openapi: 3.1.0
info:
  title: BILL v3 Authentication Vendors API
  description: 'REST API providing access to BILL''s Accounts Payable, Accounts Receivable,

    and Spend & Expense capabilities — bills, invoices, vendors, customers,

    payments, funding accounts, organizations, webhooks, and authentication

    workflows.


    Best-effort OpenAPI reconstruction from BILL''s public developer portal at

    https://developer.bill.com/docs/home. Authoritative reference and Postman

    collection live under https://developer.bill.com/reference and

    https://developer.bill.com/llms.txt.

    '
  version: 3.0.0
  contact:
    name: BILL Developer Portal
    url: https://developer.bill.com/docs/home
  license:
    name: Proprietary
servers:
- url: https://gateway.prod.bill.com/connect/v3
  description: BILL production gateway (Connect v3)
- url: https://gateway.stage.bill.com/connect/v3
  description: BILL sandbox gateway (Connect v3)
- url: https://api.bill.com/v3
  description: BILL production API
- url: https://api-sandbox.bill.com/v3
  description: BILL sandbox API
security:
- sessionAuth: []
tags:
- name: Vendors
paths:
  /vendors:
    get:
      tags:
      - Vendors
      summary: List vendors
      operationId: listVendors
      parameters:
      - $ref: '#/components/parameters/Max'
      - $ref: '#/components/parameters/Page'
      responses:
        '200':
          description: Vendors.
    post:
      tags:
      - Vendors
      summary: Create a vendor
      operationId: createVendor
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/VendorCreate'
      responses:
        '201':
          description: Created vendor.
  /vendors/{vendorId}:
    parameters:
    - name: vendorId
      in: path
      required: true
      schema:
        type: string
    get:
      tags:
      - Vendors
      summary: Retrieve a vendor
      operationId: getVendor
      responses:
        '200':
          description: Vendor.
    patch:
      tags:
      - Vendors
      summary: Update a vendor
      operationId: updateVendor
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/VendorCreate'
      responses:
        '200':
          description: Updated vendor.
  /vendors/{vendorId}/bank-account:
    parameters:
    - name: vendorId
      in: path
      required: true
      schema:
        type: string
    post:
      tags:
      - Vendors
      summary: Add a vendor bank account
      operationId: addVendorBankAccount
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BankAccount'
      responses:
        '201':
          description: Added.
components:
  schemas:
    Address:
      type: object
      properties:
        line1:
          type: string
        line2:
          type: string
        city:
          type: string
        stateOrProvince:
          type: string
        zipOrPostalCode:
          type: string
        country:
          type: string
    BankAccount:
      type: object
      required:
      - routingNumber
      - accountNumber
      - accountType
      properties:
        routingNumber:
          type: string
        accountNumber:
          type: string
        accountType:
          type: string
          enum:
          - CHECKING
          - SAVINGS
        nameOnAccount:
          type: string
        verified:
          type: boolean
    VendorCreate:
      type: object
      required:
      - name
      properties:
        name:
          type: string
        accountNumber:
          type: string
        email:
          type: string
          format: email
        phone:
          type: string
        address:
          $ref: '#/components/schemas/Address'
        taxId:
          type: string
        taxIdType:
          type: string
        track1099:
          type: boolean
        currency:
          type: string
  parameters:
    Max:
      name: max
      in: query
      schema:
        type: integer
        default: 100
        maximum: 999
    Page:
      name: page
      in: query
      schema:
        type: string
  securitySchemes:
    sessionAuth:
      type: apiKey
      in: header
      name: sessionId
      description: 'Session identifier obtained from `POST /login`. Expires after 35 minutes

        of inactivity. A `devKey` (developer key) is also required on requests

        and is sent alongside `sessionId` in the appropriate header per BILL''s

        official reference.

        '