Hi,
please correct me if I misunderstood you. You plan to sell your SaaS product on the AWS Marketplace and your software is fronted by an AWS API Gateway? If so, have a look at the documentation here and a very detailed answer with a step by step guide here.
AWS公式更新しました 10ヶ月前
Yes you're correct. I'll refer this link. https://repost.aws/questions/QUFp6FrY1nTwyo_yL5QZNBaA/as-a-seller-how-do-i-integrate-aws-api-gateway-with-my-aws-marketplace-saas-listing