curl --request POST \
  --url https://lender.sandbox.lerian.net/api/v1/loan-applications/preview-schedule \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "annualInterestRate": "0.12000000",
  "dayCountConvention": "ACT/365",
  "jurisdictionCode": "BR",
  "principalAmount": "50000.00",
  "startDate": "2026-06-14T00:00:00Z",
  "termMonths": 24,
  "firstDueDate": "2026-03-10",
  "gracePeriodDays": 30,
  "loanProductVersionId": "018f4e4e-7a3f-7c2e-9a1b-2c3d4e5f6071"
}
'

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://lender.sandbox.lerian.net/api/v1/loan-applications/preview-schedule"

	payload := strings.NewReader("{\n  \"annualInterestRate\": \"0.12000000\",\n  \"dayCountConvention\": \"ACT/365\",\n  \"jurisdictionCode\": \"BR\",\n  \"principalAmount\": \"50000.00\",\n  \"startDate\": \"2026-06-14T00:00:00Z\",\n  \"termMonths\": 24,\n  \"firstDueDate\": \"2026-03-10\",\n  \"gracePeriodDays\": 30,\n  \"loanProductVersionId\": \"018f4e4e-7a3f-7c2e-9a1b-2c3d4e5f6071\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    annualInterestRate: '0.12000000',
    dayCountConvention: 'ACT/365',
    jurisdictionCode: 'BR',
    principalAmount: '50000.00',
    startDate: '2026-06-14T00:00:00Z',
    termMonths: 24,
    firstDueDate: '2026-03-10',
    gracePeriodDays: 30,
    loanProductVersionId: '018f4e4e-7a3f-7c2e-9a1b-2c3d4e5f6071'
  })
};

fetch('https://lender.sandbox.lerian.net/api/v1/loan-applications/preview-schedule', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://lender.sandbox.lerian.net/api/v1/loan-applications/preview-schedule"

payload = {
    "annualInterestRate": "0.12000000",
    "dayCountConvention": "ACT/365",
    "jurisdictionCode": "BR",
    "principalAmount": "50000.00",
    "startDate": "2026-06-14T00:00:00Z",
    "termMonths": 24,
    "firstDueDate": "2026-03-10",
    "gracePeriodDays": 30,
    "loanProductVersionId": "018f4e4e-7a3f-7c2e-9a1b-2c3d4e5f6071"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "calendarReference": "<string>",
  "dayCountConvention": "ACT/365",
  "installments": [
    {
      "dueDate": "2026-06-14",
      "interestAmount": "234.56",
      "number": 1,
      "principalAmount": "1000.00",
      "remainingBalance": "49000.00",
      "totalAmount": "1234.56"
    }
  ],
  "jurisdictionCode": "BR",
  "profileVersion": "1.0.0",
  "totalInterest": "4321.00",
  "totalPrincipal": "50000.00",
  "effectiveCostPreview": {
    "effectiveCostAnnualPct": "12.00000000",
    "effectiveCostMonthlyPct": "0.94888100",
    "memoryOfCalculation": {},
    "methodId": "<string>",
    "rateTableSnapshot": {}
  },
  "jurisdictionExtensions": {
    "body": {},
    "overlayKey": "<string>"
  },
  "scheduleOfferSnapshotId": "6f2b9a41-0c3d-5e7f-9a12-4b8c6d0e1f37"
}

{
  "code": "<string>",
  "detail": "Property foo is required but is missing.",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "https://example.com/error-log/abc123",
  "status": 400,
  "title": "Bad Request",
  "type": "https://example.com/errors/example",
  "upstream": {
    "code": "E4001",
    "message": "account not found at provider"
  }
}

{
  "code": "<string>",
  "detail": "Property foo is required but is missing.",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "https://example.com/error-log/abc123",
  "status": 400,
  "title": "Bad Request",
  "type": "https://example.com/errors/example",
  "upstream": {
    "code": "E4001",
    "message": "account not found at provider"
  }
}

{
  "code": "<string>",
  "detail": "Property foo is required but is missing.",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "https://example.com/error-log/abc123",
  "status": 400,
  "title": "Bad Request",
  "type": "https://example.com/errors/example",
  "upstream": {
    "code": "E4001",
    "message": "account not found at provider"
  }
}

{
  "code": "<string>",
  "detail": "Property foo is required but is missing.",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "https://example.com/error-log/abc123",
  "status": 400,
  "title": "Bad Request",
  "type": "https://example.com/errors/example",
  "upstream": {
    "code": "E4001",
    "message": "account not found at provider"
  }
}

{
  "code": "<string>",
  "detail": "Property foo is required but is missing.",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "https://example.com/error-log/abc123",
  "status": 400,
  "title": "Bad Request",
  "type": "https://example.com/errors/example",
  "upstream": {
    "code": "E4001",
    "message": "account not found at provider"
  }
}

{
  "code": "<string>",
  "detail": "Property foo is required but is missing.",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "https://example.com/error-log/abc123",
  "status": 400,
  "title": "Bad Request",
  "type": "https://example.com/errors/example",
  "upstream": {
    "code": "E4001",
    "message": "account not found at provider"
  }
}