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PIX
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BTC Nativa
bc1qpu935hr3mx7zttznlemxv4xmqflg96fex6n0rn
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Status: —
Ordem: —
Rede BSC / USDT (BEP20). Envie também 0.003-0.01 BNB para fee do sweep.
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Public documentation for agents, search engines and builders. The protocol endpoint remains https://chainfx.store/mcp; this page explains how agents discover capabilities, run sponsored trials and continue to x402 paid execution.
Use ChainFX for PIX/card checkout, buy and sell orders, wallet settlement, webhooks, API keys and production pricing.
Developers can request quotes, create buy and sell orders, receive PIX/card payment status, deliver crypto and automate webhooks.
GET/rates
POST/quote
POST/buy
POST/sell
GET/order/{id}
POST/webhooks/test
To generate a real PIX QR Code, create a buy order with BRL amount, USDT asset, destination BSC wallet and optional customer audit fields. Each request creates a unique buy order and returns the PIX payload, QR Code, status URL and access token.
POST /buy
Authorization: Bearer sk_live_xxx
Content-Type: application/json
{
"fiat": "BRL",
"asset": "USDT",
"amount": 500,
"wallet": "0x174208255ECc40481f7fD7c34EE6a9A5B66B4339",
"paymentMethod": "pix",
"customer": {
"name": "Maria Silva",
"email": "maria@example.com",
"cpf": "12345678909",
"phone": "11999999999",
"birthDate": "1990-05-20",
"address": {
"line1": "Av Paulista",
"number": "1000",
"line2": "Apto 101",
"district": "Bela Vista",
"city": "Sao Paulo",
"state": "SP",
"postalCode": "01310100",
"country": "BR"
}
}
}
Response 201
{
"id": "buy_order_id",
"buyId": "buy_order_id",
"accessToken": "customer_access_token",
"status": "aguardando_pix",
"fiatCurrency": "BRL",
"paymentMethod": "pix",
"totalFiat": 510.30,
"cryptoAmount": 96.52,
"asset": "USDT",
"network": "BSC",
"destAddress": "0x174208255ECc40481f7fD7c34EE6a9A5B66B4339",
"qrCodeUrl": "https://...",
"payment": {
"provider": "pagseguro",
"pixKey": "...",
"qrCodeUrl": "https://..."
},
"statusUrl": "/api/buy/buy_order_id?accessToken=customer_access_token"
}Consolidated with the backend path: /buy accepts customer name, email, CPF, phone, birth date and address, forwards those fields to the PIX provider when creating the charge, stores audit hashes locally, and returns the PIX QR payload. Available buy assets and networks come from /api/buy/pairs.
For sell flows, the customer sends USDT on BSC/Polygon, BTC on native Bitcoin, or ETH on Ethereum/BSC to the deposit wallet and receives BRL via PIX after confirmation.
POST /sell
Authorization: Bearer sk_live_xxx
{
"asset": "USDT",
"network": "POLYGON",
"amount": 500,
"depositAddress": "0x174208255ECc40481f7fD7c34EE6a9A5B66B4339",
"pixCpf": "12345678909",
"pixPhone": "11999999999"
}Use webhooks to automate fulfillment when a payment is completed or crypto is sent.
{
"event": "payment.completed",
"orderId": "ord_123",
"status": "paid",
"asset": "USDT",
"amount": "96.52",
"timestamp": "2026-07-04T00:00:00Z"
}Production access starts with no activation fee. ChainFX earns from successful transactions through a fixed fee, percentage fee and FX spread.
Build and test your integration with fake PIX, fake QR Codes and test API keys.
Designed for developers launching real PIX to USDT flows without upfront cost.
Lower fees for teams with steady payment volume and operational needs.
Fees are deducted inside the payment flow before crypto delivery. The developer does not need to pay invoices after each transaction.
{
"fiatAmount": 500,
"feeRate": "4.5%-7.5%",
"networkFee": 1.99,
"minFee": 4.99,
"feeAmount": 29.49,
"totalFiat": 529.49,
"rate": 5.53,
"cryptoAmount": 90.42
}