curl --request POST \
  --url https://api.fincept.in/quantlib/models/hull-white/calibrate \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "kappa": 0.15,
  "sigma": 0.012,
  "r0": 0.025,
  "market_tenors": [
    0.5,
    1,
    2,
    5,
    10
  ],
  "market_rates": [
    0.0275,
    0.03,
    0.0345,
    0.04,
    0.045
  ]
}
'

import requests

url = "https://api.fincept.in/quantlib/models/hull-white/calibrate"

payload = {
    "kappa": 0.15,
    "sigma": 0.012,
    "r0": 0.025,
    "market_tenors": [0.5, 1, 2, 5, 10],
    "market_rates": [0.0275, 0.03, 0.0345, 0.04, 0.045]
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    kappa: 0.15,
    sigma: 0.012,
    r0: 0.025,
    market_tenors: [0.5, 1, 2, 5, 10],
    market_rates: [0.0275, 0.03, 0.0345, 0.04, 0.045]
  })
};

fetch('https://api.fincept.in/quantlib/models/hull-white/calibrate', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.fincept.in/quantlib/models/hull-white/calibrate",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'kappa' => 0.15,
    'sigma' => 0.012,
    'r0' => 0.025,
    'market_tenors' => [
        0.5,
        1,
        2,
        5,
        10
    ],
    'market_rates' => [
        0.0275,
        0.03,
        0.0345,
        0.04,
        0.045
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.fincept.in/quantlib/models/hull-white/calibrate"

	payload := strings.NewReader("{\n  \"kappa\": 0.15,\n  \"sigma\": 0.012,\n  \"r0\": 0.025,\n  \"market_tenors\": [\n    0.5,\n    1,\n    2,\n    5,\n    10\n  ],\n  \"market_rates\": [\n    0.0275,\n    0.03,\n    0.0345,\n    0.04,\n    0.045\n  ]\n}")

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

	req.Header.Add("X-API-Key", "<api-key>")
	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))

}

HttpResponse<String> response = Unirest.post("https://api.fincept.in/quantlib/models/hull-white/calibrate")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"kappa\": 0.15,\n  \"sigma\": 0.012,\n  \"r0\": 0.025,\n  \"market_tenors\": [\n    0.5,\n    1,\n    2,\n    5,\n    10\n  ],\n  \"market_rates\": [\n    0.0275,\n    0.03,\n    0.0345,\n    0.04,\n    0.045\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fincept.in/quantlib/models/hull-white/calibrate")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"kappa\": 0.15,\n  \"sigma\": 0.012,\n  \"r0\": 0.025,\n  \"market_tenors\": [\n    0.5,\n    1,\n    2,\n    5,\n    10\n  ],\n  \"market_rates\": [\n    0.0275,\n    0.03,\n    0.0345,\n    0.04,\n    0.045\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "success": true,
  "data": {
    "model": "hull_white",
    "calibrated_bonds": [
      {
        "maturity": 0.5,
        "bond_price": 98.64
      },
      {
        "maturity": 1,
        "bond_price": 97.04
      },
      {
        "maturity": 2,
        "bond_price": 93.32
      },
      {
        "maturity": 5,
        "bond_price": 81.87
      },
      {
        "maturity": 10,
        "bond_price": 64.07
      }
    ]
  }
}

{
  "detail": "Invalid API key"
}

{
  "detail": "Insufficient credits. This endpoint requires 5 credits. Current balance: 2 credits."
}

{
  "detail": [
    {
      "loc": [
        "body",
        "kappa"
      ],
      "msg": "field required",
      "type": "value_error.missing"
    }
  ]
}