diff --git a/README.md b/README.md
index 2c1bcde..9b07055 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,12 @@ action=create
 u=http://localhost/cgi-bin/csaf_provider.go
 ```
 
+## csaf_checker
+
+Provider checker is a tool for testing a CSAF trusted provider according to [Section 7 of the CSAF standard](https://docs.oasis-open.org/csaf/csaf/v2.0/csaf-v2.0.html#7-distributing-csaf-documents).
+Usage example:
+``` ./csaf_checker example.com -f html > check-results.html```
+
 ## License
 
 - csaf_distribution is licensed as Free Software under MIT License.