HTTP Status 418 - I’m a Teapot

GET /api/coffee HTTP/1.1
Host: api.example.com

HTTP/1.1 418 I'm a teapot
Content-Type: application/json

{
  "error": "teapot",
  "message": "I'm a teapot, short and stout. I cannot brew coffee.",
  "hint": "Try /api/tea instead",
  "rfc": "https://tools.ietf.org/html/rfc2324"
}

POST /api/brew HTTP/1.1
Host: htcpcp.example.com
Content-Type: application/coffee-pot-command

BREW coffee://pot-0

HTTP/1.1 418 I'm a teapot
Content-Type: text/plain

Error: This device is a teapot. Coffee brewing operations are not supported.
Please use a coffee pot for coffee brewing.

GET /api/make-coffee HTTP/1.1
Host: api.example.com
Accept: application/json

HTTP/1.1 418 I'm a teapot
Content-Type: application/json
Link: </api/tea>; rel="alternate"

{
  "status": 418,
  "error": "im_a_teapot",
  "message": "The server refuses to brew coffee because it is, permanently, a teapot.",
  "alternatives": {
    "tea": "/api/tea",
    "water": "/api/water"
  }
}