diff --git a/include/ircd/m/event/event.h b/include/ircd/m/event/event.h
index 2a407a00e..3c1bd0253 100644
--- a/include/ircd/m/event/event.h
+++ b/include/ircd/m/event/event.h
@@ -18,10 +18,6 @@ namespace ircd::m
 	// General util
 	bool my(const id::event &);
 	bool my(const event &);
-	size_t degree(const event &);
-	string_view membership(const event &);
-
-	// [GET]
 	bool exists(const id::event &);
 	bool exists(const id::event &, const bool &good);
 	bool cached(const id::event &);
@@ -38,6 +34,7 @@ namespace ircd::m
 	bool operator>=(const event &, const event &);
 
 	// Topological comparison
+	size_t degree(const event &);
 	bool before(const event &a, const event &b);
 
 	bool check_id(const event &) noexcept;
diff --git a/include/ircd/m/m.h b/include/ircd/m/m.h
index e92a479d6..c663003a7 100644
--- a/include/ircd/m/m.h
+++ b/include/ircd/m/m.h
@@ -57,6 +57,7 @@ namespace ircd::m
 #include "users.h"
 #include "rooms.h"
 #include "rooms_summary.h"
+#include "membership.h"
 #include "filter.h"
 #include "events.h"
 #include "node.h"
diff --git a/include/ircd/m/membership.h b/include/ircd/m/membership.h
new file mode 100644
index 000000000..01bbcbdfa
--- /dev/null
+++ b/include/ircd/m/membership.h
@@ -0,0 +1,32 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+#pragma once
+#define HAVE_IRCD_M_MEMBERSHIP_H
+
+namespace ircd::m
+{
+	// Extract membership string from event data.
+	string_view membership(const event &);
+
+	// Query and copy membership string to buffer. Note that the event type
+	// is not checked here, only content.membership is sought.
+	string_view membership(const mutable_buffer &out, const event::idx &);
+
+	// Query and compare membership string to argument string. Returns
+	// true on equal; false on not equal; false on not found.
+	bool membership(const event::idx &, const string_view &);
+
+	// Query and copy membership string to buffer; queries room state. (also room.h)
+	string_view membership(const mutable_buffer &out, const room &, const id::user &);
+
+	// Query and compare membership string; queries room state. (also room.h)
+	bool membership(const room &, const id::user &, const string_view &);
+}
diff --git a/include/ircd/m/room/members.h b/include/ircd/m/room/members.h
index 1ab2e2c31..f60ae18ec 100644
--- a/include/ircd/m/room/members.h
+++ b/include/ircd/m/room/members.h
@@ -21,9 +21,6 @@ struct ircd::m::room::members
 	using closure_idx = std::function<bool (const id::user &, const event::idx &)>;
 	using closure = std::function<bool (const id::user &)>;
 
-	static string_view membership(const mutable_buffer &out, const event::idx &);
-	static bool membership(const event::idx &, const string_view &);
-
 	m::room room;
 
 	bool for_each_join_present(const string_view &host, const closure &) const;
diff --git a/ircd/m.cc b/ircd/m.cc
index 4997b8bb7..b97c92dba 100644
--- a/ircd/m.cc
+++ b/ircd/m.cc
@@ -2318,6 +2318,106 @@ ircd::m::event_filter::event_filter(const mutable_buffer &buf,
 {
 }
 
+///////////////////////////////////////////////////////////////////////////////
+//
+// m/membership.h
+//
+
+bool
+ircd::m::membership(const room &room,
+                    const user::id &user_id,
+                    const string_view &membership)
+{
+	const room::state state
+	{
+		room
+	};
+
+	const auto event_idx
+	{
+		state.get(std::nothrow, "m.room.member", user_id)
+	};
+
+	return m::membership(event_idx, membership);
+}
+
+ircd::string_view
+ircd::m::membership(const mutable_buffer &out,
+                    const room &room,
+                    const user::id &user_id)
+{
+	const room::state state
+	{
+		room
+	};
+
+	const auto event_idx
+	{
+		state.get(std::nothrow, "m.room.member", user_id)
+	};
+
+	return m::membership(out, event_idx);
+}
+
+bool
+ircd::m::membership(const event::idx &event_idx,
+                    const string_view &membership)
+{
+	return m::query(std::nothrow, event_idx, "content", [&membership]
+	(const json::object &content)
+	{
+		const json::string &content_membership
+		{
+			content["membership"]
+		};
+
+		return content_membership == membership;
+	});
+}
+
+ircd::string_view
+ircd::m::membership(const mutable_buffer &out,
+                    const event::idx &event_idx)
+{
+	return m::query(std::nothrow, event_idx, "content", [&out]
+	(const json::object &content) -> string_view
+	{
+		const json::string &content_membership
+		{
+			content["membership"]
+		};
+
+		return strlcpy
+		{
+			out, content_membership
+		};
+	});
+}
+
+ircd::string_view
+ircd::m::membership(const event &event)
+{
+	const json::object &content
+	{
+		json::get<"content"_>(event)
+	};
+
+	const string_view &membership
+	{
+		json::get<"membership"_>(event)
+	};
+
+	if(membership)
+		return membership;
+
+	const json::string &content_membership
+	{
+		content.get("membership")
+	};
+
+	return content_membership;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 // m/user.h
diff --git a/ircd/m_event.cc b/ircd/m_event.cc
index c0b45a1d7..7db5dff52 100644
--- a/ircd/m_event.cc
+++ b/ircd/m_event.cc
@@ -3099,6 +3099,25 @@ ircd::m::before(const event &a,
 	return prev.prev_events_has(a.event_id);
 }
 
+size_t
+ircd::m::degree(const event &event)
+{
+	return degree(event::prev{event});
+}
+
+size_t
+ircd::m::degree(const event::prev &prev)
+{
+	size_t ret{0};
+	json::for_each(prev, [&ret]
+	(const auto &, const json::array &prevs)
+	{
+		ret += prevs.count();
+	});
+
+	return ret;
+}
+
 bool
 ircd::m::operator>=(const event &a, const event &b)
 {
@@ -3186,49 +3205,6 @@ ircd::m::exists(const id::event &event_id)
 	return bool(event_id) && has(column, event_id);
 }
 
-ircd::string_view
-ircd::m::membership(const event &event)
-{
-	const json::object &content
-	{
-		json::get<"content"_>(event)
-	};
-
-	const string_view &membership
-	{
-		json::get<"membership"_>(event)
-	};
-
-	if(membership)
-		return membership;
-
-	const json::string &content_membership
-	{
-		content.get("membership")
-	};
-
-	return content_membership;
-}
-
-size_t
-ircd::m::degree(const event &event)
-{
-	return degree(event::prev{event});
-}
-
-size_t
-ircd::m::degree(const event::prev &prev)
-{
-	size_t ret{0};
-	json::for_each(prev, [&ret]
-	(const auto &, const json::array &prevs)
-	{
-		ret += prevs.count();
-	});
-
-	return ret;
-}
-
 bool
 ircd::m::my(const event &event)
 {
diff --git a/ircd/m_room.cc b/ircd/m_room.cc
index 1094929e6..619dc9a76 100644
--- a/ircd/m_room.cc
+++ b/ircd/m_room.cc
@@ -891,24 +891,6 @@ ircd::m::any_user(const room &room,
 	return ret;
 }
 
-ircd::string_view
-ircd::m::membership(const mutable_buffer &out,
-                    const room &room,
-                    const user::id &user_id)
-{
-	const room::state state
-	{
-		room
-	};
-
-	const auto event_idx
-	{
-		state.get(std::nothrow, "m.room.member", user_id)
-	};
-
-	return room::members::membership(out, event_idx);
-}
-
 /// Receive the join_rule of the room into buffer of sufficient size.
 /// The protocol does not specify a join_rule string longer than 7
 /// characters but do be considerate of the future. This function
@@ -1161,24 +1143,6 @@ ircd::m::join_rule(const room &room,
 	return join_rule(buf, room) == rule;
 }
 
-bool
-ircd::m::membership(const room &room,
-                    const user::id &user_id,
-                    const string_view &membership)
-{
-	const room::state state
-	{
-		room
-	};
-
-	const auto event_idx
-	{
-		state.get(std::nothrow, "m.room.member", user_id)
-	};
-
-	return room::members::membership(event_idx, membership);
-}
-
 bool
 ircd::m::creator(const room::id &room_id,
                  const user::id &user_id)
@@ -3188,7 +3152,7 @@ const
 		if(host && user_id.host() != host)
 			return true;
 
-		return !membership || this->membership(event_idx, membership)?
+		return !membership || m::membership(event_idx, membership)?
 			closure(user_id, event_idx):
 			true;
 	});
@@ -3232,41 +3196,6 @@ const
 	return true;
 }
 
-bool
-ircd::m::room::members::membership(const event::idx &event_idx,
-                                   const string_view &membership)
-{
-	return m::query(std::nothrow, event_idx, "content", [&membership]
-	(const json::object &content)
-	{
-		const json::string &content_membership
-		{
-			content["membership"]
-		};
-
-		return content_membership && content_membership == membership;
-	});
-}
-
-ircd::string_view
-ircd::m::room::members::membership(const mutable_buffer &out,
-                                   const event::idx &event_idx)
-{
-	return m::query(std::nothrow, event_idx, "content", [&out]
-	(const json::object &content) -> string_view
-	{
-		const json::string &content_membership
-		{
-			content["membership"]
-		};
-
-		return strlcpy
-		{
-			out, content_membership
-		};
-	});
-}
-
 //
 // room::origins
 //
diff --git a/modules/client/rooms/members.cc b/modules/client/rooms/members.cc
index 5d70f35f6..127a719ea 100644
--- a/modules/client/rooms/members.cc
+++ b/modules/client/rooms/members.cc
@@ -102,7 +102,7 @@ get__members(client &client,
 	members.for_each(membership, [&not_membership]
 	(const m::user::id &member, const m::event::idx &event_idx)
 	{
-		if(m::room::members::membership(event_idx, not_membership))
+		if(m::membership(event_idx, not_membership))
 			return true;
 
 		m::prefetch(event_idx);
@@ -112,7 +112,7 @@ get__members(client &client,
 	members.for_each(membership, [&request, &chunk, &not_membership]
 	(const m::user::id &member, const m::event::idx &event_idx)
 	{
-		if(m::room::members::membership(event_idx, not_membership))
+		if(m::membership(event_idx, not_membership))
 			return true;
 
 		const m::event::fetch event
diff --git a/modules/console.cc b/modules/console.cc
index 18bf348f0..7fc5fb030 100644
--- a/modules/console.cc
+++ b/modules/console.cc
@@ -8701,7 +8701,7 @@ console_cmd__room__members(opt &out, const string_view &line)
 	(const m::user::id &user_id, const m::event::idx &event_idx)
 	{
 		char buf[32];
-		out << std::setw(8) << std::left << m::room::members::membership(buf, event_idx)
+		out << std::setw(8) << std::left << m::membership(buf, event_idx)
 		    << " " << user_id << std::endl;
 
 		return true;
diff --git a/modules/m_room_bootstrap.cc b/modules/m_room_bootstrap.cc
index 7b6b6de3c..9008fe266 100644
--- a/modules/m_room_bootstrap.cc
+++ b/modules/m_room_bootstrap.cc
@@ -108,8 +108,7 @@ ircd::m::room::bootstrap::bootstrap(m::event::id::buf &event_id_buf,
 
 	const bool existing_join
 	{
-		member_event_idx &&
-		m::room::members::membership(member_event_idx, "join")
+		m::membership(member_event_idx, "join")
 	};
 
 	if(existing_join)