diff --git a/bin/wp-cli.php b/bin/wp-cli.php
index 5e1656c..4987f03 100644
--- a/bin/wp-cli.php
+++ b/bin/wp-cli.php
@@ -57,10 +57,18 @@ private function contain_memory_leaks() {
 			return;
 		}
 
-		$wp_object_cache->group_ops = array();
-		$wp_object_cache->stats = array();
-		$wp_object_cache->memcache_debug = array();
-		$wp_object_cache->cache = array();
+		if ( isset( $wp_object_cache->group_ops ) ) {
+			$wp_object_cache->group_ops = [];
+		}
+
+		if ( isset( $wp_object_cache->memcache_debug ) ) {
+			$wp_object_cache->memcache_debug = [];
+		}
+
+		if ( isset( $wp_object_cache->cache ) ) {
+			$wp_object_cache->cache = [];
+		}
+
 		if ( method_exists( $wp_object_cache, '__remoteset' ) ) {
 			$wp_object_cache->__remoteset();
 		}
@@ -287,7 +295,7 @@ public function index( $args, $assoc_args ) {
 
 			WP_CLI::log(
 				sprintf(
-					'Indexing %1$s, %2$d at a time, starting on page %3$d',
+					'Indexing %1$s, %2$s at a time, starting on page %3$d',
 					$limit_text,
 					number_format( $assoc_args['bulk'] ),
 					absint( $assoc_args['page'] )
diff --git a/lib/class-sp-api.php b/lib/class-sp-api.php
index 00e7303..0effbff 100644
--- a/lib/class-sp-api.php
+++ b/lib/class-sp-api.php
@@ -265,6 +265,13 @@ public function request( $url = '', $method = 'GET', $body = '', $request_params
 				'body'   => $body,
 			)
 		);
+		/**
+		 * Filters the API URL directly before the request is made.
+		 *
+		 * @param string $url The URL of the request.
+		 * @param array $request_params The request params.
+		 */
+		$url = apply_filters( 'sp_api_request_url', $url, $request_params );
 
 		$result = sp_remote_request( $url, $request_params );
 
diff --git a/lib/class-sp-debug.php b/lib/class-sp-debug.php
index b6d6072..66f2775 100644
--- a/lib/class-sp-debug.php
+++ b/lib/class-sp-debug.php
@@ -81,9 +81,10 @@ public static function split() {
 	 */
 	public static function debug_sp_post_pre_index( $data ) {
 		do_action( 'sp_debug', '[SP_Post] Post JSON', wp_json_encode( $data ) );
+		return $data;
 	}
 }
 add_action( 'sp_debug', array( 'SP_Debug', 'debug' ), 10, 2 );
-add_action( 'sp_post_pre_index', array( 'SP_Debug', 'debug_sp_post_pre_index' ), 999 );
+add_filter( 'sp_post_pre_index', array( 'SP_Debug', 'debug_sp_post_pre_index' ), 999 );
 
 SP_Debug::init();
diff --git a/lib/class-sp-integration.php b/lib/class-sp-integration.php
index 80c8b4d..6d45408 100644
--- a/lib/class-sp-integration.php
+++ b/lib/class-sp-integration.php
@@ -196,7 +196,7 @@ public function force_search_template( &$wp_query ) {
 		$this->sp = get_query_var( 'sp' );
 
 		// If this is a search, but not a keyword search, we have to fake it.
-		if ( ! $wp_query->is_search() && ! empty( $this->sp ) && 1 === intval( $this->sp['force'] ) ) {
+		if ( ! $wp_query->is_search() && isset( $this->sp['force'] ) && 1 === intval( $this->sp['force'] ) ) {
 			// First, we'll set the search string to something phony.
 			$wp_query->set( 's', '1441f19754335ca4638bfdf1aea00c6d' );
 			$wp_query->is_search = true;