Ao criar uma transação, você pode passar uma URL para receber eventos em seu servidor quando uma transação for atualizada, através do campo postbackUrl. O formato do payload que você receberá nessa URL segue o formato abaixo:

Transação

{
    "id": 243,
    "type": "transaction",
    "objectId": "637",
    "url": "https://sua-api.com.br/webhooks",
    "data": {
        "id": 637,
        "paymentMethod": "credit_card",
        "installments": 1,
        "amount": 1000,
        "status": "refunded",
        "acquirerType": "getnet",
        "externalId": "e2758740-6a76-4741-b9df-a4afee7ffd42",
        "postbackUrl": "https://sua-api.com.br/webhooks",
        "secureId": "bbabfe1f-b594-4089-8e00-ec2eb3af5df0",
        "secureUrl": "https://link.sandbox.001pay.com.br/pagar/bbabfe1f-b594-4089-8e00-ec2eb3af5df0",
        "createdAt": "2022-01-19T20:03:45.000Z",
        "updatedAt": "2022-01-19T20:03:45.000Z",
        "items": [
            {
                "title": "Camiseta Branca",
                "quantity": 1,
                "tangible": true,
                "unitPrice": 990,
                "externalRef": null
            }
        ],
        "customer": {
            "id": 27,
            "name": "Barry Allen",
            "email": "[email protected]",
            "phone": "11999999999",
            "address": {
                "id": 825,
                "city": "São Paulo",
                "state": "SP",
                "street": "Avenida Paulista",
                "country": "br",
                "zipCode": "01311941",
                "complement": null,
                "neighborhood": "Bela Vista",
                "streetNumber": "807"
            },
            "revenue": {
                "pixCount": 0,
                "cardCount": 35,
                "createdAt": "2021-12-31T04:45:28.000Z",
                "pixAmount": 0,
                "cardAmount": 71577,
                "totalCount": 35,
                "boletoCount": 0,
                "refundCount": 10,
                "totalAmount": 71577,
                "boletoAmount": 0,
                "refundAmount": 34057,
                "chargebackCount": 0,
                "chargebackAmount": 0
            },
            "document": {
                "id": 72,
                "type": "cpf",
                "number": "12345678901"
            },
            "birthdate": null,
            "createdAt": "2021-12-31T04:45:29.000Z",
            "externalRef": null,
            "acquirersKeys": {
                "id": 68,
                "iugu": null,
                "moip": null,
                "getnet": null,
                "pagarme": null,
                "mundi_pagarme": null
            }
        },
        "shipping": {
            "id": 350,
            "fee": 0,
            "address": {
                "id": 826,
                "city": "São Paulo",
                "state": "SP",
                "street": "Avenida Paulista",
                "country": "br",
                "zipCode": "01311941",
                "complement": null,
                "neighborhood": "Bela Vista",
                "streetNumber": "807"
            }
        },
        "card": {
            "id": 133,
            "brand": "mastercard",
            "createdAt": "2022-01-17T19:47:21.000Z",
            "holderName": "BARRY ALLEN",
            "lastDigits": "0001",
            "acquirerType": "getnet",
            "expirationDate": "03/28"
        },
        "pix": null,
        "boleto": null,
        "fee": {
            "fixedAmount": 202,
            "estimatedFee": 237,
            "estimatedProfit": 763,
            "spreadPercentage": 3.5
        },
        "ip": null,
        "refunds": [
            {
                "amount": 1000,
                "createdAt": "2022-01-19T20:04:10.000Z"
            }
        ],
        "sendEmail": false,
        "traceable": false,
        "delivery": null,
        "metadata": null,
        "billingId": null,
        "companyId": 34,
        "refusedReason": null,
        "subscriptionId": null
    }
}

Checkout

{
    "id": 270,
    "type": "checkout",
    "objectId": "13",
    "url": "https://suaapi.com.br",
    "data": {
        "id": 13,
        "amount": 5000,
        "secureId": "82da9cff-32e3-42b4-a883-fa13c9a3a81f",
        "secureUrl": "https://link.sandbox.001pay.com.br/checkout/82da9cff-32e3-42b4-a883-fa13c9a3a81f",
        "items": [
            {
                "title": "Sanduíche",
                "quantity": 3,
                "tangible": true,
                "unitPrice": 1300,
                "externalRef": null
            },
            {
                "title": "Coca-Cola 350ml",
                "quantity": 2,
                "tangible": true,
                "unitPrice": 550,
                "externalRef": null
            }
        ],
        "settings": {
            "pix": {
                "enabled": true,
                "expiresInDays": 2
            },
            "card": {
                "enabled": true,
                "maxInstallments": 3,
                "freeInstallments": 1
            },
            "boleto": {
                "enabled": false,
                "expiresInDays": 2
            },
            "traceable": false,
            "requestPhone": false,
            "requestAddress": false,
            "requestDocument": false,
            "defaultPaymentMethod": "credit_card"
        },
        "companyId": 67,
        "createdAt": "2022-03-12T03:36:50.000Z",
        "description": null,
        "postbackUrl": "https://suaapi.com.br",
        "transaction": {
            "id": 805,
            "amount": 5000,
            "paymentMethod": "pix",
            "status": "waiting_payment",
            "installments": 1,
            "metadata": null,
            "secureId": "677688c8-2c7e-489d-9db8-ad2662514fec",
            "secureUrl": "https://link.sandbox.001pay.com.br/pagar/677688c8-2c7e-489d-9db8-ad2662514fec",
            "checkoutId": 13,
            "tenantId": 29,
            "billingId": null,
            "companyId": 67,
            "createdAt": "2022-03-12T03:37:11.000Z",
            "sendEmail": true,
            "traceable": false,
            "updatedAt": "2022-03-12T03:37:11.000Z",
            "externalId": "16388150",
            "postbackUrl": null,
            "acquirerType": "pagarme",
            "acquirerStatus": "waiting_payment",
            "subscriptionId": null,
            "ip": null
        }
    }
}