diff --git a/stac_fastapi/types/stac_fastapi/types/requests.py b/stac_fastapi/types/stac_fastapi/types/requests.py
index c9be8b6f6..15409e3d1 100644
--- a/stac_fastapi/types/stac_fastapi/types/requests.py
+++ b/stac_fastapi/types/stac_fastapi/types/requests.py
@@ -1,10 +1,15 @@
 """Requests helpers."""
 
+import os
+
 from starlette.requests import Request
 
 
 def get_base_url(request: Request) -> str:
     """Get base URL with respect of APIRouter prefix."""
+    if base_url := os.environ.get("REQUEST_BASE_URL"):
+        return base_url
+
     app = request.app
     if not app.state.router_prefix:
         return str(request.base_url)
diff --git a/stac_fastapi/types/tests/test_requests.py b/stac_fastapi/types/tests/test_requests.py
new file mode 100644
index 000000000..57f6d17d4
--- /dev/null
+++ b/stac_fastapi/types/tests/test_requests.py
@@ -0,0 +1,15 @@
+import os
+from unittest import mock
+
+from starlette.requests import Request
+
+from stac_fastapi.types.requests import get_base_url
+
+
+def test_get_base_url_with_env():
+    env = {"REQUEST_BASE_URL": "http://example.com/path/"}
+    with mock.patch.dict(os.environ, env):
+        assert (
+            get_base_url(Request({"type": "http", "app": None}))
+            == "http://example.com/path/"
+        )