diff --git a/content/concepts/tools.md b/content/concepts/tools.md
index 123f665c..a63b0264 100644
--- a/content/concepts/tools.md
+++ b/content/concepts/tools.md
@@ -5,7 +5,13 @@ description: Tools and examples for developing with Ocean Protocol.
 
 ## Tools
 
-Coming soon!
+[Plecos](https://github.com/oceanprotocol/plecos) is a Python tool to check metadata (a JSON file) to see if it conforms to the [OEP8 schema](https://github.com/oceanprotocol/OEPs/tree/master/8). Plecos wraps the [jsonschema](https://github.com/Julian/jsonschema) validator. 
+
+Users can use Plecos to check their metadata before sending it to an Aquarius instance. Plecos is manually updated with a schema file according to [OEP8](https://github.com/oceanprotocol/OEPs/tree/master/8). Find the tool in [PyPI](https://pypi.org/project/plecos/). 
+
+Plecos can be used in a microservice to facilitate data onboarding, as described in the [plecos_service](https://github.com/oceanprotocol/plecos_service) repository. 
+
+<repo name="Plecos"></repo>
 
 ## Examples
 
diff --git a/data/repositories.yml b/data/repositories.yml
index 58e3199b..7692dd7b 100644
--- a/data/repositories.yml
+++ b/data/repositories.yml
@@ -28,6 +28,7 @@
         - name: API reference
           url: /references/squid-py/
     - name: squid-java
+    - name: Plecos
 
 - group: OceanDB
   items: