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This page is the shortest backend path from credentials to a working sandbox Pix payment.

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Prerequisites

  • A sandbox token
  • Access to https://api-sandbox.pagou.ai
  • A stable internal order ID to reuse as external_ref
  • An HTTPS webhook endpoint or a temporary local plan for reconciliation

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Step 1: verify authentication

curl --request GET \
  --url https://api-sandbox.pagou.ai/v2/transactions \
  --header "Authorization: Bearer YOUR_SANDBOX_TOKEN"
If this returns 200, your auth and network path are ready.

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Step 2: create a Pix transaction

curl --request POST \
  --url https://api-sandbox.pagou.ai/v2/transactions \
  --header "Authorization: Bearer YOUR_SANDBOX_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
    "external_ref": "order_1001",
    "amount": 1500,
    "currency": "BRL",
    "method": "pix",
    "notify_url": "https://merchant.example/webhooks/pagou",
    "buyer": {
      "name": "Ada Lovelace",
      "email": "ada@example.com",
      "document": {
        "type": "CPF",
        "number": "12345678901"
      }
    },
    "products": [
      {
        "name": "Starter order",
        "price": 1500,
        "quantity": 1
      }
    ]
  }'

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Example response

{
  "success": true,
  "requestId": "req_1001",
  "data": {
    "id": "tr_1001",
    "status": "pending",
    "method": "pix",
    "amount": 1500,
    "base_price": 1500,
    "currency": "BRL",
    "pix": {
      "qr_code": "000201010212...",
      "expiration_date": "2026-03-16T14:15:00.000Z",
      "receipt_url": null
    },
    "created_at": "2026-03-16T14:00:00.000Z",
    "updated_at": "2026-03-16T14:00:00.000Z",
    "paid_at": null
  }
}

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Step 3: persist identifiers

Store at least:
  • your external_ref
  • the Pagou transaction id
  • the current status
  • the requestId

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Step 4: use webhooks for final state

Return 200 OK quickly and process asynchronously. 
app.post("/webhooks/pagou", async (req, reply) => {
  const payload = req.body as { id?: string };

  if (!payload.id) {
    return reply.code(400).send({ error: "missing_event_id" });
  }

  reply.code(200).send({ received: true });
  await queue.enqueue(payload);
});

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Step 5: reconcile when you are unsure

curl --request GET \
  --url https://api-sandbox.pagou.ai/v2/transactions/tr_1001 \
  --header "Authorization: Bearer YOUR_SANDBOX_TOKEN"

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Common error

Status 409 
{
  "type": "https://api.pagou.ai/problems/conflict",
  "title": "Conflict",
  "status": 409,
  "detail": "A transaction with external_ref order_1001 already exists."
}
Fix: reuse the same external_ref only for the same logical payment attempt. If the network outcome is unclear, reconcile before creating a new transaction.

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TypeScript SDK equivalent

import { Client } from "@pagouai/api-sdk";

const client = new Client({
  apiKey: process.env.PAGOU_API_KEY!,
  environment: "sandbox",
});

const created = await client.transactions.create({
  external_ref: "order_1001",
  amount: 1500,
  currency: "BRL",
  method: "pix",
  notify_url: "https://merchant.example/webhooks/pagou",
  buyer: {
    name: "Ada Lovelace",
    email: "ada@example.com",
    document: { type: "CPF", number: "12345678901" },
  },
  products: [{ name: "Starter order", price: 1500, quantity: 1 }],
});

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Next steps