HTTP Error 429: Too Many Requests

1. Wait a few seconds and try again.
The easiest way to fix HTTP 429 error is to wait and send another request. 

2. Clear your browser cache.
If resending the request doesn’t help, try clearing your browser cache.

To do so in Chrome:

• Click CMD + Shift + Delete on Mac or Control + Shift + Delete on Windows.
• The “Clear browsing data” analog pop up.
• Click on the Advanced tab.
• Select the time range and the data you’d like to delete.
• Click Clear data.

3. Clear the DNS cache.
Your computer’s DNS cache stores queries to the domain name server so it can load websites faster the next time you access them. Unfortunately, this can result in an HTTP 429 error if you have made many requests before the DNS cache naturally expires.

4. Rename or move the default WordPress login page.
Sometimes HTTP 429 errors can occur due to cybersecurity attacks such as brute force attacks on your WordPress login page.

5. Deactivate the plugins one by one.
If the HTTP 429 error persists after the above points, it’s time to take a look at the next likely culprit: WordPress plugins.

6. Set your own throttling limit for any APIs.
An advanced method you can try is to set a throttling limit if you are using an API on your website. Throttling is the process of limiting the number of requests an application can send in a certain period of time. If this limit is exceeded, server or API requests are typically dropped or executed with cached data.

7. Contact your hosting provider.
You can always contact your hosting provider if there is any error on your website, maybe they can tell you what the problem might be.