Create or Update Custom Interest-free/Fixed installments Configuration

⚠️
IMPORTANT
To follow the steps below, it is essential to have the corresponding Authorization Token. For more information, please refer to the following documentation page: Authorization Token

Create or Update Custom Interest-free/Fixed installments Configuration

💻
Visit our API Reference to test this endpoint.

Endpoint

POST {{baseURL}}/api/cards/msi-configuration
POST https://sandbox.ecartpay.com/api/cards/msi-configuration

Request:

curl --request POST \
     --url https://sandbox.ecartpay.com/api/cards/msi-configuration \
     --header 'Authorization: eyJhbGciOiJIUzUxMiIsInR5cCI6IkpXVCJ9...' \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
{
  "amex_fixed_installments": true,
  "commissions": [
    {
      "installments": 3,
      "minimum_amount": 399,
      "maximum_amount": 50000,
      "is_active": true,
      "fixed_installments": true
    },
    {
      "installments": 6,
      "fixed_installments": true,
      "is_active": true,
      "maximum_amount": 50000,
      "minimum_amount": 600
    },
    {
      "installments": 9,
      "minimum_amount": 900,
      "maximum_amount": 50000,
      "is_active": true,
      "fixed_installments": true
    },
    {
      "installments": 12,
      "minimum_amount": 1200,
      "maximum_amount": 50000,
      "is_active": true,
      "fixed_installments": true
    },
    {
      "installments": 18,
      "minimum_amount": 1800,
      "is_active": true,
      "fixed_installments": true,
      "maximum_amount": 50000
    }
  ]
}
'

Response:

{
  "id": "68d17961e35e6df72dd5d5ba",
  "account_id": "68a4c3150b28a9584305a2a6",
  "gateway": "ecartpay",
  "brands": [],
  "installments": [],
  "institutions": [],
  "is_active": true,
  "commissions": [
    {
      "installments": 3,
      "rate": 3.5,
      "minimum_amount": 399,
      "maximum_amount": 50000,
      "currency": "MXN",
      "start_date": "2024-12-09T00:00:00.000Z",
      "is_active": true,
      "fixed_installments": true,
      "id": "68d4463cc075d4996e153a03"
    },
    {
      "installments": 6,
      "rate": 5.5,
      "minimum_amount": 600,
      "maximum_amount": 50000,
      "currency": "MXN",
      "start_date": "2024-12-09T00:00:00.000Z",
      "is_active": true,
      "fixed_installments": true,
      "id": "68d4463cc075d4996e153a04"
    },
    {
      "installments": 9,
      "rate": 7.5,
      "minimum_amount": 900,
      "maximum_amount": 50000,
      "currency": "MXN",
      "start_date": "2024-12-09T00:00:00.000Z",
      "is_active": true,
      "fixed_installments": true,
      "id": "68d4463cc075d4996e153a05"
    },
    {
      "installments": 12,
      "rate": 13,
      "minimum_amount": 1200,
      "maximum_amount": 50000,
      "currency": "MXN",
      "start_date": "2024-12-09T00:00:00.000Z",
      "is_active": true,
      "fixed_installments": true,
      "id": "68d4463cc075d4996e153a06"
    },
    {
      "installments": 18,
      "rate": 18.25,
      "minimum_amount": 1800,
      "maximum_amount": 50000,
      "currency": "MXN",
      "start_date": "2024-12-09T00:00:00.000Z",
      "is_active": true,
      "fixed_installments": true,
      "id": "68d4463cc075d4996e153a07"
    }
  ],
  "amex_rates": {
    "3": 3.25,
    "6": 6.25,
    "9": 8.25,
    "12": 10.25,
    "15": 13.25,
    "18": 15.25,
    "21": 17.25,
    "24": 19.25
  },
  "amex_fixed_installments": true,
  "created_at": "2025-09-22T16:29:21.222Z",
  "updated_at": "2025-09-24T19:27:56.912Z"
}