I have created API using AWS Api Gateway. Then i have documented documentation parts for all the entities ( like API, RESOURCE, METHOD, MODEL etc). Then using AWS Gateway Co
AWS API Gateway can only make documentation exportable but won't render a UI app. There is no endpoint that you can use in the gateway to render the documentation. You may wish to use third party tools or AWS API Gateway Developer Portal to allow users browse API documentation. You may find this blog helpful.
you can try https://www.npmjs.com/package/micro-swagger
npm i -g micro-swagger
micro-swagger start