I want to make a sms service(sms API) on python I don't how can I make this to send sms to every where?
You can use SMS services as AWS SNS or as mention Twilio or many others actually, any of those are paid services. In order to build your own web service, first, you need to have the hardware to do it. As a basic recommendation, you can use raspberry pi and a GMS hat, code a python script to handle the ATT commands required to send SMSs, and then you can wrap everything with an awesome API using again, python, to create your cloud SMS sender API.