WordPress REST API Explained: What It Is and How to Use It [2025]

The WordPress REST API opens a world of possibilities: headless websites, mobile apps, and integrations with other systems. In this guide, we explain what the REST API is and how to use it practically.

What is the REST API?

REST stands for "Representational State Transfer" - a way for different systems to communicate via standard HTTP requests. The WordPress REST API allows you to retrieve, create, edit, and delete WordPress data programmatically.

Standard Endpoints

• /wp-json/wp/v2/posts - Posts
• /wp-json/wp/v2/pages - Pages
• /wp-json/wp/v2/categories - Categories
• /wp-json/wp/v2/media - Media
• /wp-json/wp/v2/users - Users

Practical Usage

Fetching Posts

GET https://yoursite.com/wp-json/wp/v2/posts

Filtering and Pagination

• ?per_page=5 - Limit results
• ?categories=3 - Filter by category
• ?search=keyword - Search

Authentication

Use Application Passwords (built-in since WP 5.6) or JWT for authenticated requests.

Headless WordPress

Use WordPress as a backend with React, Vue, or Next.js as the frontend.

Conclusion

The WordPress REST API transforms WordPress into a powerful content platform for modern applications.

Frequently Asked Questions

How long does it take to implement this?

Implementation time varies per situation. Simple configurations can be done within an hour, more complex setups may take several hours to a day.

What are the costs?

Costs depend on your hosting provider and package. Many basic features are included for free, advanced features may incur additional costs.

Do I need technical knowledge?

You need little technical knowledge for the basics. Most hosting providers offer extensive documentation and support to help you.