HTTP Status 403 - Forbidden

DELETE /api/users/42 HTTP/1.1
Host: api.example.com
Authorization: Bearer token_user_role

HTTP/1.1 403 Forbidden
Content-Type: application/json

{
  "error": "insufficient_permissions",
  "message": "Admin role required to delete users",
  "required_role": "admin",
  "current_role": "user"
}

PUT /api/documents/doc-123 HTTP/1.1
Host: api.example.com
Authorization: Bearer token_user_alice

HTTP/1.1 403 Forbidden
Content-Type: application/json

{
  "error": "access_denied",
  "message": "You can only edit your own documents",
  "document_owner": "bob",
  "current_user": "alice"
}

GET /api/admin HTTP/1.1
Host: api.example.com
Authorization: Bearer valid_token
X-Forwarded-For: 203.0.113.42

HTTP/1.1 403 Forbidden
Content-Type: application/json

{
  "error": "ip_not_allowed",
  "message": "Admin API only accessible from whitelisted IPs",
  "client_ip": "203.0.113.42",
  "allowed_ranges": ["192.0.2.0/24", "198.51.100.0/24"]
}