# Working with REST APIs

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This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/amazon-api-gateway-developer-guide.git)
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## Monitor

* **Note**\
  API Gateway might not generate logs and metrics in the following cases:\
  413 Request Entity Too Large errors Excessive 429 Too Many Requests errors 400 series errors from requests sent to a custom domain that has no API mapping 500 series errors caused by internal failures API Gateway will not generate logs and metrics when testing a REST API method. The CloudWatch entries are simulated. For more information, see [Use the API Gateway console to test a REST API method](https://github.com/kevinslin/aws-reference-notes/blob/main/services/amazon_api_gateway/how-to-test-method.md).