Monitoring REST APIs
In this section, you can learn how to monitor your API by using CloudWatch metrics, CloudWatch Logs, Firehose, and AWS X-Ray. By combining CloudWatch execution logs and CloudWatch metrics, you can log errors and execution traces, and monitor your API's performance. You might also want to log API calls to Firehose. You can also use AWS X-Ray to trace calls through the downstream services that make up your API.
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.
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