Hi,   I am using the API in an automated script which nightly removes all contacts from a particular contact list, then repopulates it with new users based on our business logic, before re-scheduling a campaign which is designated to send email to only the contacts on the aforementioned list.   Seems great except if our business logic determines no users were to be added to the list, then I have an empty list, and when you schedule the campaign this way, it causes all kinds of problems. So, I added some code to:  - Query the API for the contact list yet again  - If the contact list has a contact_count == 0 then do not schedule the campaign   This is all in place, but I am still getting error messages that the campaign can't be scheduled because the contact list is empty and it's causing me a lot of problems. Is it possible that the API is returning false information, because I'm removing all users from the list and then just a few minutes later, re-populating that list? Any advice would be appreciated. Is there some other way of determining if a contact list is empty? ... View more

I'm working on a little script using the API. Everything was working fine yesterday, now today, if I call the getCampaignList function I get an error:   Invalid access token: <my-access-token>   Those values haven't changed. The access token works fine if I run it from the API tester, it even works fine if I run the same script from my local machine rather than on the server it's intended to run on. I checked this endpoint https://oauth2.constantcontact.com/oauth2/tokeninfo.htm and the token still doesn't expire for almost 10 years.   I verified on the server that the php curl extension is installed and working. I don't understand why it would have stopped working suddenly, and why it still works on a different machine. It's PHP version 5.4 on the server and 5.5 on my local box, but again, it worked a day ago so ...   Any tips at all on how to debug this from here? I am stumped. ... View more

Trying to use the API for a very niche purpose, and the approach I've been using so far just simply isn't working, so reaching out here to see if there's a better solution. What we're trying to do: We have a huge list of users as part of a science-based crowd sourcing program. We want to be able to monitor the conditions of our database, and when certain conditions are met, email a set of the users to whom the data is germane. This monitoring is to happen once daily, and each user may receive any number of emails over the course of the year, but they won't receive more than one email per day.   How I've been trying to accomplish this: I'm not super familiar with CC, but this seemed like the "right" approach - setup a list of users to email, the daily script then can depopulate that list, find the users for whom the day's data is relevant, repopulate the list, and then re-schedule the same "campaign" each day.   This doesn't work for a number of reasons, which may be obvious to most, but I've stumbled into. One, you can't email the same campaign to the same user twice. So if user A is slated to get the email today and again in one week, they will only get it the first time. Two, if a user decides they don't want to be a part of this program any longer, and they attempt to unsubscribe themself from the list, there's a possibility they may get re-added to the list in the future.   I guess what I really need is:  - a way through CC API to email an arbitrary set of users  - someway to watch or track unsubscribe events, so I can manage a list of users to exclude from this effort.   Can anyone tell me if CC can provide a solution? It's certainly possible that I can do this outside of Constant Contact, but we really want to leverage all the value-added features of CC for this program we are running. Thank you! ... View more