How to automatically populate Yoast Focus Keyphrase and Keyphrase Synonyms | CyberSEO Pro | CyberSEO support forum

The Focus Keyphrase field is basically just an internal calculator for your WordPress dashboard. It doesn't add any meta tags to your HTML, and Google never sees it. If you get Claude to extract a key phrase from an article it just wrote and then you put that same phrase into Yoast, you'll end up with a closed loop and a green light score. Yoast will grade the text against a word it generates, which makes it seem like it's got good SEO, but it doesn't actually help your search engine rankings. The only AI-generated fields that matter to Google are your title and meta description.

You cannot use those shortcodes in the "Custom fields" settings box (details: https://www.cyberseo.net/content-syndicator/#custom-fields). The way CyberSEO Pro works is that custom fields are always processed before the content of a post is actually created (details: https://www.cyberseo.net/cyberseo-pro-workflow/).

If you don't mind spending API tokens to generate a keyphrase that nobody will ever see except for the Yoast SEO plugin inside your WordPress editor, there is a working solution. To do this, you need to use the "Custom PHP code" box. This box is located under the Expert tab in your feed settings. Just paste the following code there:

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Note that Yoast SEO expects to see exactly one specific keyword phrase in that field, so a list of keywords separated by commas will not work correctly.

Regarding your question about Yoast Keyphrase synonyms, this is a feature that only Yoast SEO Premium has. Its only purpose is to help the internal Yoast content analysis tool recognize different versions of words. For example, if your focus keyphrase is "frozen blueberries," adding "frozen mixed berries" as a synonym tells the Yoast calculator to count both phrases when grading your text in the WordPress editor.

Just like the main focus keyphrase, these synonyms are never shown on your website's front page or in search engine results, like Google. They exist purely to help the Yoast traffic light turn green. When it comes to autoblogging, it doesn't make much sense to generate and save synonyms. Since the posts are published automatically, nobody is manually opening each post in the WordPress editor to check the SEO score anyway. It basically uses API tokens to fill a hidden dashboard grading tool.

If you still want to use this, you should know that Yoast Premium does not store synonyms as plain text. It saves them in a special order in a special section of the Yoast SEO database. You can't just put a text string from Claude into that field. You would need to write extra PHP code in the "Expert" tab to catch the AI-generated synonyms, encode them into the exact JSON structure that Yoast Premium expects, and then assign them to the post meta array.