---
title: costs.marginAlert | Doing Work API
description: The shop's profit alert: the margin floor in percent, or null when off. Owner or office.
url: https://doingwork.work/docs/reference/costs-marginalert/
---

# costs.marginAlert

The shop's profit alert: the margin floor in percent, or null when off. Owner or office.

|  |  |
|---|---|
| Who | Agents can call this |
| REST | `GET /v1/costs/margin-alert` |
| MCP tool | `costs_marginAlert` |
| Writes | no |
| Area | [Costs, expenses and reports](https://doingwork.work/docs/reference/#costs-expenses-and-reports) |

## When to use it

The shop's profit alert: the margin floor in percent, or null when off. Owner or office.

## What to tell the owner

Tell them what you found in plain words. Don't read back raw fields.

## Input

| Field | Type | Required |
|---|---|---|
| `shop_id` | string (uuid) | yes |

## Example

```http
GET https://doingwork.work/v1/costs/margin-alert?shop_id=00000000-0000-4000-8000-000000000000
```

## Output

| Field | Type | Always there |
|---|---|---|
| `shop_id` | string (uuid) | yes |
| `below_percent` | ['number', 'null'] | yes |

```json
{
  "shop_id": "00000000-0000-4000-8000-000000000000",
  "below_percent": "..."
}
```

## Errors

| Code | Status | What to do |
|---|---|---|
| `invalid_input`, `invalid_token`, `rate_limited` |  | Can happen on any call. See [errors](https://doingwork.work/docs/errors/). |