Get Product Attribute details by use of REST API Magento 2. You can retrieve all the available information from the given product attribute.
Action: GET
Request URL: <HOST_URL>/rest/V1/products/attributes/<product_attribute>(Example: https://magento.test/rest/V1/products/attributes/meta_title)
Header: Authorization:Bearer <admin_user_token>
Response: Product Attribute Details
{
    "extension_attributes": {
        "is_pagebuilder_enabled": false
    },
    "is_wysiwyg_enabled": false,
    "is_html_allowed_on_front": false,
    "used_for_sort_by": false,
    "is_filterable": false,
    "is_filterable_in_search": false,
    "is_used_in_grid": false,
    "is_visible_in_grid": false,
    "is_filterable_in_grid": false,
    "position": 0,
    "apply_to": [],
    "is_searchable": "0",
    "is_visible_in_advanced_search": "0",
    "is_comparable": "0",
    "is_used_for_promo_rules": "0",
    "is_visible_on_front": "0",
    "used_in_product_listing": "0",
    "is_visible": true,
    "scope": "store",
    "attribute_id": 82,
    "attribute_code": "meta_title",
    "frontend_input": "text",
    "entity_type_id": "4",
    "is_required": false,
    "options": [],
    "is_user_defined": false,
    "default_frontend_label": "Meta Title",
    "frontend_labels": [],
    "note": "",
    "backend_type": "varchar",
    "is_unique": "0",
    "validation_rules": []
}
This is the basic operation you have to perform to fetch details of product attributes.