HTTP Status 421 - Misdirected Request

GET /api/users HTTP/2
Host: api.example.com
:authority: api.example.com

HTTP/2 421 Misdirected Request
Content-Type: application/json

{
  "error": "misdirected_request",
  "message": "This connection is not authorized for api.example.com",
  "details": "TLS certificate only valid for cdn.example.com",
  "action": "Retry request on new connection"
}

GET /data HTTP/2
Host: secure.example.com
:authority: secure.example.com

HTTP/2 421 Misdirected Request
Content-Type: text/plain

Error: Request misdirected. Server certificate does not cover secure.example.com.
Certificate valid for: www.example.com, api.example.com
Please establish new connection to secure.example.com.

POST /api/orders HTTP/2
Host: shop.example.com
:authority: shop.example.com
Content-Type: application/json

{"product_id": 42, "quantity": 2}

HTTP/2 421 Misdirected Request
Content-Type: application/json

{
  "status": 421,
  "error": "connection_not_authorized",
  "message": "Current connection cannot be used for shop.example.com",
  "retry": "Client should retry on dedicated connection"
}