# Working with HTTP 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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## Develop

* **Note**\
  To invoke a Lambda integration, API Gateway must have the required permissions. You can use a resource-based policy or an IAM role to grant API Gateway permissions to invoke a Lambda function. To learn more, see [AWS Lambda Permissions](https://docs.aws.amazon.com/lambda/latest/dg/lambda-permissions) in the \* AWS Lambda Developer Guide\*.

## 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