diff --git a/Terminal-API.md b/Terminal-API.md
index 32c6f90..86db3bd 100644
--- a/Terminal-API.md
+++ b/Terminal-API.md
@@ -6,6 +6,10 @@ The [terminalapi](https://github.com/mum4k/termdash/tree/master/terminal/termina
 
 The public API surface of this package consists of the following:
 
+## [terminalapi.Terminal](https://github.com/mum4k/termdash/blob/ffbf88caeddb1735dcf2a5f735eec80dc9cf9fe7/terminal/terminalapi/terminalapi.go#L25-L52)
+
+All terminal implementations must implement this interface.
+
 ## [terminalapi.ColorMode](https://github.com/mum4k/termdash/blob/ffbf88caeddb1735dcf2a5f735eec80dc9cf9fe7/terminal/terminalapi/color_mode.go#L19-L20)
 
 The **ColorMode** property specifies the amount of colors that can be displayed on a terminal and how are they addressed.