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index 5007d92..d8dbcab 100644
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+++ b/README.md
@@ -1,6 +1,6 @@
 # Freifunk Metadata Wordpress Plugin
 
-A small Wordpress plugin to render Freifunk metadata.
+A small Wordpress plugin to render Freifunk metadata according to the [api.freifunk.net](https://github.com/freifunk/api.freifunk.net) specification ([german description](http://freifunk.net/blog/2013/12/die-freifunk-api/)).
 
 It reads (and caches) JSON input from a configured URL and provides shortcodes to output the data.