diff --git a/api.md b/api.md
index 5feafcd..bf92874 100644
--- a/api.md
+++ b/api.md
@@ -1,3 +1,11 @@
 # WiFi Pineapple Module API
 
-Work in progress
+## Introduction
+Unlike the old web interface, the back end of the new interface has been decoupled from the front end. All requests to perform system actions are sent as POSTs to `/api/`. The content of the POST is JSON and contains a minimal of two parameters.
+### The first parameter key must be either `system` or `module`
+`system` is used for core system functions such as logging users in and performing system setup as well as managing notifications. `module` is used when sending a request to any of the default modules or to any user modules. The value is set to the module with which you are trying to communicate. For example, `"system": "notifications"` or `"module": "RandomRoll"`.
+### The second parameter key `action`
+This is set to the action you wish to perform. For instance, this could be `"action": "listNotifications"` or `"action": "getRandomRollRolls"`.
+### Any other parameters are optional and are specific to the module and action you are requesting
+Many actions do not require additional parameters. For instance, `{"system": "notifications", "action": "listNotifications"}` will return a list of all of the current unread notifications (as JSON). However, there are some functions, such as `addNotification`, that require additional parameters (in this case `message`). To create a new notifications, one would use the following request:
+`{"system": "notifications", "action": "addNotification", "message": "Hello World!"}`