curl --request POST \
  --url https://app.usequeue.com/api/v1/projects/{project_id}/invoices \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "invoice_items": [
    {
      "token": "b4bf704d-ef6e-4c40-856b-d5ace731698bxx",
      "amount": 100,
      "interval": null,
      "quantity": 1,
      "frequency": null,
      "description": "Item 1"
    },
    {
      "token": "f9fef62c-0fe9-4117-a96a-96502f71c4f1xx",
      "amount": 200,
      "interval": "month",
      "quantity": 1,
      "frequency": null,
      "description": "Item 2"
    }
  ]
}
'

import requests

url = "https://app.usequeue.com/api/v1/projects/{project_id}/invoices"

payload = { "invoice_items": [
        {
            "token": "b4bf704d-ef6e-4c40-856b-d5ace731698bxx",
            "amount": 100,
            "interval": None,
            "quantity": 1,
            "frequency": None,
            "description": "Item 1"
        },
        {
            "token": "f9fef62c-0fe9-4117-a96a-96502f71c4f1xx",
            "amount": 200,
            "interval": "month",
            "quantity": 1,
            "frequency": None,
            "description": "Item 2"
        }
    ] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    invoice_items: [
      {
        token: 'b4bf704d-ef6e-4c40-856b-d5ace731698bxx',
        amount: 100,
        interval: null,
        quantity: 1,
        frequency: null,
        description: 'Item 1'
      },
      {
        token: 'f9fef62c-0fe9-4117-a96a-96502f71c4f1xx',
        amount: 200,
        interval: 'month',
        quantity: 1,
        frequency: null,
        description: 'Item 2'
      }
    ]
  })
};

fetch('https://app.usequeue.com/api/v1/projects/{project_id}/invoices', 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://app.usequeue.com/api/v1/projects/{project_id}/invoices",
  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([
    'invoice_items' => [
        [
                'token' => 'b4bf704d-ef6e-4c40-856b-d5ace731698bxx',
                'amount' => 100,
                'interval' => null,
                'quantity' => 1,
                'frequency' => null,
                'description' => 'Item 1'
        ],
        [
                'token' => 'f9fef62c-0fe9-4117-a96a-96502f71c4f1xx',
                'amount' => 200,
                'interval' => 'month',
                'quantity' => 1,
                'frequency' => null,
                'description' => 'Item 2'
        ]
    ]
  ]),
  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://app.usequeue.com/api/v1/projects/{project_id}/invoices"

	payload := strings.NewReader("{\n  \"invoice_items\": [\n    {\n      \"token\": \"b4bf704d-ef6e-4c40-856b-d5ace731698bxx\",\n      \"amount\": 100,\n      \"interval\": null,\n      \"quantity\": 1,\n      \"frequency\": null,\n      \"description\": \"Item 1\"\n    },\n    {\n      \"token\": \"f9fef62c-0fe9-4117-a96a-96502f71c4f1xx\",\n      \"amount\": 200,\n      \"interval\": \"month\",\n      \"quantity\": 1,\n      \"frequency\": null,\n      \"description\": \"Item 2\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", 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.post("https://app.usequeue.com/api/v1/projects/{project_id}/invoices")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"invoice_items\": [\n    {\n      \"token\": \"b4bf704d-ef6e-4c40-856b-d5ace731698bxx\",\n      \"amount\": 100,\n      \"interval\": null,\n      \"quantity\": 1,\n      \"frequency\": null,\n      \"description\": \"Item 1\"\n    },\n    {\n      \"token\": \"f9fef62c-0fe9-4117-a96a-96502f71c4f1xx\",\n      \"amount\": 200,\n      \"interval\": \"month\",\n      \"quantity\": 1,\n      \"frequency\": null,\n      \"description\": \"Item 2\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.usequeue.com/api/v1/projects/{project_id}/invoices")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"invoice_items\": [\n    {\n      \"token\": \"b4bf704d-ef6e-4c40-856b-d5ace731698bxx\",\n      \"amount\": 100,\n      \"interval\": null,\n      \"quantity\": 1,\n      \"frequency\": null,\n      \"description\": \"Item 1\"\n    },\n    {\n      \"token\": \"f9fef62c-0fe9-4117-a96a-96502f71c4f1xx\",\n      \"amount\": 200,\n      \"interval\": \"month\",\n      \"quantity\": 1,\n      \"frequency\": null,\n      \"description\": \"Item 2\"\n    }\n  ]\n}"

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

{
  "success": true,
  "invoice": {
    "id": "abc123",
    "name": "Invoice May 2025",
    "amount": 1500,
    "bill_to": "masud@yopmail.com",
    "bill_from": "admin@queue.com",
    "address": "123 fake st. blvd",
    "tax": 7.5,
    "payment_terms": "Net 30",
    "due": "2025-08-15",
    "issued": "2025-07-25",
    "payment_method": "wire",
    "invoice_number": "INV-1234",
    "credit_type": "none",
    "recurring_invoice_items": [
      {}
    ],
    "invoice_items": [
      {}
    ],
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "user": {
      "username": "Masud",
      "email": "masud@yopmail.com"
    }
  }
}