curl --request PATCH \
  --url https://api.venlyfinance.com/v1/parties/{partyId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "version": 0,
  "firstName": "Janet",
  "lastName": "Doe"
}
'

import requests

url = "https://api.venlyfinance.com/v1/parties/{partyId}"

payload = {
    "version": 0,
    "firstName": "Janet",
    "lastName": "Doe"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({version: 0, firstName: 'Janet', lastName: 'Doe'})
};

fetch('https://api.venlyfinance.com/v1/parties/{partyId}', 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.venlyfinance.com/v1/parties/{partyId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'version' => 0,
    'firstName' => 'Janet',
    'lastName' => 'Doe'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.venlyfinance.com/v1/parties/{partyId}"

	payload := strings.NewReader("{\n  \"version\": 0,\n  \"firstName\": \"Janet\",\n  \"lastName\": \"Doe\"\n}")

	req, _ := http.NewRequest("PATCH", 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))

}

HttpResponse<String> response = Unirest.patch("https://api.venlyfinance.com/v1/parties/{partyId}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"version\": 0,\n  \"firstName\": \"Janet\",\n  \"lastName\": \"Doe\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.venlyfinance.com/v1/parties/{partyId}")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"version\": 0,\n  \"firstName\": \"Janet\",\n  \"lastName\": \"Doe\"\n}"

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

{
  "success": true,
  "result": {
    "id": "7e3b9c2a-1f4d-4a8b-9c11-2d6e8f0a1b22",
    "externalId": "user-12345",
    "partyType": "INDIVIDUAL",
    "status": "ACTIVE",
    "firstName": "Janet",
    "lastName": "Doe",
    "address": {
      "addressLine1": "1 Example Street",
      "city": "Amsterdam",
      "postalCode": "1011AB",
      "country": "NL"
    },
    "createdAt": "2026-01-15T09:30:00Z",
    "updatedAt": "2026-01-15T09:30:00Z",
    "version": 0
  }
}

{
  "success": false,
  "errors": [
    {
      "code": "invalid-request",
      "message": "The request contains invalid parameters."
    }
  ]
}

{
  "success": false,
  "errors": [
    {
      "code": "unauthenticated",
      "message": "Please authenticate to perform this action."
    }
  ]
}

{
  "success": false,
  "errors": [
    {
      "code": "forbidden",
      "message": "You do not have permission to access this resource."
    }
  ]
}

{
  "success": false,
  "errors": [
    {
      "code": "account-not-found",
      "message": "The requested resource was not found."
    }
  ]
}

{
  "success": false,
  "errors": [
    {
      "code": "concurrent-modification",
      "message": "This request has been modified by another user. Please refresh and try again."
    }
  ]
}

{
  "success": false,
  "errors": [
    {
      "code": "internal-error",
      "message": "An unexpected error occurred. Please try again later."
    }
  ]
}