# List collection accounts

Returns treasury prime accounts that can be used as collection accounts for invoices. Only returns open, unlocked accounts sorted with primary accounts first.

Endpoint: GET /billing/accounts
Version: 1.0.0
Security: apiKeyAuth

## Header parameters:

  - `x-entity-id` (string)
    Optional entity ID for scoped access to entity-specific data

## Response 200 fields (application/json):

  - `accounts` (array, required)
    List of available collection accounts for invoices

  - `accounts.id` (string, required)
    The account ID to use as collection_account_id when creating invoices

  - `accounts.display_name` (string, required)
    The display name of the account

  - `accounts.account_number_mask` (string, required)
    Masked account number showing only last 4 digits

  - `accounts.status` (string, required)
    The status of the account

  - `accounts.is_primary` (boolean, required)
    Whether this is the primary operational account

  - `accounts.banking_product` (string, required)
    The banking product type