Oblique Markets · Paid B402 Preflight

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://api.oblique.markets/api/v1/paid/b402-preflight", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "amount": "example",
    "asset": "native/BNB or a BEP-20 contract address",
    "chain": "bnb",
    "deadline": "example",
    "fee_cap": "Maximum network fee in BNB",
    "intent_id": "example",
    "payer": "example",
    "recipient": "example"
  }),
});
const data = await res.json();

curl -X POST \
  "https://api.oblique.markets/api/v1/paid/b402-preflight" \
  -H "Content-Type: application/json" \
  -d '{"amount":"example","asset":"native/BNB or a BEP-20 contract address","chain":"bnb","deadline":"example","fee_cap":"Maximum network fee in BNB","intent_id":"example","payer":"example","recipient":"example"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "amount": "0.01",
  "amount_units": "10000000000000000",
  "asset": "BNB",
  "asset_balance": "0.125",
  "chain": "eip155:56",
  "decision": "ready",
  "evidence_hash": "sha256:4e8f1a2c6d8b0f2e4a6c8e0f2a4c6e8f0a2c4e6f8a0b2c4d6e8f0a2c4e6f8a0b2",
  "evidence_source": "public_bsc_rpc",
  "fee_cap_bnb": "0.0005",
  "fee_cap_sufficient": true,
  "fee_headroom_bnb": "0.1245",
  "intent_hash": "sha256:9c2d7b3f6e1a4c8b0d2e5f7a9b1c3d5e7f9a1b3c5d7e9f1a3b5c7d9e1f3a5b7c9",
  "intent_id": "invoice-2026-08-21-001",
  "payer": "0x1111111111111111111111111111111111111111",
  "recent_activity": {
    "incoming_transfer_count": 5,
    "latest_block": 61500000,
    "lookback_blocks": 2000,
    "nonce": 42,
    "outgoing_transfer_count": 3
  },
  "recipient": "0x2222222222222222222222222222222222222222",
  "recipient_valid": true,
  "signature": "hmac-sha256:7a4e1c9b3d5f7a9c1e3b5d7f9a1c3e5b7d9f1a3c5e7b9d1f3a5c7e9b1d3f5a7",
  "signing_key_id": "b402-preflight-v1",
  "timestamp": "2026-08-21T20:00:00.000Z"
}