Got it, you need the essential information to use the IUCN Red List API V4, without the code. Here's a concise guide:

**1. Base URL:**

* The base URL for all API requests is: `https://apiv4.iucnredlist.org`

**2. Authentication:**

* The API uses Bearer token authentication.
* You'll need to include an `Authorization` header in your HTTP requests.
* The header value should be: `Bearer YOUR_API_TOKEN` (replace `YOUR_API_TOKEN` with your actual token).

**3. Common Endpoints and Parameters:**

Here are a few common endpoints with examples of parameters you can pass:

* **Get a list of biogeographical realms:**
    * Endpoint: `GET /api/v4/biogeographical_realms/`
    * No parameters needed.
* **Get assessments for a biogeographical realm:**
    * Endpoint: `GET /api/v4/biogeographical_realms/{code}` (replace `{code}` with the realm code, e.g., `NT`)
    * Parameters (query parameters):
        * `page`: Page number (integer).
        * `year_published`: Filter by year published (integer).
        * `latest`: Filter by latest (boolean).
        * `possibly_extinct`: Filter by possibly extinct (boolean).
        * `possibly_extinct_in_the_wild`: Filter by possibly extinct in the wild (boolean).
        * `scope_code`: Filter by scope code (integer).
* **Get taxa by scientific name:**
    * Endpoint: `GET /api/v4/taxa/scientific_name`
    * Parameters (query parameters):
        * `genus_name`: The genus name (string, required).
        * `species_name`: The species name (string, required).
        * `infra_name`: The infra-name (string, optional).
        * `subpopulation_name`: The subpopulation name (string, optional).
* **Get assessments by kingdom name:**
    * Endpoint: `GET /api/v4/taxa/kingdom/{kingdom_name}` (replace `{kingdom_name}` with the kingdom name, e.g., `Animalia`)
    * Parameters (query parameters):
        * `page`: Page number (integer).
        * `year_published`: Filter by year published (integer).
        * `latest`: Filter by latest (boolean).
        * `scope_code`: Filter by scope code (integer).

**4. Request Example (using cURL):**

```bash
curl -H "Authorization: Bearer YOUR_API_TOKEN" "https://apiv4.iucnredlist.org/api/v4/biogeographical_realms/NT?page=1"
```

**5. Response Format:**

* The API returns JSON responses.

**Important Notes:**

* Replace `YOUR_API_TOKEN` with your actual token.
* Refer to the official API documentation for a complete list of endpoints and parameters.
* The API documentation will also provide example responses, which will help you understand the returned data.