diff --git a/data/api_keys/google_api.txt b/data/api_keys/google_api.txt
index 9b34479..cee16a4 100644
--- a/data/api_keys/google_api.txt
+++ b/data/api_keys/google_api.txt
@@ -5,4 +5,6 @@
 # https://developers.google.com/custom-search/v1/overview
 # Make sure to use a different Google account for each key, cause I'm
 # pretty sure the ratelimit is on a per-account basis :P
+# Custom Search JSON API provides 100 search queries per day for free.
+# Additional requests cost $5 per 1000 queries, up to 10k queries per day.
 #
\ No newline at end of file