---
title: "Update a customer · Customers · COUNT Partner API"
description: "Updates an existing customer. Only the fields you send are changed. PUT /partners/customers/{uuid}"
canonical: "https://developers.getcount.com/reference/customers/update-customer"
source: "https://developers.getcount.com/reference/customers/update-customer"
---
[Customers](https://developers.getcount.com/reference/customers) / Update a customer

# Update a customer

PUT `/partners/customers/{uuid}`

Updates an existing customer. Only the fields you send are changed.

Send any subset of the writable fields. Fields belonging to firm-managed (system-created) customers, and internal fields such as originalClientId, are ignored.

HMAC signature + Bearer access token

[Try this request](https://developers.getcount.com/tools/try-it?method=PUT&path=%2Fpartners%2Fcustomers%2F%7Buuid%7D&body=%7B%0A++%22mainPhone%22%3A+%22%2B1987654321%22%2C%0A++%22status%22%3A+%22inactive%22%0A%7D)

[Invoices API](https://developers.getcount.com/reference/invoices) [Projects API](https://developers.getcount.com/reference/projects) [Recurring Invoice Templates API](https://developers.getcount.com/reference/recurring-invoice-templates)

#### Path parameters

`uuid` uuid required

The customer UUID to update.

#### Request body

`customer` string

Updated customer or business name.

`email` string

Updated email.

`mainPhone` string

Updated phone number.

`website` string

Updated website URL.

`notes` string

Updated notes.

`status` enum

Updated status.

One of: `active`, `inactive`

`paymentTerm` string

Updated payment term.

`billingAddress` object

Updated billing address.

`shippingAddress` object

Updated shipping address.

`contacts` array

Updated list of contacts.

#### Responses

`200` Customer updated successfully.

`404` Customer not found.

`401` Missing or invalid HMAC signature, expired timestamp, or invalid Bearer token. [Troubleshoot](https://developers.getcount.com/getting-started/errors#error-401)

`403` The credential does not have access to this workspace or resource. [Troubleshoot](https://developers.getcount.com/getting-started/errors#error-403)

`429` Rate limit exceeded (100 requests per minute per clientId). Retry after the Retry-After header. [Troubleshoot](https://developers.getcount.com/getting-started/errors#error-429)

[Previous POST Add a customer](https://developers.getcount.com/reference/customers/add-customer) [Next POST Bulk create customers](https://developers.getcount.com/reference/customers/bulk-create-customers)

PUT `https://api.getcount.com/partners/customers/{uuid}`

Request

```javascript
import crypto from 'node:crypto';

const BASE_URL = 'https://api.getcount.com';
const CLIENT_ID = process.env.COUNT_CLIENT_ID;
const CLIENT_SECRET = process.env.COUNT_CLIENT_SECRET;
const ACCESS_TOKEN = process.env.COUNT_ACCESS_TOKEN;

const method = 'PUT';
const signingPath = '/customers/3fa85f64-5717-4562-b3fc-2c963f66afa6';
const timestamp = Math.floor(Date.now() / 1000).toString();
const body = {
  "mainPhone": "+1987654321",
  "status": "inactive"
};
const bodyString = JSON.stringify(body);

const bodyHash = crypto.createHash('sha256').update(bodyString).digest('hex');
const baseString = `${method}:${signingPath}:${timestamp}:${bodyHash}`;
const signature = crypto.createHmac('sha256', CLIENT_SECRET).update(baseString).digest('hex');

const response = await fetch(`${BASE_URL}/partners/customers/3fa85f64-5717-4562-b3fc-2c963f66afa6`, {
  method,
  headers: {
    'x-client-id': CLIENT_ID,
    'x-timestamp': timestamp,
    'x-signature': signature,
    'Content-Type': 'application/json',
    Authorization: `Bearer ${ACCESS_TOKEN}`,
  },
  body: bodyString,
});

console.log(await response.json());
```

Response · 200

```json
{
  "status": "success",
  "message": "Success on updating a customer",
  "data": {
    "updatedCustomer": {
      "id": "dfa3219e-6af8-4c53-997a-037534f63a35",
      "customer": "Acme Corporation",
      "email": "contact@acme.com",
      "mainPhone": "+1234567890",
      "website": "https://acme.com",
      "status": "inactive",
      "notes": "Preferred customer. Net-30 terms.",
      "paymentTerm": "net30",
      "taxNumber": null,
      "taxAutoCalculate": false,
      "taxExcluded": false,
      "contactName": "John Doe",
      "billingAddress": {
        "id": "0b2c1f5e-7a9d-4f2b-9c1e-2a4b6d8e0f12",
        "street": "123 Main St",
        "city": "San Francisco",
        "state": "CA",
        "zipCode": "94102",
        "country": "USA"
      },
      "shippingAddress": null,
      "contacts": [
        {
          "id": "a5da3577-bf85-4e3a-aa73-df85ca69bc67",
          "firstName": "John",
          "lastName": "Doe",
          "email": "john@acme.com",
          "phone": "+1234567890",
          "isPrimary": true
        }
      ],
      "taxes": [],
      "salesRep": null,
      "createdAt": "2026-01-15T10:30:00.000Z",
      "updatedAt": "2026-01-28T14:22:30.000Z"
    }
  }
}
```