I am not sure how to send signed http request do AppSync GraphQL endpoint. There is no library for do that in AWS. aws-amplify don’t work because works only in browser, not in Lambda function. aws-sdk for AppSync is only for admin usage, it doesn’t have methods for call user side api It is possible to make IAM signed HTTP request from AWS Lambda? (in some easy way) Answer i would recommend reading this article: Backend GraphQL: How to trigger an AWS AppSync mutation from AWS Lambda, quoting the author, https://stackoverflow.com/users/1313441/adrian-hall, we’ve: GraphQL is routed over HTTPS. That means we