I understand the process clearly. Pleas allow me to convince you this problem is real, and a good solution is not available to us: Try to build a simple LANDING PAGE in standalone PHP that hooks up to Google Ads. 3 custom fields for Constant Contact needed: "Project type, Budget, State" Add a checkbox that says "subscribe to our mailing list" No database. no CMS. nothing fancy. Just a PHP form and a landing page. Then, watch someone try to build it and connect it to V3 of the API Record that process. Try it your self. Have another developer try it. Don't show them how to do it. Let them try to make sense of the documentation. Watch. Listen. I think you will see the areas of improvement needed, and, why it is impossible to pull this off easily, efficiently and fast. By witnessing other people use this system things will quickly become apparent: 1- improvements to the documentation layer 2- why step 5 is unnecessary (and overly elaborate) The main challenge we face here is the "renewal" of the token. https://en.wikipedia.org/wiki/You_aren't_gonna_need_it YAGNI applies here - a principle of extreme programming (XP) that states a programmer should not add functionality until deemed necessary. Step 5 is not necessary. To do that we have to involve abstract elements of time, error checking, return error codes, saving the token, saving the time it was created, recreating it, CRON jobs, a database or writing to the file-system. This turns a 3 hour bang up job into weeks of development, writing classes, debugging and even then, the possibility exists that leads can be lost if something go's wrong. It's unnecessary for just trying to make a landing page to collect emails don't you think? We really need a more elegant solution. Can you look at this problem and do something effective for us? The simple answer is the right one here I think: let us generate and sign a token that does not expire to use our own CC list. Step 5 is not applicable to us, and does not help us, and is overly elaborate. It does not protect us, nor our data Step 5 is only a roadblock to us being able to use our own system as advertised and intended. In closing: I urge you to please try to build a simple PHP/HTML landing page that uses the V3 API yourself and watch someone else build one. The experience will reveal very important improvements that are desperately needed to make V3 a practical and useful utility.
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