Every storefront,
open for AI agents.

讓每一家店鋪，
都能被 AI agent 讀懂並付款。

Stripe put card checkout on the web. MoonPay put fiat on-ramps on it. AgentPay puts x402 checkout on any storefront — one pasted script, and an AI agent can read your catalog, quote a price, wait for a human "yes", and settle in USDT on BNB Chain through Binance OnchainPay (B402). Built for the Binance Agent OS Mini Hackathon, Track A.

Stripe 讓網頁能刷卡，MoonPay 讓網頁能入金。 AgentPay 讓任何店鋪貼一行腳本就擁有 x402 結賬 —— AI agent 讀取商品目錄 → 報價 → 等人類確認「是」→ 透過 Binance OnchainPay（B402）在 BNB Chain 上用 USDT 結算 → 取貨連結 + 收據。為 Binance Agent OS Mini Hackathon 賽道 A 而構建。

Try the live demo試試在線演示 Read the code閱讀源碼

The problem問題Agents can browse. They can't buy.Agent 會逛店，但買不了單。

AI agents already research products, compare prices, and draft orders — then stall at a checkout form built for human eyes: passwords, card fields, CAPTCHAs. Meanwhile the HTTP status code for exactly this moment, 402 Payment Required, sat unused since 1997. The x402 protocol revived it; Binance brought it to BNB Chain. What was missing is the merchant side: a way for an ordinary small shop to opt in without rebuilding anything. That's AgentPay.

AI agent 早就會調研商品、比價、擬訂單 —— 然後卡死在為人眼設計的結賬表單前：密碼、卡號、驗證碼。 而 HTTP 裡專為這一刻準備的狀態碼 402 Payment Required，從 1997 年起一直閒置。 x402 協議喚醒了它，Binance 把它帶上了 BNB Chain。缺的是商家這一側： 讓一家普通小店不用重寫任何東西就能接入。這就是 AgentPay。

Innovation創新點What's actually new here到底新在哪裡

Architecture架構One purchase, seven steps一次購買，七個步驟

1. Agent discovers the shop.MCP tool list_products reads /.well-known/agent-store.json — digital SKUs only, prices in cents, live from the real catalog. Agent 發現店鋪。MCP 工具 list_products 讀取 /.well-known/agent-store.json —— 僅數字商品、價格以分計、實時來自真實目錄。
2. Agent quotes.quote_product → price, asset (USDT), network (BNB Chain), and a one-shot confirmToken. Agent 報價。quote_product → 價格、資產（USDT）、網絡（BNB Chain）與一次性 confirmToken。
3. Human says yes.The agent presents the quote; only a human confirmation unlocks the token. No token → HTTP 409. 人類說「是」。Agent 呈上報價；只有人類確認才解鎖令牌。沒有令牌 → HTTP 409。
4. Server challenges: HTTP 402.x402 v2 payload: accepts[] (schemes exact × eip3009 | permit2-exact), amount, payTo, fresh nonce. 服務器挑戰：HTTP 402。x402 v2 載荷：accepts[]（exact × eip3009 | permit2-exact）、金額、payTo、新 nonce。
5. Agent pays.Retries with base64 X-PAYMENT header — a signed USDT authorization for BNB Chain. Agent 付款。帶 base64 X-PAYMENT 頭重試 —— 一份面向 BNB Chain 的 USDT 簽名授權。
6. Facilitator settles.Gateway calls Binance OnchainPay B402 verify → settle (mock in demo). Binance handles chain interaction and gas. Facilitator 結算。閘道調用 Binance OnchainPay B402 verify → settle（演示為 mock）。鏈上交互與 gas 由 Binance 處理。
7. Delivery + receipt.200 OK with tx hash, X-PAYMENT-RESPONSE, pickup URL, and an emailed receipt. Order queryable via get_order. 交付 + 收據。200 OK 帶 tx hash、X-PAYMENT-RESPONSE、取貨 URL 與郵件收據。訂單可經 get_order 查詢。

# the whole protocol, visible in curl# 整套協議，curl 裡看得見
POST /agent/quote/apple-one          → 200 { amount: "$8.88", confirmToken }
POST /agent/buy/apple-one            → 409 confirmation required→ 409 需要確認
POST /agent/buy/apple-one  X-Confirm-Token: …  → 402 { accepts: [eip3009, permit2-exact] }
POST /agent/buy/apple-one  X-PAYMENT: base64(…) → 200 { txHash, pickupUrl }  + X-PAYMENT-RESPONSE

The stack技術棧How AgentPay uses Binance · BSC · x402 · AI agentsAgentPay 如何運用 Binance · BSC · x402 · AI agent

Compliance合規Built inside the rules在規則之內構建

See it眼見為實Three links, sixty seconds三個連結，六十秒

Run a mock purchase跑一次 mock 購買 See the one-line install看一行接入 Audit the code審查源碼