generated: '2026-07-20'
method: searched
source: https://developers.perk.com/reference
name: Perk Data Model
type: DataModel
description: >-
  Entity-relationship sketch derived from the Perk API object reference (Invoice,
  InvoiceProfile, InvoiceLine, Trip, Booking, User, CostCenter). Perk is the merchant of
  record; invoices are issued on an invoice profile.
entities:
- name: InvoiceProfile
  ref: https://developers.perk.com/reference/the-invoiceprofile-object
  description: The legal entity a trip is invoiced to; holds billing preferences.
- name: Invoice
  ref: https://developers.perk.com/reference/the-invoice-object
  description: Legal document issued by Perk (merchant of record) to an invoice profile.
- name: InvoiceLine
  ref: https://developers.perk.com/reference/the-invoiceline-object
  description: A single booked service on an invoice (flight, hotel, car) with quantity, unit price, taxes.
- name: Trip
  ref: https://developers.perk.com/reference/retrieve-a-trip-by-id
  description: A travel trip with travelers and bookings.
- name: Booking
  description: A booked service within a trip (flight, hotel, train, car), with legs/segments for transport.
- name: User
  ref: https://developers.perk.com/reference/user-schema
  description: A user within a Perk account (also the SCIM User resource).
- name: CostCenter
  ref: https://developers.perk.com/reference/cost-centers
  description: Groups expenses by department/project; has assigned users, an approver, and a delegate.
relationships:
- from: Invoice
  type: belongs_to
  to: InvoiceProfile
  via: profile_id
- from: Invoice
  type: has_many
  to: InvoiceLine
  via: lines
- from: InvoiceLine
  type: belongs_to
  to: Trip
  via: metadata.trip_id
- from: Trip
  type: has_many
  to: Booking
  via: bookings
- from: Trip
  type: has_many
  to: User
  via: travelers
- from: CostCenter
  type: has_many
  to: User
  via: users
- from: CostCenter
  type: has_one
  to: User
  via: approver_id