---
title: "AT Communication"
method: POST
path: "/api/v3/accounts/at_communication.json"
tags: ["Accounts"]
---

# AT Communication

`POST /api/v3/accounts/at_communication.json`

## Query parameters

- `api_key` string, required

## Request body

- AtCommunicationRequest
  - `at_communication` object, required
    - `at_subuser` string, required
    - `at_password` string, required
    - `communication_type` 'auto' | 'manual' | 'guides' | 'portal_at', required

## Response `200`

SUCCESS

- AtCommunicationSuccess
  - `success` boolean

## Other responses

- `401` — ACCESS DENIED
- `422` — UNPROCESSABLE ENTITY

## Changes

- **2026-08-25** `5b82d4eb0d9f` — 3 breaking, 4 warning
  - the `errors` response's property type/format changed from `object`/`` to `array`/`` for status `401`
  - the `errors` response's property type/format changed from `object`/`` to `array`/`` for status `422`
  - the `success` response's property type/format changed from `string`/`` to `boolean`/`` for status `200`
  - the `at_communication/at_password` request property's maxLength was set to `255`
  - …3 more

[Change history](https://skmtc.dev/invoicexpress/apis/invoicexpress-api/changes/api/v3/accounts/at_communication.json/post.md)

---

[API](https://skmtc.dev/invoicexpress/apis/invoicexpress-api.md) · [All operations](https://skmtc.dev/invoicexpress/apis/invoicexpress-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/invoicexpress/invoicexpress-api/revisions/59bc808e8784/schema)