diff --git a/examples/stop_ids_for_agency.py b/examples/stop_ids_for_agency.py
new file mode 100644
index 0000000..dec4faa
--- /dev/null
+++ b/examples/stop_ids_for_agency.py
@@ -0,0 +1,16 @@
+
+
+import onebusaway
+
+
+def main_sync() -> None:
+    client = onebusaway.OnebusawaySDK(api_key="TEST")
+    agency_id = "40";
+    stop_ids = client.stop_ids_for_agency.list(agency_id)
+    if stop_ids.data:
+        for stop_id in stop_ids.data.list:
+            print(stop_id)
+
+
+if __name__ == "__main__":
+    main_sync()
diff --git a/src/onebusaway/resources/stop_ids_for_agency.py b/src/onebusaway/resources/stop_ids_for_agency.py
index 2b1dbee..a611a6e 100644
--- a/src/onebusaway/resources/stop_ids_for_agency.py
+++ b/src/onebusaway/resources/stop_ids_for_agency.py
@@ -54,7 +54,7 @@ def list(
         if not agency_id:
             raise ValueError(f"Expected a non-empty value for `agency_id` but received {agency_id!r}")
         return self._get(
-            f"/api/where/stop-ids-for-agency/agencyID.json",
+            f"/api/where/stop-ids-for-agency/{agency_id}.json",
             options=make_request_options(
                 extra_headers=extra_headers, extra_query=extra_query, extra_body=extra_body, timeout=timeout
             ),
@@ -97,7 +97,7 @@ async def list(
         if not agency_id:
             raise ValueError(f"Expected a non-empty value for `agency_id` but received {agency_id!r}")
         return await self._get(
-            f"/api/where/stop-ids-for-agency/agencyID.json",
+            f"/api/where/stop-ids-for-agency/{agency_id}.json",
             options=make_request_options(
                 extra_headers=extra_headers, extra_query=extra_query, extra_body=extra_body, timeout=timeout
             ),