I can give you one by reusing a bit the Telegraph example I have in the Jo tutorial: http://fmontesi.github.io/2018/08/16/jo.html

To create an account:

Jo.createAccount( { shortName: "Homer" } ) .then( response => { alert( response.result.accessToken ); } );

To create a page:

Jo.createPage( { accessToken: token, title: "Title", content: "Content" } ) .then( response => { alert( response.result.url ); } );

This assume that those operations are available at the originating web server. If instead you're offering "Telegraph" as a subservice, then instead of Jo you have to write Jo("Telegraph"), the rest is the same.

I hope this clarifies things a bit.