Hi.
Yes, there is. You can POST to the api endpoint
springpad.com/api/users/{username or "me"}/following/users with the data of the user you wish to follow. The payload is json like this:
{
"user":{user uuid or username}
}
To be clear, the data in the post is the user to be followed. The user in the request uri (or me) is the user doing the following.
I hope this helps.
Regards,
Chuck