I have been looking for a way to query for optouts through the API, without any luck so far. Has anyone done this?

What did you try ? Because a lot of people use API without issue.

Thanks for the response, Denis. That's great news. It's likely a lack of understanding of the API. What API call should I use to get opt-out information? I checked export_responses and list_participants.

list_partcipants completed state mus shown Q if i remind.

Close, Denis. It was in 'emailstatus' attribute. Here is the input body I used:

{
"jsonrpc":"2.0",
"id","method":"list_participants",
"params":{
"sSessionKey" : "<session key>",
"iSurveyID" : "<survey id>",
"bUnused" : "",
"iStart" : "0",
"iLimit" : "10000",
"aAttributes": ["emailstatus"]
}
}

Thanks for the help!

Oups … Optout not quota out …
Sorry …