HTTP API Request Builder

const response = await fetch("https://api.example.com/v1/items?limit=20&include=owner", {
  method: "POST",
  headers: {
  "Accept": "application/json",
  "X-API-Key": "<redacted>",
  "Content-Type": "application/json"
},
  body: "{\"name\":\"demo\",\"enabled\":true}",
  signal: AbortSignal.timeout(30000)
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
const contentType = response.headers.get('content-type') ?? '';
const isJson = /\bapplication\/(?:[^;]+\+)?json\b/i.test(contentType);
const data = response.status === 204
  ? null
  : isJson
    ? await response.json()
    : await response.text();