diff --git a/README.md b/README.md
index b426245..c54d7bf 100644
--- a/README.md
+++ b/README.md
@@ -177,6 +177,8 @@ bird --sweetistics-base-url "http://localhost:3000" --sweetistics-api-key "sweet
 When an API key is present, `bird` will use Sweetistics’ `/api/actions/tweet` endpoint and skip local cookie resolution.
 All Sweetistics calls have a 15s timeout so the CLI won’t hang if the API is slow or unreachable.
 
+⚠️ GraphQL mode uses X’s internal endpoints and is rate‑limited aggressively; expect 429s if you run many reads/writes without Sweetistics.
+
 ### Getting Your Cookies
 
 1. Open Chrome and log into x.com