diff --git a/docs/extrinsic-metadata-specification.rst b/docs/extrinsic-metadata-specification.rst
--- a/docs/extrinsic-metadata-specification.rst
+++ b/docs/extrinsic-metadata-specification.rst
@@ -274,9 +274,12 @@
 
 ``application/vnd.github.v3+json``
     The metadata is the response of an API call to GitHub.
+``cpan-release-json``
+    The metadata is the response of an API call to `CPAN's /release/{author}/{release}
+    <https://github.com/metacpan/metacpan-api/blob/master/docs/API-docs.md#releaseauthorrelease>`_ endpoint.
 ``gitlab-project-json``
     The metadata is the response of an API call to `Gitlab's /api/v4/projects/:id
-    <https://docs.gitlab.com/ee/api/projects.html#get-single-project>` endpoint.
+    <https://docs.gitlab.com/ee/api/projects.html#get-single-project>`_ endpoint.
 ``gitea-project-json``
     The metadata is the response of an API call to `Gitea's /api/v1/repos/{owner}/{repo}
     <https://gittea.dev/api/swagger#/repository/repoGet>`_ endpoint.