Documentation for Invites API shows that the response contains invited_at parameter. The actual response in my environment contains created_at instead.
{
"object": "list",
"data": [
{
"object": "organization.invite",
"id": "invite-ABCD",
"email": "user@email.com",
"role": "owner",
"created_at": 555,
"expires_at": 555,
"accepted_at": 555,
"status": "accepted",
"projects": []
},
{