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How can I create a custom REST API endpoint in WordPress?

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How can I create a custom REST API endpoint in WordPress?

Asked on Mar 24, 2026

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Creating a custom REST API endpoint in WordPress allows you to extend the functionality of your site by exposing specific data or actions through a custom URL. This is done using WordPress hooks and functions to register the endpoint and define its behavior.

<!-- BEGIN COPY / PASTE -->
    add_action('rest_api_init', function () {
        register_rest_route('myplugin/v1', '/data/', array(
            'methods' => 'GET',
            'callback' => 'my_custom_endpoint_callback',
        ));
    });

    function my_custom_endpoint_callback($data) {
        return new WP_REST_Response(array('message' => 'Hello, World!'), 200);
    }
    <!-- END COPY / PASTE -->

Additional Comment:

Place the code in your theme's functions.php file or a custom plugin.
Replace "myplugin/v1" with your desired namespace and version.
The callback function should return a WP_REST_Response object or a similar structure.
Test the endpoint by visiting "https://yourdomain.com/wp-json/myplugin/v1/data" in your browser.

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How can I create a custom REST API endpoint in WordPress?

Asked on Mar 24, 2026

Answer

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