list: API endpoint for returning a list of publishers.
retrieve: API endpoint for returning a particular publisher.

GET /v2/publishers/green-ronin/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "url": "https://api-beta.open5e.com/v2/publishers/green-ronin/?format=api",
    "key": "green-ronin",
    "name": "Green Ronin Publishing"
}