OKX x402決済：agent登録と残高チャージ

curl -i -X POST https://bazaarlink.ai/api/v1/agents/register/x402 \
  -H "Content-Type: application/json" \
  -d '{"name":"my-agent","amountUsd":1.1}'

HTTP/1.1 402 Payment Required
Content-Type: application/json

{
  "x402Version": 2,
  "resource": {
    "url": "https://bazaarlink.ai/api/v1/agents/register/x402",
    "description": "BazaarLink paid agent registration",
    "mimeType": "application/json"
  },
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:196",
      "payTo": "0xPAY_TO_ADDRESS",
      "asset": "0xASSET_CONTRACT",
      "amount": "1100000",
      "maxTimeoutSeconds": 300,
      "extra": { "name": "USD₮0", "version": "1" }
    }
  ]
}

curl -i -X POST https://bazaarlink.ai/api/v1/agents/register/x402 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <base64 payment payload>" \
  -d '{"name":"my-agent","amountUsd":1.1}'

import { x402Client } from "@okxweb3/x402-core/client";
import type { Network } from "@okxweb3/x402-core/types";
import { toClientEvmSigner } from "@okxweb3/x402-evm";
import { ExactEvmScheme } from "@okxweb3/x402-evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const URL = "https://bazaarlink.ai/api/v1/agents/register/x402";
const HEADERS = { "content-type": "application/json" };
const BODY = JSON.stringify({ name: "my-agent", amountUsd: 1.1 });

// 1. Ask without paying. The 402 body lists what the server accepts.
const challenge = await fetch(URL, { method: "POST", headers: HEADERS, body: BODY });
if (challenge.status !== 402) throw new Error("unexpected status " + challenge.status);
const paymentRequired = await challenge.json();

// 2. Sign the payment authorization with your own wallet key.
const privateKey = readSecret("payer-private-key") as `0x${string}`; // from your own secret store, never from source code
const signer = toClientEvmSigner(privateKeyToAccount(privateKey));
const client = new x402Client().register(
  paymentRequired.accepts[0].network as Network,
  new ExactEvmScheme(signer),
);
const payload = await client.createPaymentPayload(paymentRequired);
const xPayment = Buffer.from(JSON.stringify(payload), "utf8").toString("base64");

// 3. Send the same request again with the signed payment.
const res = await fetch(URL, { method: "POST", headers: { ...HEADERS, "x-payment": xPayment }, body: BODY });
const account = await res.json(); // 201: api_key, credits, claim_token, payment ...
console.log(res.status, account.credits_usd);

HTTP/1.1 201 Created
Content-Type: application/json

{
  "api_key": "sk-bl-...",
  "credits": 1,
  "credits_usd": "$1.0000",
  "claim_token": "...",
  "claim_expires": "2026-10-08T00:00:00.000Z",
  "upgrade_url": "https://bazaarlink.ai/claim?token=...",
  "referral_code": "...",
  "free_model": "auto:free",
  "message": "...",
  "referral_message": "...",
  "base_url": "https://bazaarlink.ai/api/v1",
  "docs": "https://bazaarlink.ai/llms.txt",
  "payment": {
    "txHash": "0xTX_HASH",
    "network": "eip155:196",
    "amountUsd": 1.1,
    "paidUsd": 1.1,
    "creditedUsd": 1,
    "serviceFeeUsd": 0.1
  }
}

curl -i -X POST https://bazaarlink.ai/api/x402/topup \
  -H "Authorization: Bearer $BAZAARLINK_API_KEY" \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <base64 payment payload>" \
  -d '{"amountUsd":1.1}'

HTTP/1.1 200 OK
Content-Type: application/json

{
  "status": "credited",
  "balance": 12.5,
  "txHash": "0xTX_HASH",
  "paidUsd": 1.1,
  "creditedUsd": 1,
  "serviceFeeUsd": 0.1
}

// Same three steps against /api/x402/topup; only the URL, body and auth header change.
const URL = "https://bazaarlink.ai/api/x402/topup";
const HEADERS = {
  "content-type": "application/json",
  authorization: "Bearer " + process.env.BAZAARLINK_API_KEY,
};
const BODY = JSON.stringify({ amountUsd: 1.1 });
// ...reuse the challenge / sign / resend code from the registration example.
// 200 -> { "status": "credited", "balance": 12.5, "txHash": "0x...", "paidUsd": 1.1, "creditedUsd": 1, "serviceFeeUsd": 0.1 }

curl https://bazaarlink.ai/api/x402/topup

{ "minUsd": 1, "maxUsd": 50, "network": "eip155:196" }

https://bazaarlink.ai/claim?token=<claim_token>