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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 Jan 08, 2026

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Creating a custom REST API endpoint in WordPress involves using the `register_rest_route` function to define a new route and its callback function. This is typically done in your theme's `functions.php` file or a custom plugin.

<!-- 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:

Ensure your callback function returns a `WP_REST_Response` object for proper REST API responses.
Use the `rest_api_init` action hook to register your custom routes.
Test your endpoint by visiting `https://yourdomain.com/wp-json/myplugin/v1/data/`.

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

Asked on Jan 08, 2026

Answer

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