SEO analyzer is showing this error API Error: HTTP 400 error.

Hello, we’re sorry to hear that you’re facing the API Error: HTTP 400 with the Rank Math SEO analyzer. This error typically indicates that the server is unable to process your API request due to a client error. Here are some common reasons and how to fix them:

1. Website Under Maintenance: If your website is under maintenance, it cannot be accessed. Make sure to switch your website back to normal mode.
   

2. Check Website Status: Ensure your website is returning a 200 status code. You can check the status of your website here. Enter your URL and click Check Status.
   

3. API Timeout: If your website takes more than 30 seconds to load, it may result in a timeout error.

4. API Requests Blocked by Firewall: Your server’s firewall might be blocking our API requests. You may need to whitelist the IP 46.30.211.100 and the user-agent RankMathApi/2.0.2; https://rankmath.com. You can do this in your firewall settings or ask your web hosting provider for assistance.

5. Locally Hosted Website: The SEO Analyzer module only works on live sites that return a 200 OK status when crawled from an external site. If your site is hosted locally, the SEO Analyzer will not function properly.
   

If you continue to experience issues after checking these points, please reply to this ticket with your website URL, and a human agent from our support team will assist you further.

Sources:
Why Am I Getting "API Error: HTTP 400" Error » Rank Math
Why Am I Getting "API Error: HTTP 400" Error » Rank Math

Hello,

We’ve checked your site using our External SEO Analyzer tool, and it is already working there:
https://rankmath.com/wordpress/plugin/seo-suite/

This can be fixed by whitelisting the IP 46.30.211.100 and the user-agent RankMathApi/2.0.7; https://rankmath.com. from your server.

Looking forward to helping you.