Create an Opportunity
curl --request POST \
--url https://api.monaco.com/v1/opportunities/ \
--header 'Content-Type: application/json' \
--data '
{
"name": "Acme Corp - Enterprise License",
"account_id": "550e8400-e29b-41d4-a716-446655440000",
"owner_user_id": "550e8400-e29b-41d4-a716-446655440001",
"stage": "closed-won",
"estimated_value": {
"currency_code": "USD",
"amount": 50000
},
"estimated_close_date": "2025-09-30",
"notes": "Follow up after Q3 board meeting",
"tags": [
"550e8400-e29b-41d4-a716-446655440002"
],
"idempotency_key": "550e8400-e29b-41d4-a716-446655440003",
"custom_field_550e8400-e29b-41d4-a716-446655440001": "outbound"
}
'import requests
url = "https://api.monaco.com/v1/opportunities/"
payload = {
"name": "Acme Corp - Enterprise License",
"account_id": "550e8400-e29b-41d4-a716-446655440000",
"owner_user_id": "550e8400-e29b-41d4-a716-446655440001",
"stage": "closed-won",
"estimated_value": {
"currency_code": "USD",
"amount": 50000
},
"estimated_close_date": "2025-09-30",
"notes": "Follow up after Q3 board meeting",
"tags": ["550e8400-e29b-41d4-a716-446655440002"],
"idempotency_key": "550e8400-e29b-41d4-a716-446655440003",
"custom_field_550e8400-e29b-41d4-a716-446655440001": "outbound"
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
name: 'Acme Corp - Enterprise License',
account_id: '550e8400-e29b-41d4-a716-446655440000',
owner_user_id: '550e8400-e29b-41d4-a716-446655440001',
stage: 'closed-won',
estimated_value: {currency_code: 'USD', amount: 50000},
estimated_close_date: '2025-09-30',
notes: 'Follow up after Q3 board meeting',
tags: ['550e8400-e29b-41d4-a716-446655440002'],
idempotency_key: '550e8400-e29b-41d4-a716-446655440003',
'custom_field_550e8400-e29b-41d4-a716-446655440001': 'outbound'
})
};
fetch('https://api.monaco.com/v1/opportunities/', 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/",
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([
'name' => 'Acme Corp - Enterprise License',
'account_id' => '550e8400-e29b-41d4-a716-446655440000',
'owner_user_id' => '550e8400-e29b-41d4-a716-446655440001',
'stage' => 'closed-won',
'estimated_value' => [
'currency_code' => 'USD',
'amount' => 50000
],
'estimated_close_date' => '2025-09-30',
'notes' => 'Follow up after Q3 board meeting',
'tags' => [
'550e8400-e29b-41d4-a716-446655440002'
],
'idempotency_key' => '550e8400-e29b-41d4-a716-446655440003',
'custom_field_550e8400-e29b-41d4-a716-446655440001' => 'outbound'
]),
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/"
payload := strings.NewReader("{\n \"name\": \"Acme Corp - Enterprise License\",\n \"account_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"owner_user_id\": \"550e8400-e29b-41d4-a716-446655440001\",\n \"stage\": \"closed-won\",\n \"estimated_value\": {\n \"currency_code\": \"USD\",\n \"amount\": 50000\n },\n \"estimated_close_date\": \"2025-09-30\",\n \"notes\": \"Follow up after Q3 board meeting\",\n \"tags\": [\n \"550e8400-e29b-41d4-a716-446655440002\"\n ],\n \"idempotency_key\": \"550e8400-e29b-41d4-a716-446655440003\",\n \"custom_field_550e8400-e29b-41d4-a716-446655440001\": \"outbound\"\n}")
req, _ := http.NewRequest("POST", 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.post("https://api.monaco.com/v1/opportunities/")
.header("Content-Type", "application/json")
.body("{\n \"name\": \"Acme Corp - Enterprise License\",\n \"account_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"owner_user_id\": \"550e8400-e29b-41d4-a716-446655440001\",\n \"stage\": \"closed-won\",\n \"estimated_value\": {\n \"currency_code\": \"USD\",\n \"amount\": 50000\n },\n \"estimated_close_date\": \"2025-09-30\",\n \"notes\": \"Follow up after Q3 board meeting\",\n \"tags\": [\n \"550e8400-e29b-41d4-a716-446655440002\"\n ],\n \"idempotency_key\": \"550e8400-e29b-41d4-a716-446655440003\",\n \"custom_field_550e8400-e29b-41d4-a716-446655440001\": \"outbound\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.monaco.com/v1/opportunities/")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"name\": \"Acme Corp - Enterprise License\",\n \"account_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"owner_user_id\": \"550e8400-e29b-41d4-a716-446655440001\",\n \"stage\": \"closed-won\",\n \"estimated_value\": {\n \"currency_code\": \"USD\",\n \"amount\": 50000\n },\n \"estimated_close_date\": \"2025-09-30\",\n \"notes\": \"Follow up after Q3 board meeting\",\n \"tags\": [\n \"550e8400-e29b-41d4-a716-446655440002\"\n ],\n \"idempotency_key\": \"550e8400-e29b-41d4-a716-446655440003\",\n \"custom_field_550e8400-e29b-41d4-a716-446655440001\": \"outbound\"\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",
"risks": [],
"notes": "Follow up after Q3 board meeting",
"tags": [],
"updated_at": "2026-04-21T12:00:00Z",
"created_at": "2026-04-21T12:00:00Z",
"custom_field_550e8400-e29b-41d4-a716-446655440001": "outbound"
},
"meta": {
"timestamp": "2026-04-21T12:00:00Z"
}
}{
"error": {
"code": "<string>",
"message": "<string>"
}
}Opportunities
Create an Opportunity
Creates a new opportunity associated with an existing account. Pass an idempotency_key to safely retry creation.
POST
/
v1
/
opportunities
/
Create an Opportunity
curl --request POST \
--url https://api.monaco.com/v1/opportunities/ \
--header 'Content-Type: application/json' \
--data '
{
"name": "Acme Corp - Enterprise License",
"account_id": "550e8400-e29b-41d4-a716-446655440000",
"owner_user_id": "550e8400-e29b-41d4-a716-446655440001",
"stage": "closed-won",
"estimated_value": {
"currency_code": "USD",
"amount": 50000
},
"estimated_close_date": "2025-09-30",
"notes": "Follow up after Q3 board meeting",
"tags": [
"550e8400-e29b-41d4-a716-446655440002"
],
"idempotency_key": "550e8400-e29b-41d4-a716-446655440003",
"custom_field_550e8400-e29b-41d4-a716-446655440001": "outbound"
}
'import requests
url = "https://api.monaco.com/v1/opportunities/"
payload = {
"name": "Acme Corp - Enterprise License",
"account_id": "550e8400-e29b-41d4-a716-446655440000",
"owner_user_id": "550e8400-e29b-41d4-a716-446655440001",
"stage": "closed-won",
"estimated_value": {
"currency_code": "USD",
"amount": 50000
},
"estimated_close_date": "2025-09-30",
"notes": "Follow up after Q3 board meeting",
"tags": ["550e8400-e29b-41d4-a716-446655440002"],
"idempotency_key": "550e8400-e29b-41d4-a716-446655440003",
"custom_field_550e8400-e29b-41d4-a716-446655440001": "outbound"
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
name: 'Acme Corp - Enterprise License',
account_id: '550e8400-e29b-41d4-a716-446655440000',
owner_user_id: '550e8400-e29b-41d4-a716-446655440001',
stage: 'closed-won',
estimated_value: {currency_code: 'USD', amount: 50000},
estimated_close_date: '2025-09-30',
notes: 'Follow up after Q3 board meeting',
tags: ['550e8400-e29b-41d4-a716-446655440002'],
idempotency_key: '550e8400-e29b-41d4-a716-446655440003',
'custom_field_550e8400-e29b-41d4-a716-446655440001': 'outbound'
})
};
fetch('https://api.monaco.com/v1/opportunities/', 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/",
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([
'name' => 'Acme Corp - Enterprise License',
'account_id' => '550e8400-e29b-41d4-a716-446655440000',
'owner_user_id' => '550e8400-e29b-41d4-a716-446655440001',
'stage' => 'closed-won',
'estimated_value' => [
'currency_code' => 'USD',
'amount' => 50000
],
'estimated_close_date' => '2025-09-30',
'notes' => 'Follow up after Q3 board meeting',
'tags' => [
'550e8400-e29b-41d4-a716-446655440002'
],
'idempotency_key' => '550e8400-e29b-41d4-a716-446655440003',
'custom_field_550e8400-e29b-41d4-a716-446655440001' => 'outbound'
]),
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/"
payload := strings.NewReader("{\n \"name\": \"Acme Corp - Enterprise License\",\n \"account_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"owner_user_id\": \"550e8400-e29b-41d4-a716-446655440001\",\n \"stage\": \"closed-won\",\n \"estimated_value\": {\n \"currency_code\": \"USD\",\n \"amount\": 50000\n },\n \"estimated_close_date\": \"2025-09-30\",\n \"notes\": \"Follow up after Q3 board meeting\",\n \"tags\": [\n \"550e8400-e29b-41d4-a716-446655440002\"\n ],\n \"idempotency_key\": \"550e8400-e29b-41d4-a716-446655440003\",\n \"custom_field_550e8400-e29b-41d4-a716-446655440001\": \"outbound\"\n}")
req, _ := http.NewRequest("POST", 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.post("https://api.monaco.com/v1/opportunities/")
.header("Content-Type", "application/json")
.body("{\n \"name\": \"Acme Corp - Enterprise License\",\n \"account_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"owner_user_id\": \"550e8400-e29b-41d4-a716-446655440001\",\n \"stage\": \"closed-won\",\n \"estimated_value\": {\n \"currency_code\": \"USD\",\n \"amount\": 50000\n },\n \"estimated_close_date\": \"2025-09-30\",\n \"notes\": \"Follow up after Q3 board meeting\",\n \"tags\": [\n \"550e8400-e29b-41d4-a716-446655440002\"\n ],\n \"idempotency_key\": \"550e8400-e29b-41d4-a716-446655440003\",\n \"custom_field_550e8400-e29b-41d4-a716-446655440001\": \"outbound\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.monaco.com/v1/opportunities/")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"name\": \"Acme Corp - Enterprise License\",\n \"account_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"owner_user_id\": \"550e8400-e29b-41d4-a716-446655440001\",\n \"stage\": \"closed-won\",\n \"estimated_value\": {\n \"currency_code\": \"USD\",\n \"amount\": 50000\n },\n \"estimated_close_date\": \"2025-09-30\",\n \"notes\": \"Follow up after Q3 board meeting\",\n \"tags\": [\n \"550e8400-e29b-41d4-a716-446655440002\"\n ],\n \"idempotency_key\": \"550e8400-e29b-41d4-a716-446655440003\",\n \"custom_field_550e8400-e29b-41d4-a716-446655440001\": \"outbound\"\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",
"risks": [],
"notes": "Follow up after Q3 board meeting",
"tags": [],
"updated_at": "2026-04-21T12:00:00Z",
"created_at": "2026-04-21T12:00:00Z",
"custom_field_550e8400-e29b-41d4-a716-446655440001": "outbound"
},
"meta": {
"timestamp": "2026-04-21T12:00:00Z"
}
}{
"error": {
"code": "<string>",
"message": "<string>"
}
}Body
application/json
Request body for creating an opportunity via POST.
Name of the opportunity
Example:
"Acme Corp - Enterprise License"
ID of the account to associate the opportunity with
User ID to assign as opportunity owner
Pipeline stage key for the opportunity
Example:
"Negotiation"
Estimated monetary value of the opportunity
Show child attributes
Show child attributes
Expected close date (YYYY-MM-DD)
Example:
"2025-09-30"
Notes about the opportunity
Example:
"Follow up after Q3 board meeting"
List of tag IDs to associate with the opportunity
Client-provided idempotency key to prevent duplicate creation
⌘I