curl --request POST \
  --url https://api.tread-horizon.com/v1/companies/{company-id}/invoices/{invoice-id}/add_on_charges \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "percentage": 0,
  "quantity": 123,
  "rate": 123,
  "add_on_rate_type": "RateForEach",
  "add_on_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "invoice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "external_id": "<string>",
  "accounting_id": "<string>",
  "load_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "revenue_rate_value": 123,
  "revenue_cost_rate_type": "RateForEach",
  "rebill_revenue_rate_value": 123,
  "rebill_percentage": 123,
  "cost_rate_value": 123
}
'

import requests

url = "https://api.tread-horizon.com/v1/companies/{company-id}/invoices/{invoice-id}/add_on_charges"

payload = {
    "name": "<string>",
    "percentage": 0,
    "quantity": 123,
    "rate": 123,
    "add_on_rate_type": "RateForEach",
    "add_on_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "invoice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "external_id": "<string>",
    "accounting_id": "<string>",
    "load_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "revenue_rate_value": 123,
    "revenue_cost_rate_type": "RateForEach",
    "rebill_revenue_rate_value": 123,
    "rebill_percentage": 123,
    "cost_rate_value": 123
}
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({
    name: '<string>',
    percentage: 0,
    quantity: 123,
    rate: 123,
    add_on_rate_type: 'RateForEach',
    add_on_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    invoice_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    external_id: '<string>',
    accounting_id: '<string>',
    load_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    revenue_rate_value: 123,
    revenue_cost_rate_type: 'RateForEach',
    rebill_revenue_rate_value: 123,
    rebill_percentage: 123,
    cost_rate_value: 123
  })
};

fetch('https://api.tread-horizon.com/v1/companies/{company-id}/invoices/{invoice-id}/add_on_charges', 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.tread-horizon.com/v1/companies/{company-id}/invoices/{invoice-id}/add_on_charges",
  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' => '<string>',
    'percentage' => 0,
    'quantity' => 123,
    'rate' => 123,
    'add_on_rate_type' => 'RateForEach',
    'add_on_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'invoice_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'external_id' => '<string>',
    'accounting_id' => '<string>',
    'load_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'revenue_rate_value' => 123,
    'revenue_cost_rate_type' => 'RateForEach',
    'rebill_revenue_rate_value' => 123,
    'rebill_percentage' => 123,
    'cost_rate_value' => 123
  ]),
  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.tread-horizon.com/v1/companies/{company-id}/invoices/{invoice-id}/add_on_charges"

	payload := strings.NewReader("{\n  \"name\": \"<string>\",\n  \"percentage\": 0,\n  \"quantity\": 123,\n  \"rate\": 123,\n  \"add_on_rate_type\": \"RateForEach\",\n  \"add_on_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"invoice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"external_id\": \"<string>\",\n  \"accounting_id\": \"<string>\",\n  \"load_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"revenue_rate_value\": 123,\n  \"revenue_cost_rate_type\": \"RateForEach\",\n  \"rebill_revenue_rate_value\": 123,\n  \"rebill_percentage\": 123,\n  \"cost_rate_value\": 123\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://api.tread-horizon.com/v1/companies/{company-id}/invoices/{invoice-id}/add_on_charges")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"<string>\",\n  \"percentage\": 0,\n  \"quantity\": 123,\n  \"rate\": 123,\n  \"add_on_rate_type\": \"RateForEach\",\n  \"add_on_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"invoice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"external_id\": \"<string>\",\n  \"accounting_id\": \"<string>\",\n  \"load_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"revenue_rate_value\": 123,\n  \"revenue_cost_rate_type\": \"RateForEach\",\n  \"rebill_revenue_rate_value\": 123,\n  \"rebill_percentage\": 123,\n  \"cost_rate_value\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.tread-horizon.com/v1/companies/{company-id}/invoices/{invoice-id}/add_on_charges")

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  \"name\": \"<string>\",\n  \"percentage\": 0,\n  \"quantity\": 123,\n  \"rate\": 123,\n  \"add_on_rate_type\": \"RateForEach\",\n  \"add_on_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"invoice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"external_id\": \"<string>\",\n  \"accounting_id\": \"<string>\",\n  \"load_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"revenue_rate_value\": 123,\n  \"revenue_cost_rate_type\": \"RateForEach\",\n  \"rebill_revenue_rate_value\": 123,\n  \"rebill_percentage\": 123,\n  \"cost_rate_value\": 123\n}"

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

{
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>",
    "percentage": "<string>",
    "quantity": "<string>",
    "total_amount": "<string>",
    "external_id": "<string>",
    "revenue_rate_value": "<string>",
    "revenue_cost_rate_type": "RateForEach",
    "add_on_requestable_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "add_on_applicable_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "accounting_id": "<string>",
    "rate": "<string>",
    "add_on_rate_type": "RateForEach",
    "rebill_revenue_rate_value": "<string>",
    "rebill_total_amount": "<string>",
    "add_on": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    },
    "invoice": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    },
    "load": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    },
    "job": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "job_id": "<string>",
      "loads_count": 123,
      "job_start_at": "2023-11-07T05:31:56Z",
      "unit_of_measure": "Load"
    },
    "rebill_percentage": "<string>"
  }
}

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

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

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

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

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

{
  "error": {
    "code": "<string>",
    "errors": [
      {
        "model": "<string>",
        "field": "<string>",
        "message": "<string>"
      }
    ]
  }
}