I was travelling to attend WordCamp Asia 2026 in Mumbai, India with my nephew and cousin, and I was telling them how they can use WordPress Playground to explore WordPress, as they are new to it. While discussing WP Playground, I got the idea to build a playground for the REST API.

On the way back home, I used Claude Code to build the plugin, and the MVP was ready within 2–3 hours — and it works great. 100% developed with Claude Code, with manual code review and minor tweaks.

Following are the key features of the plugin:

• Three-panel layout — endpoint browser on the left, request builder in the centre, response viewer on the right.
• Full endpoint discovery — all registered REST API routes (core and plugin-added) are loaded automatically and grouped by resource type (Posts, Pages, Users, Media, Comments, and more).
• Live search — filter endpoints by route path or category as you type.
• Method tabs — switch between GET, POST, PUT, PATCH, and DELETE for any route that supports multiple methods.
• Schema-driven form fields — path parameters, query parameters, and request body fields are rendered from the endpoint’s registered schema.
• Application Password authentication — enter credentials once; saved to sessionStorage and cleared when the tab closes. Every request also includes the WordPress nonce (X-WP-Nonce) for cookie-based sessions.
• Syntax-highlighted response — with a response headers tab, copy to clipboard, and a timing indicator showing round-trip duration in milliseconds.
• Administrator-only access — restricted to users with the manage_options capability at /rest-api-playground/.

If you are working with the WordPress REST API, do give it a try. If something is not working or you have a feature request in mind, please open a GitHub issue — I would love to hear your feedback.

GitHub: chandrapatel/wp-rest-api-playground