curl --request POST \
  --url https://apiv3.usecorvex.com.br/stores/external/checkout \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "cart": {
    "token": "uuid-unico-deste-carrinho",
    "currency": "BRL",
    "items": [
      {
        "title": "Nome do produto",
        "quantity": 1,
        "unitPrice": 9990,
        "image": "https://cdn.exemplo.com/produto.jpg"
      }
    ],
    "subtotalPrice": null,
    "totalPrice": null,
    "totalDiscount": 0,
    "requiresShipping": true,
    "discounts": [],
    "metadata": null
  },
  "customer": {
    "name": null,
    "email": null,
    "phone": null,
    "document": null
  },
  "redirect": {
    "successUrl": null,
    "cancelUrl": null
  },
  "metadata": null
}
'

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    cart: {
      token: 'uuid-unico-deste-carrinho',
      currency: 'BRL',
      items: [
        {
          title: 'Nome do produto',
          quantity: 1,
          unitPrice: 9990,
          image: 'https://cdn.exemplo.com/produto.jpg'
        }
      ],
      subtotalPrice: null,
      totalPrice: null,
      totalDiscount: 0,
      requiresShipping: true,
      discounts: [],
      metadata: null
    },
    customer: {name: null, email: null, phone: null, document: null},
    redirect: {successUrl: null, cancelUrl: null},
    metadata: null
  })
};

fetch('https://apiv3.usecorvex.com.br/stores/external/checkout', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://apiv3.usecorvex.com.br/stores/external/checkout"

payload = {
    "cart": {
        "token": "uuid-unico-deste-carrinho",
        "currency": "BRL",
        "items": [
            {
                "title": "Nome do produto",
                "quantity": 1,
                "unitPrice": 9990,
                "image": "https://cdn.exemplo.com/produto.jpg"
            }
        ],
        "subtotalPrice": None,
        "totalPrice": None,
        "totalDiscount": 0,
        "requiresShipping": True,
        "discounts": [],
        "metadata": None
    },
    "customer": {
        "name": None,
        "email": None,
        "phone": None,
        "document": None
    },
    "redirect": {
        "successUrl": None,
        "cancelUrl": None
    },
    "metadata": None
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "success": true,
  "checkoutId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "checkoutUrl": "https://minhaloja.com.br/pay/a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "storeId": "11111111-1111-4111-8111-111111111111",
  "cartToken": "uuid-unico-deste-carrinho"
}

{
  "success": false,
  "error": {
    "code": "INVALID_PAYLOAD",
    "message": "Payload inválido",
    "details": {}
  }
}

{
  "success": false,
  "error": {
    "code": "MISSING_API_KEY",
    "message": "Header x-api-key é obrigatório"
  }
}

{
  "success": false,
  "error": {
    "code": "STORE_INACTIVE",
    "message": "Loja está inativa"
  }
}

{
  "success": false,
  "error": {
    "code": "STORE_NOT_FOUND",
    "message": "Loja não encontrada"
  }
}

{
  "success": false,
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Erro interno ao processar checkout"
  }
}