The WordPress 429 Too Many Requests error is activated when a user (or script) makes too many server requests. It’s a safety feature designed to protect your site from distributed denial of service (DDOS) attacks.
However, the error can be encountered when a misbehaving script or plugin runs on your site and makes repeated requests to the server. To troubleshoot and resolve the issue, you should deactivate all plugins on your site, then reactivate them one by one. Check the front end of your site following each reactivation to see if the issue reoccurs. If it does, the culprit is most likely to be the last plugin you activated.
Alternatively, the error may be caused by a poorly coded theme. As before, the easiest way to test this scenario is to switch your WordPress site to one of WordPress’ default themes. If the error does not subsequently appear, your original theme is likely to be at fault.
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