# Working with HTTP APIs {% hint style="info" %} This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/amazon-api-gateway-developer-guide.git) {% endhint %} ## 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 --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://awsnotes.dendron.so/networking-and-content-delivery/amazon-api-gateway/topics/working-with-http-apis.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.