diff --git a/type/__matrix_alertmanager_receiver/files/matrix-alertmanager-receiver.toml.sh b/type/__matrix_alertmanager_receiver/files/matrix-alertmanager-receiver.toml.sh
new file mode 100755
index 0000000..821b6fb
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/files/matrix-alertmanager-receiver.toml.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+cat << EOF
+Homeserver = "${HOMESERVER:?}"
+TargetRoomID = "${ROOM_ID:?}"
+MXID = "${USER_ID:?}"
+MXToken = "${USER_TOKEN:?}"
+HTTPPort = ${LISTENING_PORT:?}
+HTTPAddress = "${LISTENING_HOST:?}"
+EOF
diff --git a/type/__matrix_alertmanager_receiver/files/openrc-unit b/type/__matrix_alertmanager_receiver/files/openrc-unit
new file mode 100644
index 0000000..8f5a9b6
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/files/openrc-unit
@@ -0,0 +1,7 @@
+#!/sbin/openrc-run
+name="matrix-alertmanager-receiver"
+description="Forwards Prometheus Alerts to a Matrix room"
+command=/usr/local/bin/matrix-alertmanager-receiver
+command_background=true
+command_user="prometheus:prometheus"
+pidfile=/run/matrix-alertmanager-receiver.pid
diff --git a/type/__matrix_alertmanager_receiver/files/systemd-unit b/type/__matrix_alertmanager_receiver/files/systemd-unit
new file mode 100644
index 0000000..43e317c
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/files/systemd-unit
@@ -0,0 +1,11 @@
+[Unit]
+Description=Sends Prometheus Alerts to a Matrix room
+After=network.target
+
+[Service]
+Type=simple
+User=prometheus
+ExecStart=/usr/local/bin/matrix-alertmanager-receiver
+
+[Install]
+WantedBy=multi-user.target
diff --git a/type/__matrix_alertmanager_receiver/gencode-remote b/type/__matrix_alertmanager_receiver/gencode-remote
new file mode 100644
index 0000000..45c299a
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/gencode-remote
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+UPSTREAM=https://git.sr.ht/~fnux/matrix-alertmanager-receiver
+VERSION=0.1.1
+
+# Fetch, build and install binary.
+cat << EOF
+if ! command -v matrix-alertmanager-receiver; then
+	workdir=\$(mktemp -d)
+	cd \$workdir
+
+	# Fetch source archive.
+	curl "$UPSTREAM/archive/$VERSION.tar.gz" -o "$VERSION.tar.gz"
+	tar xf "$VERSION.tar.gz"
+	cd "matrix-alertmanager-receiver-$VERSION"
+
+	# Build binary.
+	go build -v
+
+	# Install binary.
+	install -m 0755 matrix-alertmanager-receiver /usr/local/bin/
+
+	# Cleanup build directory.
+	rm -r \$workdir
+
+	# Start service.
+	service matrix-alertmanager-receiver start
+fi
+EOF
+
+if grep -q "^__file/etc/matrix-alertmanager-receiver.toml:" "${__messages_in:?}"; then
+	echo "service matrix-alertmanager-receiver restart"
+fi
diff --git a/type/__matrix_alertmanager_receiver/man.rst b/type/__matrix_alertmanager_receiver/man.rst
new file mode 100644
index 0000000..5157a20
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/man.rst
@@ -0,0 +1,70 @@
+cdist-type__matrix_alertmanager_receiver(7)
+=====================
+
+NAME
+----
+cdist-type__matrix_alertmanager_receiver - Deploy a simple Prometheus Alertmanager-to-Matrix service
+
+
+DESCRIPTION
+-----------
+This (singleton) type deploys `matrix-alertmanager-receiver <https://git.sr.ht/~fnux/matrix-alertmanager-receiver>`_, a simple daemon allowing Prometheus alerts to be sent to a `Matrix <https://matrix/>`_ room.
+
+REQUIRED PARAMETERS
+-------------------
+homeserver
+  Address of the matrix homeserver to use.
+
+room-id
+  ID of the (Matrix) room receiving alerts. Note that it must be the room ID:
+  an alias won't work!
+
+user-id
+  MXID of the (Matrix) user sending alerts.
+
+user-token
+  Token of the (Matrix) user sending alerts. Can be found under
+  Settings/Advanced in the Element web client.
+
+OPTIONAL PARAMETERS
+-------------------
+host
+  Host to bind, defaults to `localhost`.
+
+port
+  Port to listen on, defaults to `9088`.
+
+BOOLEAN PARAMETERS
+------------------
+None.
+
+EXAMPLES
+--------
+
+.. code-block:: sh
+
+    __matrix_alertmanager_receiver \
+      --homeserver 'https://matrix.domain.tld/' \
+      --room-id '!patatra:domain.tld' \
+      --user-id '@alerts:domain.tls' \
+      --user-token 'secretsecretsecret' \
+      --host 'localhost' \
+      --port 9088
+
+
+SEE ALSO
+--------
+- `Upstream <https://git.sr.ht/~fnux/matrix-alertmanager-receiver>`_
+- `__prometheus_alertmanager(7)`
+
+AUTHORS
+-------
+Timothée Floure <t.floure@e-durable.ch>
+
+
+COPYING
+-------
+Copyright \(C) 2020 Timothée Floure. You can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
diff --git a/type/__matrix_alertmanager_receiver/manifest b/type/__matrix_alertmanager_receiver/manifest
new file mode 100644
index 0000000..94535d8
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/manifest
@@ -0,0 +1,65 @@
+#!/bin/sh
+
+os="$(cat "${__global:?}/explorer/os")"
+init="$(cat "${__global:?}/explorer/init")"
+
+case "$os" in
+	alpine)
+		__package go
+		__package prometheus
+		__package curl
+		;;
+	debian|ubuntu)
+		__package golang
+		__package prometheus
+		__package curl
+		;;
+	*)
+		echo "This type does not support $os. Exiting." >&2
+		exit 1
+		;;
+esac
+
+# Type parameters.
+HOMESERVER=$(cat "${__object:?}/parameter/homeserver")
+ROOM_ID=$(cat "${__object:?}/parameter/room-id")
+USER_ID=$(cat "${__object:?}/parameter/user-id")
+USER_TOKEN=$(cat "${__object:?}/parameter/user-token")
+export HOMESERVER ROOM_ID USER_ID USER_TOKEN
+
+LISTENING_HOST=$(cat "${__object:?}/parameter/host")
+LISTENING_PORT=$(cat "${__object:?}/parameter/port")
+export LISTENING_PORT LISTENING_HOST
+
+# Generate and deploy configuration
+mkdir -p "${__object:?}/files"
+"${__type:?}/files/matrix-alertmanager-receiver.toml.sh" > \
+	"${__object:?}/files/matrix-alertmanager-receiver.toml"
+
+require="__package/prometheus" __file /etc/matrix-alertmanager-receiver.toml \
+	--source "${__object:?}/files/matrix-alertmanager-receiver.toml" \
+	--owner prometheus \
+	--mode 0644
+
+case "$init" in
+	systemd)
+		unit_path='/etc/systemd/system/matrix-alertmanager-receiver.service'
+		__file "$unit_path" \
+			--source "${__type:?}/files/systemd-unit" \
+			--mode 0644
+		;;
+	busybox-init+openrc)
+		unit_path='/etc/init.d/matrix-alertmanager-receiver'
+		__file "$unit_path" \
+			--source "${__type:?}/files/openrc-unit" \
+			--owner prometheus \
+			--mode 0755
+		;;
+	*)
+		echo "Unknown init: $init" >&2
+		exit 1
+		;;
+esac
+
+require="__file/$unit_path" \
+	__start_on_boot matrix-alertmanager-receiver
diff --git a/type/__matrix_alertmanager_receiver/parameter/default/host b/type/__matrix_alertmanager_receiver/parameter/default/host
new file mode 100644
index 0000000..2fbb50c
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/parameter/default/host
@@ -0,0 +1 @@
+localhost
diff --git a/type/__matrix_alertmanager_receiver/parameter/default/port b/type/__matrix_alertmanager_receiver/parameter/default/port
new file mode 100644
index 0000000..effbdc4
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/parameter/default/port
@@ -0,0 +1 @@
+9088
diff --git a/type/__matrix_alertmanager_receiver/parameter/optional b/type/__matrix_alertmanager_receiver/parameter/optional
new file mode 100644
index 0000000..11fb32f
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/parameter/optional
@@ -0,0 +1,2 @@
+host
+port
diff --git a/type/__matrix_alertmanager_receiver/parameter/required b/type/__matrix_alertmanager_receiver/parameter/required
new file mode 100644
index 0000000..7c2c764
--- /dev/null
+++ b/type/__matrix_alertmanager_receiver/parameter/required
@@ -0,0 +1,4 @@
+homeserver
+room-id
+user-id
+user-token
diff --git a/type/__matrix_alertmanager_receiver/singleton b/type/__matrix_alertmanager_receiver/singleton
new file mode 100644
index 0000000..e69de29