diff --git a/README.md b/README.md
index 30937e95..ecf9ac6c 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,8 @@ They might work when connecting to other services, without any guarantee.
 
 Instead of connecting to the OpenAI API for these, you can also connect to a self-hosted [LocalAI](https://localai.io) instance or [Ollama](https://ollama.com/) instance
 or to any service that implements an API similar to the OpenAI one, for example:
-[IONOS AI Model Hub](https://docs.ionos.com/cloud/ai/ai-model-hub), [Plusserver](https://www.plusserver.com/en/ai-platform/) or [MistralAI](https://mistral.ai).
+[IONOS AI Model Hub](https://docs.ionos.com/cloud/ai/ai-model-hub), [Plusserver](https://www.plusserver.com/en/ai-platform/) or [MistralAI](https://mistral.ai).  
+Make sure to use the OpenAI-compatible endpoint instead of the custom ones they provide.
 
 :warning: This app is mainly tested with OpenAI. We do not guarantee it works perfectly
 with other services that implement OpenAI-compatible APIs with slight differences.