DNS
Mock 23 BADCOOKIE Response
Bad or missing server cookie. The DNS COOKIE option in the request is absent, malformed, or does not match the server's expected value.
View full reference →1 HTTP Response
HTTP/1.1 23 BADCOOKIE
Content-Type: application/json
Date: Tue, 25 Feb 2026 12:00:00 GMT
Content-Length: 21
{
"status": "success"
}
2 Test with curl
curl -i https://httpbin.org/status/23
3 Return 23 BADCOOKIE in Your Framework
django
from django.http import JsonResponse
def my_view(request):
return JsonResponse(
{"status": "success"},
status=23,
)
flask
from flask import Flask, jsonify
app = Flask(__name__)
@app.route("/endpoint")
def my_endpoint():
return jsonify({"status": "success"}), 23
fastapi
from fastapi import FastAPI
from fastapi.responses import JSONResponse
app = FastAPI()
@app.get("/endpoint")
def my_endpoint():
return JSONResponse(
content={"status": "success"},
status_code=23,
)
express.js
// Express.js
app.get('/endpoint', (req, res) => {
res.status(23).json({"status": "success"});
});
spring boot
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.util.Map;
@RestController
public class MyController {
@GetMapping("/endpoint")
public ResponseEntity<Map<String, Object>> myEndpoint() {
return ResponseEntity
.status(23)
.body(Map.of("error", "badcookie",
"message", "BADCOOKIE"));
}
}
go net/http
package main
import (
"encoding/json"
"net/http"
)
func myHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(23)
json.NewEncoder(w).Encode(map[string]string{
"error": "badcookie",
"message": "BADCOOKIE",
})
}
ruby on rails
class MyController < ApplicationController
def my_action
render json: {"status": "success"},
status: :badcookie
end
end
asp.net core
// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
Results.Json(
new { error = "badcookie", message = "BADCOOKIE" },
statusCode: 23
)
);