如果在某种身份验证之后进行API调用，那么它是否安全？

I'm making a couple of API calls using JQuery. The first call is for authentication and I receive a token that can be used for the next call. This first call is made over HTTPS but would like to make the second call over HTTP. Will this second call over HTTP be secure since I'm already authenticated?I'm making a couple of API calls using JQuery.