@ddbeck/mdn-content-inventory is MDN Web Docs content metadata as a package.
You can use it to query MDN page metadata without having to clone the large repository and parse the frontmatter yourself.
MDN Web Docs page metadata and frontmatter by Mozilla Contributors is licensed under CC-BY-SA 2.5.
For the code that build, publishes, and exports the MDN data, see LICENSE.txt.