---
title: "List invoice customers"
method: GET
path: "/invoice-customers"
tags: ["Invoicing"]
---

# List invoice customers

`GET /invoice-customers`

## Request

- Base URL: `https://api.app.lastaccountingcompany.com/portal`
- URL: `https://api.app.lastaccountingcompany.com/portal/invoice-customers`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/lastaccountingcompany/apis/lac-customer-api/docs/invoice-customers/get.ts> (a function with typed inputs; its response is checked against the schema)

Lists the invoicing counterparty register — the parties you invoice, with their e-invoice addresses and per-party defaults.

## Query parameters

- `customer_id` string

## Response `200`

Invoice customers.

- object
  - `customer_id` string
  - `customers` Party[]
    - `id` string: Party id. Include on upsert to update an existing party.
    - `name` string, required
    - `business_id` string: Finnish business ID (Y-tunnus), e.g. `1234567-8`.
    - `vat_number` string: EU VAT number, e.g. `FI12345678`.
    - `address_line1` string
    - `postal_code` string
    - `city` string
    - `country_code` string: ISO 3166-1 alpha-2, e.g. `FI`.
    - `email` string
    - `einvoice_address` string: E-invoice (verkkolasku) address, e.g. an OVT identifier.
    - `einvoice_operator` string: E-invoice operator/intermediator code.
    - `default_payment_terms_days` integer
    - `default_vat_code` string
    - `default_vat_rate_basis_points` integer: Default VAT rate in basis points (25.5% = 2550).
    - `default_invoice_language` string

## Other responses

- `401`: Missing or invalid bearer token.
- `403`: Insufficient scope or role — e.g. a read-scoped key on a mutating method, or an API key on an admin/approver-only endpoint.

---

[API](https://skmtc.dev/lastaccountingcompany/apis/lac-customer-api.md) - [All operations](https://skmtc.dev/lastaccountingcompany/apis/lac-customer-api/llms.txt) - [OpenAPI document](https://skmtc.dev/lastaccountingcompany/apis/lac-customer-api/revisions/52e277b4f031?raw)