Kompletne przepływy, a nie pojedyncze wywołania.

const base = "https://achadu.com/api/v1";
const headers = {
  Authorization: `Bearer ${process.env.ACHADU_API_KEY}`,
  "Content-Type": "application/json"
};

const offer = await fetch(`${base}/offers`, {
  method: "POST", headers,
  body: JSON.stringify({
    url: "https://www.amazon.com.br/dp/...",
    title: "Air fryer 5L", price: 329.90, currency: "BRL"
  })
}).then(r => r.json());

const publication = await fetch(`${base}/publications`, {
  method: "POST", headers,
  body: JSON.stringify({ offer_id: offer.data.id, group_ids: ["grp_..."] })
}).then(r => r.json());

app.post("/webhooks/achadu", raw({ type: "application/json" }), (req, res) => {
  verifyAchaduSignature(req.headers, req.body);
  const event = JSON.parse(req.body.toString("utf8"));

  if (alreadyProcessed(event.id)) return res.sendStatus(200);
  enqueueByType(event.type, event.data);
  markProcessed(event.id);
  return res.sendStatus(202);
});