Hello,
We apologize for the issue you are facing while trying to index from Instant Indexing. The error message you provided indicates a critical error on your website with a status code 500.
A 500 Internal Server Error usually means there is an issue with the server that hosts your website. This could be due to various reasons such as misconfigurations, plugin conflicts, or server-side issues.
To troubleshoot this error, we recommend the following steps:
-
Check Website Status: Ensure your website is returning a 200 status code. You can use a tool like httpstatus.io to check the status of your website.

-
Server Error (5xx): If your server is returning a 500-level error, you should investigate the server logs and fix any server-side issues.
-
Redirect Error: Check for any redirect errors that might be causing the issue.
-
API Requests Blocked by Firewall: Ensure that our API requests are not being blocked by your server’s firewall. You may need to whitelist the IP 193.138.6.5
and the user-agent RankMathApi/2.0.2; https://rankmath.com
.
If after following these steps you are still facing issues, please feel free to reach out to our support team directly for further assistance.
We appreciate your understanding and patience as we work to resolve this issue for you.
Sources:
Why Am I Getting “API Error: HTTP 400” Error » Rank Math
Why Am I Getting “API Error: HTTP 400” Error » Rank Math
Google URL Inspection API Integration in Rank Math
How to Fix 429 Error with IndexNow API » Rank Math
Hello,
We have already replied to your other ticket with the same concern, and please continue there to avoid duplication.
I’ll close this one so we can follow up on one thread for efficiency.
Looking forward to helping you.
Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.