Create an OAuth app
Registers a new OAuth application owned by the authenticated caller, validating the supplied client metadata (redirect URIs must be https or http loopback with no fragment, scopes must be known capability scopes). Returns the created app including its client_id and, for confidential clients, a client_secret, plus a registration_access_token used for later RFC 7592 management; the secret and registration token are shown only once and cannot be retrieved again. Each account is limited in how many apps it may register.
Authorizations
Personal Access Token. Send as Authorization: Bearer hq_pat_....
Body
Response
The created app (secret + registration token shown once)
The RFC 7592 management bearer; shown ONCE.
Present only for confidential clients; shown ONCE, never retrievable.