## Create a product property

`POST /v1/catalog-product-properties`

Creates a product property in the catalog. Fields are passed flat at the root of the JSON. The response returns the full object of the created property.

## Request fields (body)

| Field | Type | Req. | Description |
|------|-----|:-----:|---------|
| `iblockId` | number | yes | Catalog ID. List: `GET /v1/catalogs` |
| `name` | string | yes | Display name of the property |
| `propertyType` | string | yes | Base type. `N` number, `S` string, `L` list, `F` file, `E` element binding, `G` section binding |
| `code` | string | no | Symbolic code. Latin letters, digits, underscore. First character is not a digit |
| `active` | boolean | no | Whether the property is active. Defaults to `true` |
| `sort` | number | no | Sort index |
| `defaultValue` | string | no | Default value |
| `userType` | string | no | User type, for example `directory`, `DateTime`, `Money`, `HTML` |
| `userTypeSettings` | object | no | User type settings |
| `listType` | string | no | List appearance. `L` dropdown, `C` checkboxes |
| `multiple` | boolean | no | Multiple value |
| `multipleCnt` | number | no | Number of inputs for multiple values |
| `withDescription` | boolean | no | Value description field |
| `searchable` | boolean | no | Participates in search |
| `filtrable` | boolean | no | Participates in the filter |
| `isRequired` | boolean | no | Required to fill in |
| `linkIblockId` | number | no | Linked catalog ID for binding types |
| `fileType` | string | no | Allowed file extensions for type `F` |
| `xmlId` | string | no | External ID |
| `hint` | string | no | Field hint |

## Examples

### curl — personal key

```bash
curl -X POST "https://vibecode.bitrix24.com/v1/catalog-product-properties" \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "iblockId": 19,
    "name": "Material",
    "propertyType": "S"
  }'
```

### curl — OAuth application

```bash
curl -X POST "https://vibecode.bitrix24.com/v1/catalog-product-properties" \
  -H "X-Api-Key: YOUR_APP_KEY" \
  -H "Authorization: Bearer USER_SESSION_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "iblockId": 19,
    "name": "Material",
    "propertyType": "S"
  }'
```

### JavaScript — personal key

```javascript
const res = await fetch('https://vibecode.bitrix24.com/v1/catalog-product-properties', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    iblockId: 19,
    name: 'Material',
    propertyType: 'S',
  }),
})

const { success, data } = await res.json()
console.log('Property ID:', data.id)
```

### JavaScript — OAuth application

```javascript
const res = await fetch('https://vibecode.bitrix24.com/v1/catalog-product-properties', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_APP_KEY',
    'Authorization': 'Bearer USER_SESSION_TOKEN',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    iblockId: 19,
    name: 'Material',
    propertyType: 'S',
  }),
})

const { success, data } = await res.json()
```

## Response fields

| Field | Type | Description |
|------|-----|---------|
| `success` | boolean | Always `true` on success |
| `data` | object | Full object of the created property. The field set is the same as [`GET /v1/catalog-product-properties/:id`](./get.md) |

The `id` of the created property matches `NNN` in the `propertyNNN` key, under which this property's value is returned for a product in [Catalog products](/docs/entities/catalog-products):

```
propertyNNN  →  property659
```

`NNN` is the value of the `id` field. It is used to build the `id → name` mapping that labels `propertyNNN` values.

## Response example

The main fields are shown.

```json
{
  "success": true,
  "data": {
    "id": 659,
    "iblockId": 19,
    "name": "Material",
    "propertyType": "S",
    "code": "s12",
    "active": true,
    "sort": null,
    "defaultValue": null,
    "userType": "directory",
    "userTypeSettings": {
      "group": "N",
      "multiple": "N",
      "size": 1,
      "tableName": "b_hlbd_categories",
      "width": 0
    },
    "listType": "L",
    "multiple": false,
    "multipleCnt": null,
    "withDescription": null,
    "searchable": false,
    "filtrable": false,
    "isRequired": false,
    "linkIblockId": null,
    "fileType": null,
    "xmlId": null,
    "hint": null,
    "timestampX": "2026-03-19T18:23:02.000Z"
  }
}
```

## Error response example

422 — a required field was not passed:

```json
{
  "success": false,
  "error": {
    "code": "BITRIX_ERROR",
    "message": "Required fields: name"
  }
}
```

## Errors

| HTTP | Code | Description |
|------|-----|----------|
| 422 | `BITRIX_ERROR` | A required field was not passed — the message lists the missing ones (`Required fields: name`, `Required fields: propertyType`) |
| 422 | `BITRIX_ERROR` | The catalog with the specified `iblockId` was not found (`Iblock Not Found`) |
| 400 | `READONLY_FIELD` | A read-only field was passed in the body, for example `id` or `timestampX` |
| 403 | `SCOPE_DENIED` | The key lacks the `catalog` scope |
| 401 | `MISSING_API_KEY` | The `X-Api-Key` header was not passed |

Full list of common API errors — [Errors](/docs/errors).

## See also

- [List product properties](/docs/entities/catalog-product-properties/list)
- [Get a product property](/docs/entities/catalog-product-properties/get)
- [Update a product property](/docs/entities/catalog-product-properties/update)
- [Delete a product property](/docs/entities/catalog-product-properties/delete)
- [Catalog products](/docs/entities/catalog-products)
- [Batch](/docs/batch)
- [Limits and optimization](/docs/optimization)