diff --git a/doc/developer.md b/doc/developer.md
new file mode 100644
index 0000000..0db18d0
--- /dev/null
+++ b/doc/developer.md
@@ -0,0 +1,18 @@
+## Developer Keys
+
+If you have a developer key, you can provide it in your queries
+to get access to experimental cheat.sh features.
+The developer key must be specified as the `X-Cheatsh-Key` header of the query.
+
+To check, if you key is valid, query `/:authorized`:
+
+```
+$ curl -H "X-Cheatsh-Key: 2ecf6cba-a8b2-04a7-7a51-XXXX" http://127.0.0.1:8002/:authorized
+AUTHORIZED (developer)
+
+$ curl -H "X-Cheatsh-Key: 2ecf6cba-a8b2-04a7-7a51-YYYY" http://127.0.0.1:8002/:authorized
+NOT AUTHORIZED
+```
+
+If you use editor plugins to access *cheat.sh*, see the plugin documentation
+for information about key usage.