diff --git a/dev-ml/x509/Manifest b/dev-ml/x509/Manifest
new file mode 100644
index 0000000000..9de5accc46
--- /dev/null
+++ b/dev-ml/x509/Manifest
@@ -0,0 +1 @@
+DIST x509-v0.13.0.tbz 143302 BLAKE2B d4079a5cce87617ea611ed5624697577b97cf69a1df830fe2b4775ffa47ab557a72cb01bf24b6b56478f6fb22afb87e971ab260ae6acd7e75ef6ad0ff4052c24 SHA512 ab6d4df7e6b6796b962d4ec3d949723c2a039fc9d534a196d8ebd71499dce310716aba3be7bd9600428b534f5eadf7b8b106f77633a63f46c16eceb447e946cc
diff --git a/dev-ml/x509/metadata.xml b/dev-ml/x509/metadata.xml
new file mode 100644
index 0000000000..973e19557b
--- /dev/null
+++ b/dev-ml/x509/metadata.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+   <maintainer type="person">
+        <description>co-maintainers welcome</description>
+        <email>lssndrbarbieri@gmail.com</email>
+        <name>Alessandro Barbieri</name>
+    </maintainer>
+   <upstream>
+        <remote-id type="github">mirleft/ocaml-x509</remote-id>
+    </upstream>
+</pkgmetadata>
diff --git a/dev-ml/x509/x509-0.13.0.ebuild b/dev-ml/x509/x509-0.13.0.ebuild
new file mode 100644
index 0000000000..ff84020ed1
--- /dev/null
+++ b/dev-ml/x509/x509-0.13.0.ebuild
@@ -0,0 +1,41 @@
+# Copyright 2020-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit dune
+
+MY_P="${PN}-v${PV}"
+
+DESCRIPTION="Public Key Infrastructure purely in OCaml"
+HOMEPAGE="https://github.com/mirleft/ocaml-x509"
+SRC_URI="https://github.com/mirleft/ocaml-x509/releases/download/v${PV}/${MY_P}.tbz"
+S="${WORKDIR}/${MY_P}"
+
+LICENSE="BSD-2"
+SLOT="0/${PV}"
+KEYWORDS="~amd64"
+IUSE="ocamlopt test"
+
+RDEPEND="
+	dev-ml/asn1-combinators
+	dev-ml/cstruct
+	dev-ml/domain-name
+	dev-ml/fmt
+	dev-ml/gmap
+	dev-ml/ipaddr
+	dev-ml/logs
+	dev-ml/mirage-crypto[ec,pk,rng]
+	dev-ml/ocaml-base64
+	dev-ml/pbkdf
+	dev-ml/ptime
+"
+DEPEND="
+	${RDEPEND}
+	test? (
+		dev-ml/alcotest
+		dev-ml/cstruct[unix]
+	)
+"
+
+RESTRICT="!test? ( test )"