diff --git a/content/tools.md b/content/tools.md
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+++ b/content/tools.md
@@ -20,6 +20,7 @@ Name | Language | CodeMeta versions | Maintainers | Description
 [codemeta-server](https://github.com/proycon/codemeta-server) | Python | 2.0.0, 3.0.0 | [proycon](https://github.com/proycon) | Webservice offering an API (including SPARQL) and simple human web-interface so search and browse software metadata
 [codemetapy](https://github.com/proycon/codemetapy) | Python | 2.0.0, 3.0.0 | [proycon](https://github.com/proycon) | Generate CodeMeta for Python, NodeJS, Java packages and others; + generic CodeMeta manipulation
 [codemetar](https://ropensci.github.io/codemetar) | R | 2.0.0 | [cboettig](https://github.com/cboettig) | Generate CodeMeta for R packages; + generic CodeMeta manipulation
+[Contributors Metadata Check](https://github.com/marketplace/actions/contributors-metadata-check) | Python | 2.0.0, 3.0.0 | [vuillaut](https://github.com/vuillaut) | GitHub Action that checks git contributors are listed in `codemeta.json`. Can comment on pull requests when some are missing
 [FACILE-RS](https://git.opencarp.org/openCARP/FACILE-RS) | Python | 2.0.0 | [MarieHouillon](https://github.com/MarieHouillon) | Metadata conversion (to Citation File Format (CFF), DataCite, BagIt and BagPack) and software publication pipelines based on CodeMeta. Previously known as openCARP-CI.
 [Somef](https://github.com/KnowledgeCaptureAndDiscovery/somef) | Python | OEG developers | [dgarijo](http://github.com/dgarijo) | Tool that automatically extracts software metadata from repositories and scientific publications
 [tributors](https://con.github.io/tributors/) | Python | 2.0.0 | [vsoch](https://github.com/vsoch) | Generate CodeMeta contributors section from GitHub API and ORCID API