diff --git a/README.md b/README.md
index 9381a64..898256e 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,18 @@ marked.parse('$[x2 beeg text]')
 // <p><span class="mfm _mfm_x2_" >beeg text</span></p>
 ```
 
+there is also an interactive CLI:
+
+```html
+$ npm run dingus
+marked-mfm interactive parser
+version 0.0.0
+> $[x2 beeg text]
+<p><span class="mfm _mfm_x2_" >beeg text</span></p>
+```
+
+you should use it to figure out whether a bug is with marked-mfm or with the frontend it's used on.
+
 ## contributing
 
 development discussion takes place on [`#mfm`](https://irc.akkoma.dev/#mfm). contribute by sending pull requests, or patches to my [public inbox](mailto:~sfr/public-inbox@lists.sr.ht).