diff --git a/README.md b/README.md
index 3640cde..7d0cd8c 100644
--- a/README.md
+++ b/README.md
@@ -60,3 +60,10 @@ npm install --save hexdump.js
 # As a global CLI (useful on windows)
 npm install --global hexdump.js
 ```
+
+API
+---
+
+```
+hexdump(arrayBuffer, byteOffset, byteLength);
+```
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