diff --git a/.gitignore b/.gitignore
index a62887b22..adbc5339e 100755
--- a/.gitignore
+++ b/.gitignore
@@ -105,6 +105,9 @@ e2e_*.png
 docs/api/html
 docs/api/nav/
 docs/api/build/
+
+# OpenAPI snapshots of external APIs (reference data, not source)
+docs/openapi/
 superset-tools.bundle
 
 # Axiom semantic index (auto-generated)