# List an attribute's distinct values

`GET /catalog/v1/{catalog_id}/types/{object_type}/attributes/{attribute_name}/values`

List an attribute's distinct scalar values.

Numbers and booleans are returned as typed JSON values. An unknown attribute
returns 404; a known non-scalar attribute has no scalar values and returns an
empty page. `query` is supported only for text attributes. At most 1,000
distinct values are considered, ordered by the number of objects carrying
each value (most common first), so `total` is capped at 1,000.

## Request example

```bash
curl --request GET \
  --url 'https://api.eu1.luigisbox.ai/catalog/v1/<catalog_id>/types/<object_type>/attributes/<attribute_name>/values?page=1&size=20' \
  --header 'Authorization: Bearer <access_token>'
```

## Path Parameters

| Name | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `catalog_id` | `string` | Yes | Catalog Id | — |
| `object_type` | `string` | Yes | Object Type | — |
| `attribute_name` | `string` | Yes | Attribute Name | — |

## Query Parameters

| Name | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `query` | `anyOf(string, null)` | No | Case-insensitive substring match on the value. | — |
| `page` | `integer` | No | Page | >= 1 |
| `size` | `integer` | No | Size | >= 1; <= 100 |

## Responses

| Status | Description | Content |
|---|---|---|
| `200` | Successful Response | application/json: object |
| `401` | Missing or invalid credentials | application/json: object |
| `403` | Authenticated but not permitted | application/json: object |
| `404` | Resource not found | application/json: object |
| `422` | Request validation failed | application/json: object |
| `502` | Upstream service failed | application/json: object |

### 200

Successful Response

#### application/json

Schema: `object`

##### Attributes

| Attribute | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `items` | `Array<object>` | Yes | Items | — |
| `items[].value` | `anyOf(string, integer, number, boolean)` | Yes | A distinct value of the attribute, typed to the attribute's value shape. | — |
| `page` | `integer` | Yes | Page | — |
| `size` | `integer` | Yes | Size | — |
| `total` | `integer` | Yes | Total | — |

##### Response example

```json
{
  "items": [
    {
      "value": "example"
    }
  ],
  "page": 1,
  "size": 1,
  "total": 1
}
```

### 401

Missing or invalid credentials

#### application/json

Schema: `object`

##### Attributes

| Attribute | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `exception_details` | `object` | No | Machine-readable error context; empty object when there is nothing to add. | — |
| `exception_details.validation_errors` | `anyOf(Array<object>, null)` | No | Every field-level problem found in the request, when validation is what failed. Absent when the rejection is not about a specific value. | — |
| `exception_details.validation_errors[].loc` | `Array<anyOf(string, integer)>` | Yes | Path to the offending value from the request root, e.g. `["body", "filters", 0, "operator"]`. | — |
| `exception_details.validation_errors[].msg` | `string` | Yes | What is wrong with the value at `loc`. | — |
| `exception_details.validation_errors[].type` | `string` | Yes | Stable machine code for the problem, e.g. `missing` or `string_too_short`. | — |
| `exception_details.*` | `any` | No | Additional property. | — |
| `reason` | `string` | Yes | Human-readable, actionable error message. | — |
| `request_id` | `anyOf(string, null)` | No | Request correlation ID (matches the X-Request-Id response header). | — |

##### Response example

```json
{
  "exception_details": {
    "validation_errors": [
      {
        "loc": [
          "example"
        ],
        "msg": "example",
        "type": "example"
      }
    ]
  },
  "reason": "example",
  "request_id": "example"
}
```

### 403

Authenticated but not permitted

#### application/json

Schema: `object`

##### Attributes

| Attribute | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `exception_details` | `object` | No | Machine-readable error context; empty object when there is nothing to add. | — |
| `exception_details.validation_errors` | `anyOf(Array<object>, null)` | No | Every field-level problem found in the request, when validation is what failed. Absent when the rejection is not about a specific value. | — |
| `exception_details.validation_errors[].loc` | `Array<anyOf(string, integer)>` | Yes | Path to the offending value from the request root, e.g. `["body", "filters", 0, "operator"]`. | — |
| `exception_details.validation_errors[].msg` | `string` | Yes | What is wrong with the value at `loc`. | — |
| `exception_details.validation_errors[].type` | `string` | Yes | Stable machine code for the problem, e.g. `missing` or `string_too_short`. | — |
| `exception_details.*` | `any` | No | Additional property. | — |
| `reason` | `string` | Yes | Human-readable, actionable error message. | — |
| `request_id` | `anyOf(string, null)` | No | Request correlation ID (matches the X-Request-Id response header). | — |

##### Response example

```json
{
  "exception_details": {
    "validation_errors": [
      {
        "loc": [
          "example"
        ],
        "msg": "example",
        "type": "example"
      }
    ]
  },
  "reason": "example",
  "request_id": "example"
}
```

### 404

Resource not found

#### application/json

Schema: `object`

##### Attributes

| Attribute | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `exception_details` | `object` | No | Machine-readable error context; empty object when there is nothing to add. | — |
| `exception_details.validation_errors` | `anyOf(Array<object>, null)` | No | Every field-level problem found in the request, when validation is what failed. Absent when the rejection is not about a specific value. | — |
| `exception_details.validation_errors[].loc` | `Array<anyOf(string, integer)>` | Yes | Path to the offending value from the request root, e.g. `["body", "filters", 0, "operator"]`. | — |
| `exception_details.validation_errors[].msg` | `string` | Yes | What is wrong with the value at `loc`. | — |
| `exception_details.validation_errors[].type` | `string` | Yes | Stable machine code for the problem, e.g. `missing` or `string_too_short`. | — |
| `exception_details.*` | `any` | No | Additional property. | — |
| `reason` | `string` | Yes | Human-readable, actionable error message. | — |
| `request_id` | `anyOf(string, null)` | No | Request correlation ID (matches the X-Request-Id response header). | — |

##### Response example

```json
{
  "exception_details": {
    "validation_errors": [
      {
        "loc": [
          "example"
        ],
        "msg": "example",
        "type": "example"
      }
    ]
  },
  "reason": "example",
  "request_id": "example"
}
```

### 422

Request validation failed

#### application/json

Schema: `object`

##### Attributes

| Attribute | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `exception_details` | `object` | No | Machine-readable error context; empty object when there is nothing to add. | — |
| `exception_details.validation_errors` | `anyOf(Array<object>, null)` | No | Every field-level problem found in the request, when validation is what failed. Absent when the rejection is not about a specific value. | — |
| `exception_details.validation_errors[].loc` | `Array<anyOf(string, integer)>` | Yes | Path to the offending value from the request root, e.g. `["body", "filters", 0, "operator"]`. | — |
| `exception_details.validation_errors[].msg` | `string` | Yes | What is wrong with the value at `loc`. | — |
| `exception_details.validation_errors[].type` | `string` | Yes | Stable machine code for the problem, e.g. `missing` or `string_too_short`. | — |
| `exception_details.*` | `any` | No | Additional property. | — |
| `reason` | `string` | Yes | Human-readable, actionable error message. | — |
| `request_id` | `anyOf(string, null)` | No | Request correlation ID (matches the X-Request-Id response header). | — |

##### Response example

```json
{
  "exception_details": {
    "validation_errors": [
      {
        "loc": [
          "example"
        ],
        "msg": "example",
        "type": "example"
      }
    ]
  },
  "reason": "example",
  "request_id": "example"
}
```

### 502

Upstream service failed

#### application/json

Schema: `object`

##### Attributes

| Attribute | Type | Required | Description | Constraints |
|---|---|---|---|---|
| `exception_details` | `object` | No | Machine-readable error context; empty object when there is nothing to add. | — |
| `exception_details.validation_errors` | `anyOf(Array<object>, null)` | No | Every field-level problem found in the request, when validation is what failed. Absent when the rejection is not about a specific value. | — |
| `exception_details.validation_errors[].loc` | `Array<anyOf(string, integer)>` | Yes | Path to the offending value from the request root, e.g. `["body", "filters", 0, "operator"]`. | — |
| `exception_details.validation_errors[].msg` | `string` | Yes | What is wrong with the value at `loc`. | — |
| `exception_details.validation_errors[].type` | `string` | Yes | Stable machine code for the problem, e.g. `missing` or `string_too_short`. | — |
| `exception_details.*` | `any` | No | Additional property. | — |
| `reason` | `string` | Yes | Human-readable, actionable error message. | — |
| `request_id` | `anyOf(string, null)` | No | Request correlation ID (matches the X-Request-Id response header). | — |

##### Response example

```json
{
  "exception_details": {
    "validation_errors": [
      {
        "loc": [
          "example"
        ],
        "msg": "example",
        "type": "example"
      }
    ]
  },
  "reason": "example",
  "request_id": "example"
}
```