# Update external ID

This endpoint updates the External ID value of a store. The External ID value is an optional field.

**PUT** `/proximity-integration/stores/{StoreID}/external_id`

## Request parameters

### Path

- `StoreID` (string, required)
  ID of the store.

- `external_id` (string, optional)
  Value of the external ID which will be linked to the store.

## Response parameters

- `id` (number, optional)
  ID that identifies the store.

- `user_id` (number, optional)
  ID that identifies the user who owns the store.

- `description` (string, optional)
  Name of the store.

- `business_hours` (object, optional)
  List of store opening hours. Each attribute of the object will be represented by a day of the week.

  - `business_hours.monday` (array, optional)
  List of store opening hours on that weekday.

  - `business_hours.monday[].open` (string, optional)
  Store opening time on that weekday.

  - `business_hours.monday[].close` (string, optional)
  Store closing time on that weekday.

  - `business_hours.tuesday` (array, optional)
  List of store opening hours on that weekday.

  - `business_hours.tuesday[].open` (string, optional)
  Store opening time on that weekday.

  - `business_hours.tuesday[].close` (string, optional)
  Store closing time on that weekday.

  - `business_hours.wendsday` (array, optional)
  List of store opening hours on that weekday.

  - `business_hours.wendsday[].open` (string, optional)
  Store opening time on that weekday.

  - `business_hours.wendsday[].close` (string, optional)
  Store closing time on that weekday.

  - `business_hours.thursday` (array, optional)
  List of store opening hours on that weekday.

  - `business_hours.thursday[].open` (string, optional)
  Store opening time on that weekday.

  - `business_hours.thursday[].close` (string, optional)
  Store closing time on that weekday.

  - `business_hours.friday` (array, optional)
  List of store opening hours on that weekday.

  - `business_hours.friday[].open` (string, optional)
  Store opening time on that weekday.

  - `business_hours.friday[].close` (string, optional)
  Store closing time on that weekday.

- `location` (object, optional)
  Store location information. This includes address, latitude, longitude, and additional location references.

  - `location.address_line` (string, optional)
  Store address information.

  - `location.reference` (string, optional)
  Store location add-on.

  - `location.latitude` (number, optional)
  Latitude of the store.

  - `location.longitude` (number, optional)
  Longitude of the store.

- `external_id` (string, optional)
  This optional property indicates the custom external ID of the store. This value can be changed or updated using the endpoint that updates External IDs.

## Errors

| Status | Error | Description |
| ------- | ------- | ----------- |
| 400 | 400 | Missing_Parameter - Invalid store id |
| 401 | 401 | Unauthorized - Access Token is invalid |
| 403 | 403 | Forbidden - User cannot access this resource |
| 424 | 424 | Not Found - Failed to get some information of the store |
| 500 | 500 | Internal server error |

## Request example

### cURL

```bash
curl -X PUT \
  'https://api.mercadopago.com/proximity-integration/stores/{StoreID}/external_id' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer <ACCESS_TOKEN>' \
  -d '{
  "external_id": "9320001PC21"
  }'
```

## Response example

```json
{
  "id": 41517088,
  "user_id": 813887163,
  "description": "Doc's grocery store",
  "business_hours": {
  "monday": [
  {
  "open": "8:00",
  "close": "15:00"
  }
  ],
  "tuesday": [
  {
  "open": "8:00",
  "close": "15:00"
  }
  ],
  "wendsday": [
  {
  "open": "8:00",
  "close": "15:00"
  }
  ],
  "thursday": [
  {
  "open": "8:00",
  "close": "15:00"
  }
  ],
  "friday": [
  {
  "open": "8:00",
  "close": "15:00"
  }
  ]
  },
  "location": {
  "address_line": "Viaduto Arapuã - Saude, São Paulo - SP, 04307-070, Brasil",
  "reference": "Next to a bakery",
  "latitude": -23.630159633405057,
  "longitude": -46.64532809999999
  },
  "external_id": "9320001PC21"
}
```