GET List escalation policies

{
  "code": "demo",
  "detail": "Demo error detail; inspect the documented code.",
  "instance": "demo",
  "message": "Demo error detail; inspect the documented code.",
  "message_key": "errors.requestFailed",
  "message_params": {},
  "request_id": "00000000000000000000000000000000",
  "status": 422,
  "title": "Demo error",
  "type": "about:blank"
}

curl --silent --show-error --output /dev/null --write-out "%{http_code}\n" \
  --request GET \
  --header @"$HOME/.config/metribeacon/headers.txt" \
  "https://metribeacon.com/api/v1/notifications/escalation-policies"

import json
from pathlib import Path
from urllib.request import Request, HTTPRedirectHandler, build_opener
from urllib.error import HTTPError

headers = json.loads((Path.home() / ".config/metribeacon/headers.json").read_text())
request = Request('https://metribeacon.com/api/v1/notifications/escalation-policies', data=None, headers=headers, method='GET')
class NoRedirect(HTTPRedirectHandler):
    def redirect_request(self, request, fp, code, message, headers, target):
        return None

opener = build_opener(NoRedirect())
try:
    with opener.open(request, timeout=10) as response:
        print(response.status)
except HTTPError as error:
    print(error.code)
    error.close()

import { readFile } from "node:fs/promises";
import { homedir } from "node:os";
import { join } from "node:path";

const headers = JSON.parse(await readFile(join(homedir(), ".config/metribeacon/headers.json"), "utf8"));
const response = await fetch("https://metribeacon.com/api/v1/notifications/escalation-policies", {
  method: "GET", headers, redirect: "manual",
  signal: AbortSignal.timeout(10000),
});
console.log(response.status);
await response.body?.cancel();

package main

import (
 "fmt"
 "net/http"
 "time"
 "encoding/json"
 "os"
 "path/filepath"
)

func main() {
 home, err := os.UserHomeDir(); if err != nil { panic("credentials unavailable") }
 raw, err := os.ReadFile(filepath.Join(home, ".config/metribeacon/headers.json")); if err != nil { panic("credentials unavailable") }
 var headers map[string]string
 if json.Unmarshal(raw, &headers) != nil { panic("invalid local headers") }
 request, err := http.NewRequest("GET", "https://metribeacon.com/api/v1/notifications/escalation-policies", nil); if err != nil { panic("request invalid") }
 for name, value := range headers { request.Header.Set(name, value) }
 client := &http.Client{Timeout: 10*time.Second, CheckRedirect: func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse }}
 response, err := client.Do(request); if err != nil { panic("request failed") }
 defer response.Body.Close()
 fmt.Println(response.StatusCode)
}