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OpenAPI Specification

openapi: 3.2.0
info:
  title: BILL v3 Authentication Funding Accounts 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: Funding Accounts
paths:
  /funding-accounts/banks:
    get:
      tags:
      - Funding Accounts
      summary: List bank funding accounts
      operationId: listBankFundingAccounts
      responses:
        '200':
          description: Bank funding accounts.
    post:
      tags:
      - Funding Accounts
      summary: Create a bank funding account (MFA required)
      operationId: createBankFundingAccount
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BankAccount'
      responses:
        '201':
          description: Created.
  /funding-accounts/banks/{bankAccountId}/verify:
    parameters:
    - name: bankAccountId
      in: path
      required: true
      schema:
        type: string
    post:
      tags:
      - Funding Accounts
      summary: Verify a bank funding account
      operationId: verifyBankFundingAccount
      responses:
        '200':
          description: Verification result.
components:
  schemas:
    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
  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.

        '