openapi: 3.0.3
info:
  title: WM Customer Activities Invoices & Balance API
  description: 'Documented, partner/customer-gated REST API published by WM (formerly Waste Management, Inc.) at https://api.wm.com/. Exposes account-level service, billing, and support data - service and pickup information, live status/ETA, routing and hauling materials, pricing, invoices and balance, communication preferences, contacts, cases, tickets, and account activity notes. There is no self-serve signup: WM issues a ClientId and JSON Web Token (JWT) to approved commercial/enterprise customers and integration partners on request to apiaccess@wm.com. Endpoint paths, parameters, and response fields below are transcribed from WM''s published API documentation; fields not disclosed in that documentation are left as an open JSON object rather than invented.'
  version: '1.0'
  contact:
    name: WM API Access
    email: apiaccess@wm.com
    url: https://api.wm.com/
  license:
    name: Proprietary - partner/customer use per WM terms
servers:
- url: https://api.wm.com/v1
  description: Production
- url: https://apitest.wm.com/v1
  description: Test
security:
- bearerAuth: []
tags:
- name: Invoices & Balance
  description: Invoice history and account balance.
paths:
  /customers/{customerId}/invoices:
    get:
      operationId: listInvoices
      tags:
      - Invoices & Balance
      summary: List invoices
      description: Retrieve invoice history for the account - invoice id, date, amount, payment information, and remaining balance.
      parameters:
      - $ref: '#/components/parameters/CustomerId'
      responses:
        '200':
          description: Invoice history.
          content:
            application/json:
              schema:
                type: object
                properties:
                  currency:
                    type: string
                  invoices:
                    type: array
                    items:
                      $ref: '#/components/schemas/Invoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /customers/{customerId}/invoices/{invoiceId}:
    get:
      operationId: getInvoice
      tags:
      - Invoices & Balance
      summary: Get invoice details
      description: Retrieve details for a single invoice.
      parameters:
      - $ref: '#/components/parameters/CustomerId'
      - name: invoiceId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Invoice detail.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Invoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /customers/{customerId}/balance:
    get:
      operationId: getBalance
      tags:
      - Invoices & Balance
      summary: Get account balance
      description: Retrieve the balance due on the account, broken out by Current, 30/60/90/120-day, and Future aging buckets, plus the total balance, last payment amount, and last payment date.
      parameters:
      - $ref: '#/components/parameters/CustomerId'
      responses:
        '200':
          description: Account balance.
          content:
            application/json:
              schema:
                type: object
                properties:
                  currency:
                    type: string
                  last_payment_amount:
                    type: number
                  last_payment_date:
                    type: string
                    format: date
                  balances:
                    type: array
                    items:
                      type: object
                      properties:
                        type:
                          type: string
                          enum:
                          - Current
                          - 30Day
                          - 60Day
                          - 90Day
                          - 120Day
                          - Future
                          - Total
                        date:
                          type: string
                          format: date
                        amount:
                          type: number
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  responses:
    Unauthorized:
      description: Missing or invalid Authorization/ClientId.
      content:
        application/json:
          schema:
            type: object
            properties:
              message:
                type: string
  schemas:
    Invoice:
      type: object
      properties:
        id:
          type: string
        date:
          type: string
          format: date
        amount:
          type: number
        payment_info:
          type: object
          additionalProperties: true
        balance_amount:
          type: number
  parameters:
    CustomerId:
      name: customerId
      in: path
      required: true
      description: Unique customer account identifier.
      schema:
        type: integer
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: WM issues a JSON Web Token (JWT) and a ClientId to approved partners/customers. Send the token in the Authorization header and the ClientId in the ClientId header on every request.