diff --git a/README.md b/README.md
index 022fda6..11209d1 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,21 @@ client.trigger(
 )
 ```
 
+## Cache Channels
+
+Publish to a channel named `cache-`, `private-cache-` or `presence-cache-` and Apinator keeps
+the last event for 30 minutes, so a client that subscribes after the publish still receives it.
+Nothing else changes: trigger as usual, and authorize private and presence cache channels like
+any other private or presence channel.
+
+```python
+client.trigger(
+    "job-finished",
+    '{"status": "done"}',
+    channel=f"private-cache-job-{job_id}",
+)
+```
+
 ## Channel Authentication
 
 For private and presence channels, your backend must provide an auth endpoint: