --git a/ircd/json.cc b/ircd/json.cc
index 164da8f4e..17aa2b94c 100644
--- a/ircd/json.cc
+++ b/ircd/json.cc
@@ -164,7 +164,7 @@ ircd::json::parser
 	};
 
 	template<class block_t> static u64x2 string_content_block(const block_t, const block_t) noexcept;
-	const custom_parser string_content{};
+	const custom_parser<0> string_content{};
 	const rule<string_view> string
 	{
 		//quote >> chars >> (!escape >> quote)
@@ -474,16 +474,17 @@ const
 /// to the end of whatever the user provided. Returns true if successful and
 /// the result string_view is set in the context attribute; the iterator is
 /// advanced.
+template<>
 template<class iterator,
          class context,
          class skipper,
          class attr>
 inline bool
-ircd::json::custom_parser::parse(iterator &__restrict__ start,
-                                 const iterator &__restrict__ stop,
-                                 context &g,
-                                 const skipper &,
-                                 attr &)
+ircd::json::custom_parser<0>::parse(iterator &__restrict__ start,
+                                    const iterator &__restrict__ stop,
+                                    context &g,
+                                    const skipper &,
+                                    attr &)
 const
 {
 	// Clang scales between 128bit and 256bit systems when we use the 256 bit