A fourth step is to validate and monitor the changes in your rate limit headers, before and after deploying them. You should test your API with different scenarios and clients, and check if the headers are sent and received correctly. You should also monitor the performance and usage of your API, and look for any anomalies or issues that might indicate a problem with the rate limit headers. You can use tools like Postman, Curl, or API testing frameworks to validate your headers, and tools like Google Analytics, Prometheus, or API management platforms to monitor your API. By doing this, you can ensure that your changes are working as intended, and fix any bugs or errors quickly.