curl --request POST \
  --url https://api.fincept.in/quantlib/portfolio/risk/contribution \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "weights": [
    0.3,
    0.25,
    0.25,
    0.2
  ],
  "covariance_matrix": [
    [
      0.04,
      0.006,
      0.008,
      0.01
    ],
    [
      0.006,
      0.09,
      0.012,
      0.015
    ],
    [
      0.008,
      0.012,
      0.0625,
      0.018
    ],
    [
      0.01,
      0.015,
      0.018,
      0.16
    ]
  ]
}
'

import requests

url = "https://api.fincept.in/quantlib/portfolio/risk/contribution"

payload = {
    "weights": [0.3, 0.25, 0.25, 0.2],
    "covariance_matrix": [[0.04, 0.006, 0.008, 0.01], [0.006, 0.09, 0.012, 0.015], [0.008, 0.012, 0.0625, 0.018], [0.01, 0.015, 0.018, 0.16]]
}
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({
    weights: [0.3, 0.25, 0.25, 0.2],
    covariance_matrix: [
      [0.04, 0.006, 0.008, 0.01],
      [0.006, 0.09, 0.012, 0.015],
      [0.008, 0.012, 0.0625, 0.018],
      [0.01, 0.015, 0.018, 0.16]
    ]
  })
};

fetch('https://api.fincept.in/quantlib/portfolio/risk/contribution', 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/portfolio/risk/contribution",
  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([
    'weights' => [
        0.3,
        0.25,
        0.25,
        0.2
    ],
    'covariance_matrix' => [
        [
                0.04,
                0.006,
                0.008,
                0.01
        ],
        [
                0.006,
                0.09,
                0.012,
                0.015
        ],
        [
                0.008,
                0.012,
                0.0625,
                0.018
        ],
        [
                0.01,
                0.015,
                0.018,
                0.16
        ]
    ]
  ]),
  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/portfolio/risk/contribution"

	payload := strings.NewReader("{\n  \"weights\": [\n    0.3,\n    0.25,\n    0.25,\n    0.2\n  ],\n  \"covariance_matrix\": [\n    [\n      0.04,\n      0.006,\n      0.008,\n      0.01\n    ],\n    [\n      0.006,\n      0.09,\n      0.012,\n      0.015\n    ],\n    [\n      0.008,\n      0.012,\n      0.0625,\n      0.018\n    ],\n    [\n      0.01,\n      0.015,\n      0.018,\n      0.16\n    ]\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/portfolio/risk/contribution")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"weights\": [\n    0.3,\n    0.25,\n    0.25,\n    0.2\n  ],\n  \"covariance_matrix\": [\n    [\n      0.04,\n      0.006,\n      0.008,\n      0.01\n    ],\n    [\n      0.006,\n      0.09,\n      0.012,\n      0.015\n    ],\n    [\n      0.008,\n      0.012,\n      0.0625,\n      0.018\n    ],\n    [\n      0.01,\n      0.015,\n      0.018,\n      0.16\n    ]\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fincept.in/quantlib/portfolio/risk/contribution")

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  \"weights\": [\n    0.3,\n    0.25,\n    0.25,\n    0.2\n  ],\n  \"covariance_matrix\": [\n    [\n      0.04,\n      0.006,\n      0.008,\n      0.01\n    ],\n    [\n      0.006,\n      0.09,\n      0.012,\n      0.015\n    ],\n    [\n      0.008,\n      0.012,\n      0.0625,\n      0.018\n    ],\n    [\n      0.01,\n      0.015,\n      0.018,\n      0.16\n    ]\n  ]\n}"

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

{
  "success": true,
  "data": {
    "absolute_contribution": [
      0.0124,
      0.0186,
      0.0145,
      0.0165
    ],
    "percentage_contribution": [
      0.2,
      0.3,
      0.23,
      0.27
    ],
    "marginal_contribution": [
      0.0413,
      0.0744,
      0.058,
      0.0825
    ],
    "diversification_ratio": 1.4523,
    "effective_n_bets": 3.2456
  }
}

{
  "detail": "Invalid API key"
}

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

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