Playground.

const response = await fetch(
  "https://api.dante.example/v1/systemone",
  {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.DANTE_API_KEY}`,
      "Content-Type": "application/json",
      "Idempotency-Key": crypto.randomUUID(),
    },
    body: JSON.stringify({
      "model": "dante-latest",
      "state": "Return policy: Unused items may be returned within 30 days with a receipt. Opened electronics can only be exchanged if defective. Customer: I bought this unopened keyboard 12 days ago, have the receipt, and would like a refund.",
      "questions": {
        "eligible": {
          "type": "noul",
          "instructions": "Is this customer eligible for a refund under the stated policy?"
        },
        "next_step": {
          "type": "choice",
          "instructions": "Choose the appropriate action based on the policy and customer facts.",
          "criteria": {
            "refund": "Approve the return and refund",
            "exchange": "Offer an exchange only",
            "deny": "Deny the return",
            "clarify": "Request missing information"
          }
        }
      }
    }),
  },
);

if (!response.ok) {
  throw new Error(`Dante request failed: ${response.status}`);
}

const result = await response.json();

const decision = result.answers["next_step"];
const probability = decision.probabilities[decision.choice];
const nextStep = probability >= 0.95
  ? decision.choice
  : "needs_review";