Nookal Invoices API

openapi: 3.2.0
info:
  title: Nookal Appointments Invoices API
  description: 'REST API for Nookal, Australian-built practice management software for allied health clinics. The API exposes patients, cases, treatment notes, files, appointments, class bookings, availabilities, clinic reference data (locations, practitioners, appointment/class types, stock), and invoices.


    Base URL: https://api.nookal.com/production/v2/. All requests are authenticated with an account-issued API key passed as the `api_key` parameter (query string for GET requests, form field for POST requests). Responses are JSON using a common envelope: `{"status":"success"|"failure","data":{...},"details":{...}}`. On failure, `details` carries `errorMessage`, `errorCode`, and an `alerts` array. Read endpoints are paginated via `page` and `page_length`, and the response `details` object reports `totalItems`, `currentItems`, `currentPage`, and `nextPage`.


    Endpoint paths, methods, and parameters are grounded in Nookal''s public API reference (https://api.nookal.com/dev). The `verify`, `getLocations`, and `getPatients` surfaces were confirmed live against the production host; the `api_key` requirement is confirmed by live probes. Request and response body schemas below are MODELED from the documented object reference and the live JSON envelope, not copied from a machine-readable Nookal specification (Nookal does not publish one), so field-level shapes should be verified against a live account before production use.'
  version: v2
  contact:
    name: Nookal
    url: https://www.nookal.com
  termsOfService: https://www.nookal.com/terms
servers:
- url: https://api.nookal.com/production/v2
  description: Nookal production API (v2)
security:
- apiKeyQuery: []
tags:
- name: Invoices
  description: Invoices and their items, payments, credits, discounts, and refunds.
paths:
  /getInvoices:
    post:
      operationId: getInvoices
      tags:
      - Invoices
      summary: Get invoices
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - api_key
              properties:
                api_key:
                  type: string
                patient_id:
                  type: string
                last_modified:
                  type: string
                void:
                  type: boolean
                expanded:
                  type: boolean
      responses:
        '200':
          description: A status envelope whose data contains invoices.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Envelope'
  /getInvoice:
    post:
      operationId: getInvoice
      tags:
      - Invoices
      summary: Get a single invoice
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - api_key
              - invoice_id
              properties:
                api_key:
                  type: string
                invoice_id:
                  type: string
                void:
                  type: boolean
      responses:
        '200':
          description: A status envelope containing the requested invoice.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Envelope'
  /addInvoice:
    post:
      operationId: addInvoice
      tags:
      - Invoices
      summary: Add an invoice
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - api_key
              - location_id
              - patient_id
              - date
              properties:
                api_key:
                  type: string
                location_id:
                  type: string
                patient_id:
                  type: string
                date:
                  type: string
                  format: date
                invoice_notes:
                  type: string
                account_notes:
                  type: string
                items:
                  type: string
                  description: Serialized line items (see Nookal invoice object reference).
                payments:
                  type: string
                  description: Serialized payments (see Nookal invoice object reference).
                case_id:
                  type: string
                practitioner_id:
                  type: string
      responses:
        '200':
          description: A status envelope containing the created invoice.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Envelope'
  /addPaymentToInvoice:
    post:
      operationId: addPaymentToInvoice
      tags:
      - Invoices
      summary: Add a payment to an invoice
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - api_key
              - invoice_id
              - method
              - amount
              - date
              properties:
                api_key:
                  type: string
                invoice_id:
                  type: string
                method:
                  type: string
                amount:
                  type: string
                date:
                  type: string
                  format: date
                payment_ref:
                  type: string
      responses:
        '200':
          description: A status envelope confirming the payment.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Envelope'
  /getInvoicePayments:
    post:
      operationId: getInvoicePayments
      tags:
      - Invoices
      summary: Get invoice payments
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - api_key
              properties:
                api_key:
                  type: string
                invoice_id:
                  type: string
                date_from:
                  type: string
                  format: date
                date_to:
                  type: string
                  format: date
      responses:
        '200':
          description: A status envelope whose data contains invoice payments.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Envelope'
components:
  schemas:
    Envelope:
      type: object
      description: Standard Nookal JSON response envelope. On success, status is "success" and data carries the results object; on failure, status is "failure" and details carries errorMessage, errorCode, and alerts. Shape confirmed live against the verify and getLocations endpoints.
      properties:
        status:
          type: string
          enum:
          - success
          - failure
        data:
          type: object
          additionalProperties: true
          description: Result payload on success (structure varies per endpoint).
        details:
          $ref: '#/components/schemas/Details'
    Details:
      type: object
      properties:
        errorMessage:
          type: string
        errorCode:
          type: string
        alerts:
          type: array
          items:
            type: string
        totalItems:
          type: integer
        currentItems:
          type: integer
        currentPage:
          type: integer
        nextPage:
          type: integer
        pageLength:
          type: integer
  securitySchemes:
    apiKeyQuery:
      type: apiKey
      in: query
      name: api_key
      description: 'Account-issued API key created in the Nookal application under Setup / Integrations, with a configurable access level. Passed as the `api_key` parameter - in the query string for GET requests and as a form field for POST requests. Confirmed live: omitting it returns a failure envelope with alert "Missing variable: api_key".'