diff --git a/docs/functionality.md b/docs/functionality.md
index 30e6c8e..c2ab85f 100644
--- a/docs/functionality.md
+++ b/docs/functionality.md
@@ -25,6 +25,28 @@ Processes a transaction and passes it on to the next filter or terminates the pi
 
 - Fetches a block (and some of its header details), transactions and transaction receipts embedded within the transaction object in a single call.
 
+### NATS JetStream
+
+- The final filter will emit an event to JetStream.
+
+To view/debug the JetStream messages, you can use [Benthos](https://benthos.dev)
+
+With a config like:
+
+```yaml
+input:
+  label: jetstream
+  nats_jetstream:
+    urls:
+      - nats://127.0.0.1:4222
+    subject: "CHAIN.*"
+    durable: benthos
+    deliver: all
+output:
+  stdout:
+    codec: lines
+```
+
 ## Caveats
 
 - Blocks are not guaranteed to be processed in order, however a low concurrency setting would somewhat give an "in-order" behaviour (not to be relied upon in any case).