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

# Add customer note

`POST /customer/add-note`

## Request

- Base URL: `https://demo.onlinebillingform.com/api/v2`
- URL: `https://demo.onlinebillingform.com/api/v2/customer/add-note`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/billingserv/apis/billingserv-api-v2/docs/customer/add-note/post.ts> (a function with typed inputs; its response is checked against the schema)

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

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

---

[API](https://skmtc.dev/billingserv/apis/billingserv-api-v2.md) - [All operations](https://skmtc.dev/billingserv/apis/billingserv-api-v2/llms.txt) - [OpenAPI document](https://skmtc.dev/billingserv/apis/billingserv-api-v2/revisions/232ab5ca8413?raw)