diff --git a/include/ircd/m/v1/invite.h b/include/ircd/m/v1/invite.h
new file mode 100644
index 000000000..76da2604d
--- /dev/null
+++ b/include/ircd/m/v1/invite.h
@@ -0,0 +1,40 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2018 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_V1_INVITE_H
+
+namespace ircd::m::v1
+{
+	struct invite;
+};
+
+struct ircd::m::v1::invite
+:server::request
+{
+	struct opts;
+
+	explicit operator json::array() const
+	{
+		return json::array{in.content};
+	}
+
+	invite(const room::id &, const id::event &, const json::object &, const mutable_buffer &, opts);
+	invite() = default;
+};
+
+struct ircd::m::v1::invite::opts
+{
+	net::hostport remote;
+	m::request request;
+	server::out out;
+	server::in in;
+	const struct server::request::opts *sopts {nullptr};
+};
diff --git a/include/ircd/m/v1/v1.h b/include/ircd/m/v1/v1.h
index 82a1e5433..5867035f9 100644
--- a/include/ircd/m/v1/v1.h
+++ b/include/ircd/m/v1/v1.h
@@ -16,6 +16,7 @@
 #include "user.h"
 #include "make_join.h"
 #include "send_join.h"
+#include "invite.h"
 #include "event.h"
 #include "state.h"
 #include "backfill.h"
diff --git a/ircd/m/v1.cc b/ircd/m/v1.cc
index 23c7ab388..eaf2f9cc1 100644
--- a/ircd/m/v1.cc
+++ b/ircd/m/v1.cc
@@ -407,6 +407,66 @@ ircd::m::v1::event::event(const m::event::id &event_id,
 {
 }
 
+///////////////////////////////////////////////////////////////////////////////
+//
+// v1/invite.h
+//
+
+ircd::m::v1::invite::invite(const room::id &room_id,
+                            const id::event &event_id,
+                            const json::object &content,
+                            const mutable_buffer &buf,
+                            opts opts)
+:server::request{[&]
+{
+	assert(!!opts.remote);
+
+	assert(!size(opts.out.content));
+	opts.out.content = content;
+
+	assert(!defined(json::get<"content"_>(opts.request)));
+	json::get<"content"_>(opts.request) = json::object{opts.out.content};
+
+	if(!defined(json::get<"origin"_>(opts.request)))
+		json::get<"origin"_>(opts.request) = my_host();
+
+	if(!defined(json::get<"destination"_>(opts.request)))
+		json::get<"destination"_>(opts.request) = host(opts.remote);
+
+	if(!defined(json::get<"uri"_>(opts.request)))
+	{
+		thread_local char urlbuf[2048], ridbuf[768], eidbuf[768];
+		json::get<"uri"_>(opts.request) = fmt::sprintf
+		{
+			urlbuf, "/_matrix/federation/v1/invite/%s/%s",
+			url::encode(room_id, ridbuf),
+			url::encode(event_id, eidbuf)
+		};
+	}
+
+	json::get<"method"_>(opts.request) = "PUT";
+	opts.out.head = opts.request(buf);
+
+	if(!size(opts.in))
+	{
+		const auto in_max
+		{
+			std::max(ssize_t(size(buf) - size(opts.out.head)), ssize_t(0))
+		};
+
+		assert(in_max >= ssize_t(size(buf) / 2));
+		opts.in.head = { data(buf) + size(opts.out.head), size_t(in_max) };
+		opts.in.content = mutable_buffer{};
+	}
+
+	return server::request
+	{
+		opts.remote, std::move(opts.out), std::move(opts.in), opts.sopts
+	};
+}()}
+{
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 // v1/send_join.h