# (NEW!) Create Metadata Attribute

Create a new metadata attribute. Supports four attribute types: textbox, textarea, date, and dropdown. Each type has a distinct request schema and returns a type-specific response.

Business Rules:
- An attribute that is isRequired: true or isTypeahead: true cannot have technicalMetadataMapping values.
- A required attribute cannot also be sensitive (isRequired: true and isSensitive: true cannot both be set).
- isFacetable: true requires isSearchable: true.
- Max character limit for textbox is 250 characters.
- Max character limit for textarea is 10,000 characters.
- Textarea attributes cannot be facetable or support typeahead.

The user submitting the request must have the Metadata Management admin privilege.

Endpoint: POST /metadata/attribute
Version: 1.5
Security: ApiKeyAuth, BasicAuth

## Header parameters:

  - `X-API-Key` (string, required)
    Customer-specific API key required to invoke API.

  - `Authorization` (string, required)
    Provided by Authentication Token creation operation.

  - `Content-Type` (string, required)
    Enum: "application/json"

## Response 400 fields (application/json):

  - `message` (string)

  - `detail` (string)

## Response 401 fields (application/json):

  - `message` (string)

  - `detail` (string)

## Response 403 fields (application/json):

  - `message` (string)

  - `detail` (string)