First of all install chalice (pip install chalice)

To run it just run:

> chalice deploy

you'll see something like this:

Creating Rest API
Resources deployed:
  - Lambda ARN: arn:aws:lambda:me-south-1:SOMENUMBER:function:appname-dev-func
  - Lambda ARN: arn:aws:lambda:me-south-1:SOMENUMBER:function:appname-dev
  - Rest API URL: https://VALUE.execute-api.me-south-1.amazonaws.com/api/

then just

> curl -X GET https://VALUE.execute-api.me-south-1.amazonaws.com/api/

to get response from the lambda