curl --request PATCH \
  --url https://api.monaco.com/v1/opportunities/{opportunity_id} \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Acme Corp - Enterprise License",
  "owner_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "stage": "Negotiation",
  "estimated_value": {
    "currency_code": "USD",
    "amount": 50000
  },
  "estimated_close_date": "2025-09-30",
  "actual_close_date": "2025-10-15",
  "notes": "Follow up after Q3 board meeting",
  "tags": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}
'

import requests

url = "https://api.monaco.com/v1/opportunities/{opportunity_id}"

payload = {
    "name": "Acme Corp - Enterprise License",
    "owner_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "stage": "Negotiation",
    "estimated_value": {
        "currency_code": "USD",
        "amount": 50000
    },
    "estimated_close_date": "2025-09-30",
    "actual_close_date": "2025-10-15",
    "notes": "Follow up after Q3 board meeting",
    "tags": ["3c90c3cc-0d44-4b50-8888-8dd25736052a"]
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'Acme Corp - Enterprise License',
    owner_user_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    stage: 'Negotiation',
    estimated_value: {currency_code: 'USD', amount: 50000},
    estimated_close_date: '2025-09-30',
    actual_close_date: '2025-10-15',
    notes: 'Follow up after Q3 board meeting',
    tags: ['3c90c3cc-0d44-4b50-8888-8dd25736052a']
  })
};

fetch('https://api.monaco.com/v1/opportunities/{opportunity_id}', 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.monaco.com/v1/opportunities/{opportunity_id}",
  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([
    'name' => 'Acme Corp - Enterprise License',
    'owner_user_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'stage' => 'Negotiation',
    'estimated_value' => [
        'currency_code' => 'USD',
        'amount' => 50000
    ],
    'estimated_close_date' => '2025-09-30',
    'actual_close_date' => '2025-10-15',
    'notes' => 'Follow up after Q3 board meeting',
    'tags' => [
        '3c90c3cc-0d44-4b50-8888-8dd25736052a'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "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.monaco.com/v1/opportunities/{opportunity_id}"

	payload := strings.NewReader("{\n  \"name\": \"Acme Corp - Enterprise License\",\n  \"owner_user_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"stage\": \"Negotiation\",\n  \"estimated_value\": {\n    \"currency_code\": \"USD\",\n    \"amount\": 50000\n  },\n  \"estimated_close_date\": \"2025-09-30\",\n  \"actual_close_date\": \"2025-10-15\",\n  \"notes\": \"Follow up after Q3 board meeting\",\n  \"tags\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ]\n}")

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

	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.monaco.com/v1/opportunities/{opportunity_id}")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"Acme Corp - Enterprise License\",\n  \"owner_user_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"stage\": \"Negotiation\",\n  \"estimated_value\": {\n    \"currency_code\": \"USD\",\n    \"amount\": 50000\n  },\n  \"estimated_close_date\": \"2025-09-30\",\n  \"actual_close_date\": \"2025-10-15\",\n  \"notes\": \"Follow up after Q3 board meeting\",\n  \"tags\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.monaco.com/v1/opportunities/{opportunity_id}")

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

request = Net::HTTP::Patch.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"Acme Corp - Enterprise License\",\n  \"owner_user_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"stage\": \"Negotiation\",\n  \"estimated_value\": {\n    \"currency_code\": \"USD\",\n    \"amount\": 50000\n  },\n  \"estimated_close_date\": \"2025-09-30\",\n  \"actual_close_date\": \"2025-10-15\",\n  \"notes\": \"Follow up after Q3 board meeting\",\n  \"tags\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ]\n}"

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

{
  "data": {
    "id": "opp_abc123",
    "account_id": "acc_def456",
    "name": "Acme Corp - Enterprise License",
    "owner": {
      "id": "usr_abc123",
      "first_name": "Jane",
      "last_name": "Smith"
    },
    "stage": "Closed Won",
    "estimated_value": {
      "currency_code": "USD",
      "amount": 50000
    },
    "estimated_close_date": "2025-09-30",
    "actual_close_date": "2025-10-15",
    "summary": "Enterprise deal with strong champion. Procurement review in progress.",
    "risks": [
      "Budget constraints",
      "Competing vendor evaluation"
    ],
    "notes": "Follow up after Q3 board meeting",
    "tags": [
      "High Priority"
    ],
    "last_activity_at": "2025-08-20T14:30:00Z",
    "custom_field_550e8400-e29b-41d4-a716-446655440001": "outbound",
    "updated_at": "2026-04-21T12:00:00Z",
    "created_at": "2025-06-01T09:00:00Z"
  },
  "meta": {
    "timestamp": "2026-04-21T12:00:00Z"
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>"
  }
}