GET /onebox/threads returns a snippet per thread, this returns every message in the thread with its full body in both plain text and HTML.threadId from a GET /onebox/threads or GET /onebox/search result.GET /onebox/thread?userId=K5PF9Y068AMDGENV5BTCNJJZK55F&account=andrew.lawyer@aurumlawyer.com&threadId=1877937258181177440curl --location 'https://customers.coldmailreseller.com/api/v1/integration/onebox/thread?userId=K5PF9Y068AMDGENV5BTCNJJZK55F&threadId=1877937258181177440&account=andrew.lawyer%40aurumlawyer.com' \
--header 'cmr-x-api-key: <api-key>'{
"status": 200,
"message": "Thread fetched",
"data": [
{
"account": "andrew.lawyer@aurumlawyer.com",
"provider": "gmail",
"threadId": "1877937258181177440",
"messageId": "<Lml2fGwaDix-AGNfQXWUqg@notifications.google.com>",
"subject": "Security alert",
"date": "2026-10-02T11:28:49.000Z",
"labels": [
"UNREAD",
"CATEGORY_UPDATES",
"INBOX"
],
"from": [
{
"name": "Google",
"address": "no-reply@accounts.google.com"
}
],
"to": [
{
"name": "string",
"address": "andrew.lawyer@aurumlawyer.com"
}
],
"body": {
"plain": "[image: Google]\r\nAuthenticator app added as sign-in step",
"html": "<div>Authenticator app added as sign-in step</div>"
},
"hasAttachments": false,
"isRead": false,
"isStarred": false,
"folderPath": "inbox"
}
]
}