curl --request POST \
  --url https://api.fincept.in/quantlib/pricing/black76/swaption \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "forward_swap_rate": 0.04,
  "strike": 0.045,
  "annuity": 4.5,
  "volatility": 0.18,
  "t_expiry": 2,
  "is_payer": true,
  "notional": 1000000
}
'

import requests

url = "https://api.fincept.in/quantlib/pricing/black76/swaption"

payload = {
    "forward_swap_rate": 0.04,
    "strike": 0.045,
    "annuity": 4.5,
    "volatility": 0.18,
    "t_expiry": 2,
    "is_payer": True,
    "notional": 1000000
}
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({
    forward_swap_rate: 0.04,
    strike: 0.045,
    annuity: 4.5,
    volatility: 0.18,
    t_expiry: 2,
    is_payer: true,
    notional: 1000000
  })
};

fetch('https://api.fincept.in/quantlib/pricing/black76/swaption', 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/pricing/black76/swaption",
  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([
    'forward_swap_rate' => 0.04,
    'strike' => 0.045,
    'annuity' => 4.5,
    'volatility' => 0.18,
    't_expiry' => 2,
    'is_payer' => true,
    'notional' => 1000000
  ]),
  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/pricing/black76/swaption"

	payload := strings.NewReader("{\n  \"forward_swap_rate\": 0.04,\n  \"strike\": 0.045,\n  \"annuity\": 4.5,\n  \"volatility\": 0.18,\n  \"t_expiry\": 2,\n  \"is_payer\": true,\n  \"notional\": 1000000\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/pricing/black76/swaption")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"forward_swap_rate\": 0.04,\n  \"strike\": 0.045,\n  \"annuity\": 4.5,\n  \"volatility\": 0.18,\n  \"t_expiry\": 2,\n  \"is_payer\": true,\n  \"notional\": 1000000\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fincept.in/quantlib/pricing/black76/swaption")

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  \"forward_swap_rate\": 0.04,\n  \"strike\": 0.045,\n  \"annuity\": 4.5,\n  \"volatility\": 0.18,\n  \"t_expiry\": 2,\n  \"is_payer\": true,\n  \"notional\": 1000000\n}"

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

{
  "success": true,
  "data": {
    "swaption_price": 12345.67,
    "is_payer": true
  }
}

{
  "detail": "Invalid API key"
}

{
  "detail": "Insufficient credits. This endpoint costs 2 credits per request."
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}