Get All Notes for a ticket

Developer Support APIs & Integrations
9

Try this works my end

//https://api.hubapi.com/crm/v3/objects/notes/search

{
 "filterGroups": [
 {
 "filters": [
 {
 "propertyName": "associations.ticket",
 "operator": "EQ",
 "value":"YOUR TICKET ID"
 }
 ]
 }
 ],
 "properties": ["hs_note_body"]
}