Hi @Egoi ,
You are looking for the association label to be specific.
If you retrieve the deal using the ‘read’ endpoint, you can retrieve the associated objects as well, for example;
https://api.hubapi.com/crm/v3/objects/deals/{dealId}?associations=contacts
will return something like;
"associations": {
"contacts": {
"results": [
{
"id": "<ID>",
"type": "label"
},
]
}
}
You can retrieve the association label from the “type” in this result.