AWS Secrets Manager

https://console.aws.amazon.com/secretsmanager/home?region=us-east-1#!/home 

https://docs.aws.amazon.com/secretsmanager/latest/userguide/tutorials_basic.html

https://aws.amazon.com/secrets-manager/pricing/

AWS Secrets Manager has a pricing

PER SECRET PER MONTH     $0.40 per secret per month.

PER 10,000 API CALLS           $0.05 per 10,000 API calls.