The active customer
Which customer this call is acting inside, and the role held in it. Confirms an X-Customer-Id you just sent; absent the header, it reports the default.
Autorizações
A contact session token, uk_ct_…. Belongs to one of the developer's own users, and reads only that user's data.
Cabeçalhos
The customer this call is acting inside — the same arrangement as X-Organization-Id, one plane down. Switching customers is navigation, not a mutation: nothing is stored, you send a different header, and the membership JOIN behind it decides what you may do there. An id you are not a member of matches no row and answers 404. Absent, the contact's oldest membership answers.
Resposta
The active customer.
A customer, as the contact who belongs to it sees it.