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3. WordPress REST API & Headless CMS

Exposing endpoints and decoupled web3 integration.

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WordPress exposes endpoints at `/wp-json/wp/v2/`. Custom endpoints are registered via `register_rest_route` with permission callbacks and schema validation.

php
add_action('rest_api_init', function() {
    register_rest_route('app/v1', '/data', [
        'methods' => 'GET',
        'callback' => 'get_custom_data',
        'permission_callback' => '__return_true'
    ]);
});

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Check your understanding

1. How do you register a custom endpoint on the WordPress REST API?
register_rest_route() inside the rest_api_init action hookUsing add_action('init')Editing .htaccessWriting to /api folder
2. Why must custom REST API routes include a permission_callback in modern WordPress?
Required to prevent unauthorized endpoint access and security warningsTo enable CORSTo format JSONTo enable caching

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