diff --git a/includes/class-spacefast-plugin.php b/includes/class-spacefast-plugin.php
index 43a0772..1dfffd3 100644
--- a/includes/class-spacefast-plugin.php
+++ b/includes/class-spacefast-plugin.php
@@ -235,7 +235,7 @@ public static function create_space(): void {
 				'idempotency_key' => $idempotency_key,
 			);
 		}
-		if ( ! preg_match( '/^team_[A-Za-z0-9_-]+$/', $team_id ) || '' === $title ) {
+		if ( ! self::valid_space_creation_identity( $team_id, $title ) ) {
 			self::notice( 'error', __( 'Spacefast could not determine the Team or Space name.', 'spacefast-wordpress' ) );
 			self::redirect();
 		}
@@ -260,6 +260,12 @@ public static function create_space(): void {
 		self::redirect();
 	}
 
+	private static function valid_space_creation_identity( string $team_id, string $title ): bool {
+		// Team IDs are opaque API identifiers. Do not impose a client-side prefix
+		// that can drift from the control plane's current identifier format.
+		return '' !== trim( $team_id ) && '' !== trim( $title );
+	}
+
 	/**
 	 * @param array<string,mixed> $space Spacefast Space.
 	 * @param array<string,mixed> $team Authorized Team.
diff --git a/readme.txt b/readme.txt
index fb77ee3..8275a76 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: spacefast
 Tags: static site, headless cms, simply static, deployment
 Requires at least: 6.5
 Requires PHP: 8.1
-Stable tag: 0.5.0
+Stable tag: 0.5.1
 License: GPLv2 or later
 
 Publish a Simply Static export to Spacefast, or rebuild a headless site when WordPress content changes.
@@ -31,6 +31,9 @@ OAuth access is limited to the Team you authorize and the mode you choose. WordP
 
 == Changelog ==
 
+= 0.5.1 =
+* Accept Spacefast's opaque Team identifiers when creating a Space from WordPress.
+
 = 0.5.0 =
 * Replace the mode-first wizard with a WordPress-first Publish with Spacefast journey.
 * Install and activate Simply Static from the primary setup action when permitted.
diff --git a/spacefast-wordpress.php b/spacefast-wordpress.php
index 84cb17d..1a22663 100644
--- a/spacefast-wordpress.php
+++ b/spacefast-wordpress.php
@@ -3,7 +3,7 @@
  * Plugin Name: Spacefast
  * Plugin URI: https://spacefast.com/
  * Description: Publishes static WordPress exports or rebuilds a headless Spacefast site.
- * Version: 0.5.0
+ * Version: 0.5.1
  * Update URI: https://github.com/spacefast/wordpress
  * Requires at least: 6.5
  * Requires PHP: 8.1
@@ -14,7 +14,7 @@
 
 defined( 'ABSPATH' ) || exit;
 
-define( 'SPACEFAST_WORDPRESS_VERSION', '0.5.0' );
+define( 'SPACEFAST_WORDPRESS_VERSION', '0.5.1' );
 define( 'SPACEFAST_WORDPRESS_FILE', __FILE__ );
 
 require_once __DIR__ . '/includes/class-spacefast-settings.php';
diff --git a/tests/acceptance/wordpress.php b/tests/acceptance/wordpress.php
index 2fada9f..9be544e 100644
--- a/tests/acceptance/wordpress.php
+++ b/tests/acceptance/wordpress.php
@@ -113,7 +113,7 @@ function spacefast_accept( bool $condition, string $message ): void {
 );
 
 $plugin = get_plugin_data( WP_PLUGIN_DIR . '/spacefast-wordpress/spacefast-wordpress.php', false, false );
-spacefast_accept( '0.5.0' === $plugin['Version'], 'Unexpected plugin version.' );
+spacefast_accept( '0.5.1' === $plugin['Version'], 'Unexpected plugin version.' );
 spacefast_accept( 'https://github.com/spacefast/wordpress' === $plugin['UpdateURI'], 'Update URI is missing.' );
 
 Spacefast_Settings::disconnect();
diff --git a/tests/behavior.php b/tests/behavior.php
index 023bacf..6c4d626 100644
--- a/tests/behavior.php
+++ b/tests/behavior.php
@@ -328,6 +328,15 @@ static function ( string $url, array $args ) use ( &$create_requests ): array {
 	array( 'teamId' => 'team_demo', 'title' => 'Spacefast Launchpad' ) === json_decode( $create_requests[0][1]['body'], true ),
 	'creates the Space in the authorized Team with the WordPress site name'
 );
+$valid_space_creation_identity = new ReflectionMethod( Spacefast_Plugin::class, 'valid_space_creation_identity' );
+check(
+	true === $valid_space_creation_identity->invoke( null, 'A7bc9DeF2gHi3JkLmN4pQrStUvWxYz01', 'Spacefast Launchpad' ),
+	'accepts the opaque Team identifiers returned by Spacefast when creating a Space'
+);
+check(
+	false === $valid_space_creation_identity->invoke( null, '', 'Spacefast Launchpad' ),
+	'rejects Space creation when the authorized Team is missing'
+);
 $choices_before_creation = get_option( Spacefast_OAuth::CHOICES_OPTION );
 Spacefast_OAuth::remember_space_choice( $created_space['data']['space'] );
 Spacefast_OAuth::remember_space_choice( $created_space['data']['space'] );