diff --git a/README.md b/README.md
index f9dabfc..4407ecb 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 Compass is a GPS tracking server that stores data in [flat files](https://github.com/aaronpk/QuartzDB).
 
+![mapview](screenshot-mapview.jpg)
+
 ## Setup
 
 In the `compass` directory, copy `.env.example` to `.env` and fill in the details. Install the dependencies with composer.
@@ -18,11 +20,34 @@ To write to a database, make a POST request in JSON format with the following ke
 `POST /api/input`
 
 * locations - a list of GeoJSON objects
-* token - the write token for the database
+* token - the write token for the database (as a query string parameter or in the post body)
 
 The GeoJSON objects must have at least one property, "timestamp", which is can be any value that can be interpreted as a date. The object can have any additional properties you wish.
 
-The open source iOS [GPS Logger](https://github.com/esripdx/GPS-Logger-iOS) will send data in this format by default.
+The open source iOS [GPS Logger](https://github.com/aaronpk/GPS-Logger-iOS) will send data in this format by default.
+
+```
+POST /api/input?token=XXXXXXX HTTP/1.1
+Content-type: application/json
+
+{
+  "locations": [
+    {
+      "type": "Feature",
+      "geometry": {
+        "type": "Point",
+        "coordinates": [-122.621, 45.535]
+      },
+      "properties": {
+        "timestamp": "2017-01-01T10:00:00-0700",
+        "horizontal_accuracy": 65
+      }
+    }
+  ],
+  "token": "XXXXXXX"
+}
+```
+
 
 ### Reading
 
@@ -66,6 +91,7 @@ This will query the database and find the closest matching location for when you
 
 Compass icon by Ryan Spiering from the Noun Project.
 
+Screenshot of the map view by Sebastiaan Andeweg.
 
 ## License
 
diff --git a/screenshot-mapview.jpg b/screenshot-mapview.jpg
new file mode 100644
index 0000000..5fe2aea
Binary files /dev/null and b/screenshot-mapview.jpg differ