Exporting api definition from AWS API Gateway

this feature is now available via CLI directly from Amazon. It produces the same output as Amazon's gui console.

swagger

aws apigateway get-export --rest-api-id a1b2c3d4e5 --stage-name dev
--export-type swagger /path/to/filename.json

swagger + api gateway extensions

aws apigateway get-export --parameters extensions='integrations'
--rest-api-id a1b2c3d4e5 --stage-name dev --export-type swagger /path/to/filename.json

swagger + postman extensions

aws apigateway get-export --parameters extensions='postman'
--rest-api-id a1b2c3d4e5 --stage-name dev --export-type swagger /path/to/filename.json

For details: http://docs.aws.amazon.com/cli/latest/reference/apigateway/get-export.html

I've just published a tool for exporting existing APIs from Amazon API Gateway:

Amazon API Gateway Swagger Exporter

https://github.com/isabinin/aws-apigateway-swagger-exporter

Hopefully you'll find it useful.

Open CLI and run following command

aws apigateway get-export --parameters extensions='apigateway' --rest-api-id **<aaaaabcdefg123>** --stage-name dev --export-type swagger latestswagger2.json

or

Go to stage and export it