SIP
Simular Resposta 503 Service Unavailable
The server is temporarily unable to process the request due to overloading or maintenance. The client should retry after the time indicated in the Retry-After header.
Ver referência completa →1 Resposta HTTP
HTTP/1.1 503 Service Unavailable
Content-Type: application/json
Date: Tue, 25 Feb 2026 12:00:00 GMT
Retry-After: 300
Content-Length: 52
{
"error": "service_unavailable",
"retry_after": 300
}
2 Testar com curl
curl -i https://httpbin.org/status/503
3 Retornar 503 Service Unavailable no Seu Framework
django
from django.http import JsonResponse
def my_view(request):
return JsonResponse(
{"error": "service_unavailable", "retry_after": 300},
status=503,
)
flask
from flask import Flask, jsonify
app = Flask(__name__)
@app.route("/endpoint")
def my_endpoint():
return jsonify({"error": "service_unavailable", "retry_after": 300}), 503
fastapi
from fastapi import FastAPI
from fastapi.responses import JSONResponse
app = FastAPI()
@app.get("/endpoint")
def my_endpoint():
return JSONResponse(
content={"error": "service_unavailable", "retry_after": 300},
status_code=503,
)
express.js
// Express.js
app.get('/endpoint', (req, res) => {
res.status(503).json({"error": "service_unavailable", "retry_after": 300});
});
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(503)
.body(Map.of("error", "service_unavailable",
"message", "Service Unavailable"));
}
}
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(503)
json.NewEncoder(w).Encode(map[string]string{
"error": "service_unavailable",
"message": "Service Unavailable",
})
}
ruby on rails
class MyController < ApplicationController
def my_action
render json: {"error": "service_unavailable", "retry_after": 300},
status: :service_unavailable
end
end
asp.net core
// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
Results.Json(
new { error = "service_unavailable", message = "Service Unavailable" },
statusCode: 503
)
);