How to Find API Endpoint in WordPress

Ensure That Your XML-RPC Interface Is Activated
1. Log into your WordPress Admin page. On the left side, look for the 'Settings' tab and click 'Writing.'
2. On the 'Writing' page, look under the 'Remote Publishing' header for the 'XML-RPC' setting.

3. The checkbox next to 'XML-RPC' should be checked. If it is not checked, check it and then click 'Save Changes.' Once it is checked, your site will be ready to offer XML-RPC services.
Find Your API Endpoint URL
4. In your WordPress Admin page, look on the left for the 'Settings' tab, and click on 'General.'
5. In the 'General Settings' page, look for the 'Site Address (URL)' setting. Copy the text in the box next to it and paste that text into a text file or other location where you want to record your API endpoint URL.
6. Add the text '/xmlrpc.php' to the end of the text that you pasted. This is your API endpoint URL.
7. Test your work by copying the API endpoint URL and pasting it into your browser's address bar. You should receive a simple error message stating 'XML-RPC server accepts POST requests only.' This means your API endpoint URL is correct and your XML-RPC service is working.