---
title: "Add customer note"
method: POST
path: "/customer/add-note"
tags: ["Customer"]
---

# Add customer note

`POST /customer/add-note`

Use this BillingServ API endpoint to add customer note. Review the response for the operation result or validation errors.

## Request body

- object
  - `id` integer, required
  - `note` string, required

## Response `200`

OK

- ApiResponse
  - `success` boolean

## Other responses

- `401` — Missing or invalid API key
- `403` — Authenticated key does not have permission for this endpoint
- `404` — Customer not found or not accessible to this API account
- `422` — Validation error
- `500` — Customer note could not be saved

## Changes

- **2026-08-22** `6b9208b64456` — 8 info
  - added the non-success response with the status `404`
  - added the non-success response with the status `500`
  - added the optional property `code` to the response with the `401` status
  - added the optional property `code` to the response with the `403` status
  - …4 more

[Change history](https://skmtc.dev/b-cdn/apis/billingserv-api-v2/changes/customer/add-note/post.md)

---

[API](https://skmtc.dev/b-cdn/apis/billingserv-api-v2.md) · [All operations](https://skmtc.dev/b-cdn/apis/billingserv-api-v2/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/b-cdn/billingserv-api-v2/revisions/76cfbed5eb40/schema)