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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 Dec 26, 2025

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Creating a custom REST API endpoint in WordPress allows you to extend the REST API with your own functionality. This involves using the `register_rest_route` function to define your endpoint and a callback function to handle requests.

<!-- 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(WP_REST_Request $request) {
      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.
Ensure your endpoint is unique by using a namespace like 'myplugin/v1'.
Use the `WP_REST_Request` object to access request parameters.
Return a `WP_REST_Response` object to provide a structured response.

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

Asked on Dec 26, 2025

Answer

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