diff --git a/docs/feature-guides/rate-limiting.md b/docs/feature-guides/rate-limiting.md
index 2ecb6eb8..d8d75fdc 100644
--- a/docs/feature-guides/rate-limiting.md
+++ b/docs/feature-guides/rate-limiting.md
@@ -8,4 +8,6 @@ The Rate Limit per Minute(RPM) is applied to all the API endpoints based on the
 
 | **Endpoint**                                                                                | **Rate per minute(RPM) limit** |
 | ------------------------------------------------------------------------------------------- |-----------------------|
-| api.mainnet.hiro.so/ordinals | <br/> 500 <br/> <br/> |
\ No newline at end of file
+| api.mainnet.hiro.so/ordinals | <br/> 500 <br/> <br/> |
+
+If you need an API key, you can apply for one [here](https://survey.hiro.so/hiroapi).