Remove /collections-search from default landing page (#524)

**Related Issue(s):**

- #523 

**Description:**

- Removed `/collections-search` endpoint from default landing page. It
now only shows when `ENABLE_COLLECTIONS_SEARCH_ROUTE` is set to `True`.

**PR Checklist:**

- [x] Code is formatted and linted (run `pre-commit run --all-files`)
- [x] Tests pass (run `make test`)
- [x] Documentation has been updated to reflect changes, if applicable
- [x] Changes are added to the changelog

Author: jonhealy1

CHANGELOG.md

@@ -17,6 +17,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Removed
 
+- Removed `/collections-search` endpoint from default landing page. It now only shows when `ENABLE_COLLECTIONS_SEARCH_ROUTE` is set to `True`. [#524](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/524)
+
 ### Updated
 
 ## [v6.7.2] - 2025-11-04

stac_fastapi/core/stac_fastapi/core/core.py

@@ -137,20 +137,6 @@ def _landing_page(
                     "href": urljoin(base_url, "search"),
                     "method": "POST",
                 },
-                {
-                    "rel": "collections-search",
-                    "type": "application/json",
-                    "title": "Collections Search",
-                    "href": urljoin(base_url, "collections-search"),
-                    "method": "GET",
-                },
-                {
-                    "rel": "collections-search",
-                    "type": "application/json",
-                    "title": "Collections Search",
-                    "href": urljoin(base_url, "collections-search"),
-                    "method": "POST",
-                },
             ],
             stac_extensions=extension_schemas,
         )
@@ -202,6 +188,26 @@ async def landing_page(self, **kwargs) -> stac_types.LandingPage:
                 ]
             )
 
+        if self.extension_is_enabled("CollectionsSearchEndpointExtension"):
+            landing_page["links"].extend(
+                [
+                    {
+                        "rel": "collections-search",
+                        "type": "application/json",
+                        "title": "Collections Search",
+                        "href": urljoin(base_url, "collections-search"),
+                        "method": "GET",
+                    },
+                    {
+                        "rel": "collections-search",
+                        "type": "application/json",
+                        "title": "Collections Search",
+                        "href": urljoin(base_url, "collections-search"),
+                        "method": "POST",
+                    },
+                ]
+            )
+
         # Add OpenAPI URL
         landing_page["links"].append(
             {