For WordPress.com hosted sites (i.e. sites that have a something.wordpress.com URL), Akismet is included by default and at no charge. If you downloaded WordPress from WordPress.org and are running the software on your own server, then you’re in the right place.
Keep in mind that you need to be a site Administrator in order to view or make any modifications to the Akismet plugin settings page.
To locate your Akismet API key, you’ll first need to login to your WordPress Dashboard, which is typically something like
https://yoursite.com/wp-admin/ Once logged in, click on the “Plugins” link in the left side navigation:
Next, click on the “Settings” link below the Akismet plugin:
This should bring you to the Akismet configuration screen, where your API key will be displayed (I’ve redacted the key in this screenshot) in this box: