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Version: 1.x

API05004: WordPress API Disabled

What This Means​

The WordPress REST API is disabled on your site. All modern WordPress functionality, including WooCommerce and WCPOS, depends on this API.

Common Causes​

  • Security plugin — A plugin is blocking REST API access
  • Hosting restriction — Your host disabled the REST API
  • Custom code — A theme or plugin disabled the API
  • Firewall rules — WAF blocking REST API endpoints

How to Fix​

1. Test the REST API​

Visit https://yoursite.com/wp-json/ in your browser:

  • Should return JSON with available routes
  • If you get an error or nothing, it's blocked

2. Check Security Plugins​

Common plugins that block REST API:

Wordfence:

  • Firewall → All Firewall Options
  • Disable "Disable REST API" option

iThemes Security:

  • Security → Settings → WordPress Tweaks
  • Enable REST API

Disable REST API Plugin:

  • Deactivate this plugin entirely

3. Check for Custom Code​

Look in your theme's functions.php or custom plugins for:

// This code disables REST API - remove it
add_filter('rest_authentication_errors', function($result) {
    return new WP_Error('rest_disabled', 'REST API disabled');
});

4. Check .htaccess​

Remove any rules blocking /wp-json/:

# Bad - blocks REST API
RewriteRule ^wp-json - [F,L]

5. Contact Hosting Provider​

Some hosts block REST API by default:

  • Request they enable it
  • Ask about any security restrictions
  • Check hosting documentation

Why REST API Matters​

The WordPress REST API is essential for:

  • Mobile apps
  • Third-party integrations
  • WooCommerce functions
  • WCPOS operation

Disabling it breaks many features.