# Retrieve a metafield definition type

> Retrieve a single metafield definition type.
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`GET /api/metafield_definition_types/{id}`

Retrieves a MetafieldDefinitionType resource.

Returns a single metafield definition type by id, including its `allowedValidations`.

## Path parameters

| Name | Type     | Required | Description                        |
| ---- | -------- | -------- | ---------------------------------- |
| `id` | `string` | Yes      | MetafieldDefinitionType identifier |

## Query parameters

| Name           | Type       | Required | Description                                                                                                                                                                                                                                                                          |
| -------------- | ---------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `properties[]` | `string[]` | -        | Allows you to reduce the response to contain only the properties you need. If your desired property is nested, you can address it using nested arrays. Example: properties[]={propertyName}&properties[]={anotherPropertyName}&properties[{nestedPropertyParent}][]={nestedProperty} |

## Response

**200** - MetafieldDefinitionType resource

| Property             | Type                        | Required | Description                                                                                                                                                                |
| -------------------- | --------------------------- | -------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `@context`           | `string \| object`          | -        |                                                                                                                                                                            |
| `@id`                | `string`                    | Yes      |                                                                                                                                                                            |
| `@type`              | `string`                    | Yes      |                                                                                                                                                                            |
| `allowedValidations` | `string[]`                  | -        | The validation types that can be applied to a metafield definition of this type. Submitting any other validation is rejected. Types that allow none return an empty array. |
| `description`        | `string`                    | -        | A human-readable description of the metafield definition type.                                                                                                             |
| `example`            | `string \| number \| array` | -        | An example value for a metafield of this type: a string, an integer or a decimal number for single-value types, an array of strings for list types.                        |
| `id`                 | `string`                    | -        | The metafield definition type identifier (e.g. `number_decimal`).                                                                                                          |

## Errors

**404** - Not found

| Property      | Type               | Required | Description                                                                                                                          |
| ------------- | ------------------ | -------- | ------------------------------------------------------------------------------------------------------------------------------------ |
| `@context`    | `string \| object` | -        |                                                                                                                                      |
| `@id`         | `string`           | Yes      |                                                                                                                                      |
| `@type`       | `string`           | Yes      |                                                                                                                                      |
| `code`        | `string`           | -        | Stable identifier of the error in the error code catalogue (see /api/error-codes). Present on catalogued errors only.                |
| `description` | `string \| null`   | -        |                                                                                                                                      |
| `detail`      | `string \| null`   | -        | A human-readable explanation specific to this occurrence of the problem.                                                             |
| `instance`    | `string \| null`   | -        | A URI reference that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced. |
| `message`     | `string`           | -        | End-user message localized in the request locale, with this occurrence's values substituted. Present on catalogued errors only.      |
| `slug`        | `string`           | -        | Stable, readable key of the error in the error code catalogue. Present on catalogued errors only.                                    |
| `status`      | `integer \| null`  | -        |                                                                                                                                      |
| `title`       | `string \| null`   | -        | A short, human-readable summary of the problem. For a catalogued error it repeats the `slug`.                                        |
| `type`        | `string`           | -        | A URI reference that identifies the problem type. For a catalogued error it is the error code resource, `/api/error-codes/{code}`.   |

## Examples

### Example request

```bash
curl -X GET 'https://<tenant>.product-management.flowkiwi.net/api/metafield_definition_types/<product_id>' \
  -H 'Authorization: Bearer {access_token}' \
  -H 'Flowkiwi-Api-Version: unstable' \
  -H 'Accept: application/ld+json'
```

### Example response

```json
{
  "@context": "/api/contexts/MetafieldDefinitionType",
  "@id": "/api/metafield_definition_types/number_decimal",
  "@type": "https://schema.org/Enumeration",
  "allowedValidations": [
    "/api/metafield_definition_validation_types/min_value",
    "/api/metafield_definition_validation_types/max_value",
    "/api/metafield_definition_validation_types/max_precision"
  ],
  "description": "A number with decimal.",
  "example": 10.4,
  "id": "number_decimal"
}
```