Let's monitor all the available routes.

tests/data/rest-api/routes/oembed-1-0-embed.json

@@ -0,0 +1,3 @@
+{
+    "route": "/oembed/1.0/embed"
+}

tests/data/rest-api/routes/oembed-1-0-proxy.json

@@ -0,0 +1,3 @@
+{
+    "route": "/oembed/1.0/proxy"
+}

tests/data/rest-api/routes/oembed-1-0.json

@@ -0,0 +1,3 @@
+{
+    "route": "/oembed/1.0"
+}

tests/data/rest-api/routes/routes.json

@@ -1,4 +1,19 @@
 [
+    "/oembed/1.0",
+    "/oembed/1.0/embed",
+    "/oembed/1.0/proxy",
+    "/wp-block-editor/v1",
+    "/wp-block-editor/v1/export",
+    "/wp-block-editor/v1/navigation-fallback",
+    "/wp-block-editor/v1/url-details",
+    "/wp-site-health/v1",
+    "/wp-site-health/v1/directory-sizes",
+    "/wp-site-health/v1/tests/authorization-header",
+    "/wp-site-health/v1/tests/background-updates",
+    "/wp-site-health/v1/tests/dotorg-communication",
+    "/wp-site-health/v1/tests/https-status",
+    "/wp-site-health/v1/tests/loopback-requests",
+    "/wp-site-health/v1/tests/page-cache",
     "/wp/v2",
     "/wp/v2/block-directory/search",
     "/wp/v2/block-patterns/categories",

tests/data/rest-api/routes/wp-block-editor-v1-export.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-block-editor/v1/export"
+}

tests/data/rest-api/routes/wp-block-editor-v1-navigation-fallback.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-block-editor/v1/navigation-fallback"
+}

tests/data/rest-api/routes/wp-block-editor-v1-url-details.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-block-editor/v1/url-details"
+}

tests/data/rest-api/routes/wp-block-editor-v1.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-block-editor/v1"
+}

tests/data/rest-api/routes/wp-site-health-v1-directory-sizes.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1/directory-sizes"
+}

tests/data/rest-api/routes/wp-site-health-v1-tests-authorization-header.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1/tests/authorization-header"
+}

tests/data/rest-api/routes/wp-site-health-v1-tests-background-updates.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1/tests/background-updates"
+}

tests/data/rest-api/routes/wp-site-health-v1-tests-dotorg-communication.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1/tests/dotorg-communication"
+}

tests/data/rest-api/routes/wp-site-health-v1-tests-https-status.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1/tests/https-status"
+}

tests/data/rest-api/routes/wp-site-health-v1-tests-loopback-requests.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1/tests/loopback-requests"
+}

tests/data/rest-api/routes/wp-site-health-v1-tests-page-cache.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1/tests/page-cache"
+}

tests/data/rest-api/routes/wp-site-health-v1.json

@@ -0,0 +1,3 @@
+{
+    "route": "/wp-site-health/v1"
+}

tests/output/routes.php

@@ -2,14 +2,18 @@
 
 namespace WPJsonSchemas;
 
-$data = get_rest_response( 'GET', '/wp/v2', [] );
-
-$d = $data->get_data();
-
-$routes = array_map( function( array $data, string $route ) : array {
-	$data['route'] = $route;
-	return $data;
-}, $d['routes'], array_keys( $d['routes'] ) );
+$root = get_rest_response( 'GET', '/' )->get_data();
+$namespaces = $root['namespaces'];
+$routes = [];
+
+foreach ( $namespaces as $namespace ) {
+	$d = get_rest_response( 'GET', '/' . $namespace )->get_data();
+	$namespace_routes = array_map( function( array $data, string $route ) : array {
+		$data['route'] = $route;
+		return $data;
+	}, $d['routes'], array_keys( $d['routes'] ) );
+	$routes = array_merge( $routes, $namespace_routes );
+}
 
 $dir = 'routes';
 $dir = dirname( ABSPATH ) . '/data/rest-api/' . $dir;