HTTP 451 — Unavailable For Legal Reasons
A server operator has received a legal demand to deny access to a resource or to a set of resources
When to use it
Use status 451 when this is the correct HTTP response semantic: A server operator has received a legal demand to deny access to a resource or to a set of resources
Request and response example
GET /protected-resource HTTP/1.1
Host: api.example.com
HTTP/1.1 451 Unavailable For Legal Reasons
Content-Type: application/json
{"error":"Request cannot be completed"}