curl --request POST \
  --url https://api.getlago.com/api/v1/plans/{code}/fixed_charges \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fixed_charge": {
    "invoice_display_name": "Setup Fee",
    "units": "1.0",
    "apply_units_immediately": false,
    "properties": {
      "grouped_by": [
        "agent_name"
      ],
      "pricing_group_keys": [
        "agent_name"
      ],
      "graduated_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "flat_amount": "10",
          "per_unit_amount": "0.5"
        }
      ],
      "graduated_percentage_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "rate": "1",
          "flat_amount": "10"
        }
      ],
      "amount": "30",
      "free_units": 100,
      "package_size": 1000,
      "rate": "1",
      "fixed_amount": "0.5",
      "free_units_per_events": 5,
      "free_units_per_total_aggregation": "500",
      "per_transaction_max_amount": "3.75",
      "per_transaction_min_amount": "1.75",
      "volume_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "flat_amount": "10",
          "per_unit_amount": "0.5"
        }
      ]
    },
    "tax_codes": [
      "french_standard_vat"
    ],
    "add_on_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
    "add_on_code": "setup_fee",
    "code": "setup_fee_charge",
    "pay_in_advance": true,
    "prorated": false,
    "cascade_updates": true
  }
}
'

import requests

url = "https://api.getlago.com/api/v1/plans/{code}/fixed_charges"

payload = { "fixed_charge": {
        "invoice_display_name": "Setup Fee",
        "units": "1.0",
        "apply_units_immediately": False,
        "properties": {
            "grouped_by": ["agent_name"],
            "pricing_group_keys": ["agent_name"],
            "graduated_ranges": [
                {
                    "from_value": 0,
                    "to_value": 10,
                    "flat_amount": "10",
                    "per_unit_amount": "0.5"
                }
            ],
            "graduated_percentage_ranges": [
                {
                    "from_value": 0,
                    "to_value": 10,
                    "rate": "1",
                    "flat_amount": "10"
                }
            ],
            "amount": "30",
            "free_units": 100,
            "package_size": 1000,
            "rate": "1",
            "fixed_amount": "0.5",
            "free_units_per_events": 5,
            "free_units_per_total_aggregation": "500",
            "per_transaction_max_amount": "3.75",
            "per_transaction_min_amount": "1.75",
            "volume_ranges": [
                {
                    "from_value": 0,
                    "to_value": 10,
                    "flat_amount": "10",
                    "per_unit_amount": "0.5"
                }
            ]
        },
        "tax_codes": ["french_standard_vat"],
        "add_on_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
        "add_on_code": "setup_fee",
        "code": "setup_fee_charge",
        "pay_in_advance": True,
        "prorated": False,
        "cascade_updates": True
    } }
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({
    fixed_charge: {
      invoice_display_name: 'Setup Fee',
      units: '1.0',
      apply_units_immediately: false,
      properties: {
        grouped_by: ['agent_name'],
        pricing_group_keys: ['agent_name'],
        graduated_ranges: [{from_value: 0, to_value: 10, flat_amount: '10', per_unit_amount: '0.5'}],
        graduated_percentage_ranges: [{from_value: 0, to_value: 10, rate: '1', flat_amount: '10'}],
        amount: '30',
        free_units: 100,
        package_size: 1000,
        rate: '1',
        fixed_amount: '0.5',
        free_units_per_events: 5,
        free_units_per_total_aggregation: '500',
        per_transaction_max_amount: '3.75',
        per_transaction_min_amount: '1.75',
        volume_ranges: [{from_value: 0, to_value: 10, flat_amount: '10', per_unit_amount: '0.5'}]
      },
      tax_codes: ['french_standard_vat'],
      add_on_id: '1a901a90-1a90-1a90-1a90-1a901a901a90',
      add_on_code: 'setup_fee',
      code: 'setup_fee_charge',
      pay_in_advance: true,
      prorated: false,
      cascade_updates: true
    }
  })
};

fetch('https://api.getlago.com/api/v1/plans/{code}/fixed_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.getlago.com/api/v1/plans/{code}/fixed_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([
    'fixed_charge' => [
        'invoice_display_name' => 'Setup Fee',
        'units' => '1.0',
        'apply_units_immediately' => false,
        'properties' => [
                'grouped_by' => [
                                'agent_name'
                ],
                'pricing_group_keys' => [
                                'agent_name'
                ],
                'graduated_ranges' => [
                                [
                                                                'from_value' => 0,
                                                                'to_value' => 10,
                                                                'flat_amount' => '10',
                                                                'per_unit_amount' => '0.5'
                                ]
                ],
                'graduated_percentage_ranges' => [
                                [
                                                                'from_value' => 0,
                                                                'to_value' => 10,
                                                                'rate' => '1',
                                                                'flat_amount' => '10'
                                ]
                ],
                'amount' => '30',
                'free_units' => 100,
                'package_size' => 1000,
                'rate' => '1',
                'fixed_amount' => '0.5',
                'free_units_per_events' => 5,
                'free_units_per_total_aggregation' => '500',
                'per_transaction_max_amount' => '3.75',
                'per_transaction_min_amount' => '1.75',
                'volume_ranges' => [
                                [
                                                                'from_value' => 0,
                                                                'to_value' => 10,
                                                                'flat_amount' => '10',
                                                                'per_unit_amount' => '0.5'
                                ]
                ]
        ],
        'tax_codes' => [
                'french_standard_vat'
        ],
        'add_on_id' => '1a901a90-1a90-1a90-1a90-1a901a901a90',
        'add_on_code' => 'setup_fee',
        'code' => 'setup_fee_charge',
        'pay_in_advance' => true,
        'prorated' => false,
        'cascade_updates' => true
    ]
  ]),
  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.getlago.com/api/v1/plans/{code}/fixed_charges"

	payload := strings.NewReader("{\n  \"fixed_charge\": {\n    \"invoice_display_name\": \"Setup Fee\",\n    \"units\": \"1.0\",\n    \"apply_units_immediately\": false,\n    \"properties\": {\n      \"grouped_by\": [\n        \"agent_name\"\n      ],\n      \"pricing_group_keys\": [\n        \"agent_name\"\n      ],\n      \"graduated_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"flat_amount\": \"10\",\n          \"per_unit_amount\": \"0.5\"\n        }\n      ],\n      \"graduated_percentage_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"rate\": \"1\",\n          \"flat_amount\": \"10\"\n        }\n      ],\n      \"amount\": \"30\",\n      \"free_units\": 100,\n      \"package_size\": 1000,\n      \"rate\": \"1\",\n      \"fixed_amount\": \"0.5\",\n      \"free_units_per_events\": 5,\n      \"free_units_per_total_aggregation\": \"500\",\n      \"per_transaction_max_amount\": \"3.75\",\n      \"per_transaction_min_amount\": \"1.75\",\n      \"volume_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"flat_amount\": \"10\",\n          \"per_unit_amount\": \"0.5\"\n        }\n      ]\n    },\n    \"tax_codes\": [\n      \"french_standard_vat\"\n    ],\n    \"add_on_id\": \"1a901a90-1a90-1a90-1a90-1a901a901a90\",\n    \"add_on_code\": \"setup_fee\",\n    \"code\": \"setup_fee_charge\",\n    \"pay_in_advance\": true,\n    \"prorated\": false,\n    \"cascade_updates\": true\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://api.getlago.com/api/v1/plans/{code}/fixed_charges")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fixed_charge\": {\n    \"invoice_display_name\": \"Setup Fee\",\n    \"units\": \"1.0\",\n    \"apply_units_immediately\": false,\n    \"properties\": {\n      \"grouped_by\": [\n        \"agent_name\"\n      ],\n      \"pricing_group_keys\": [\n        \"agent_name\"\n      ],\n      \"graduated_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"flat_amount\": \"10\",\n          \"per_unit_amount\": \"0.5\"\n        }\n      ],\n      \"graduated_percentage_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"rate\": \"1\",\n          \"flat_amount\": \"10\"\n        }\n      ],\n      \"amount\": \"30\",\n      \"free_units\": 100,\n      \"package_size\": 1000,\n      \"rate\": \"1\",\n      \"fixed_amount\": \"0.5\",\n      \"free_units_per_events\": 5,\n      \"free_units_per_total_aggregation\": \"500\",\n      \"per_transaction_max_amount\": \"3.75\",\n      \"per_transaction_min_amount\": \"1.75\",\n      \"volume_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"flat_amount\": \"10\",\n          \"per_unit_amount\": \"0.5\"\n        }\n      ]\n    },\n    \"tax_codes\": [\n      \"french_standard_vat\"\n    ],\n    \"add_on_id\": \"1a901a90-1a90-1a90-1a90-1a901a901a90\",\n    \"add_on_code\": \"setup_fee\",\n    \"code\": \"setup_fee_charge\",\n    \"pay_in_advance\": true,\n    \"prorated\": false,\n    \"cascade_updates\": true\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.getlago.com/api/v1/plans/{code}/fixed_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  \"fixed_charge\": {\n    \"invoice_display_name\": \"Setup Fee\",\n    \"units\": \"1.0\",\n    \"apply_units_immediately\": false,\n    \"properties\": {\n      \"grouped_by\": [\n        \"agent_name\"\n      ],\n      \"pricing_group_keys\": [\n        \"agent_name\"\n      ],\n      \"graduated_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"flat_amount\": \"10\",\n          \"per_unit_amount\": \"0.5\"\n        }\n      ],\n      \"graduated_percentage_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"rate\": \"1\",\n          \"flat_amount\": \"10\"\n        }\n      ],\n      \"amount\": \"30\",\n      \"free_units\": 100,\n      \"package_size\": 1000,\n      \"rate\": \"1\",\n      \"fixed_amount\": \"0.5\",\n      \"free_units_per_events\": 5,\n      \"free_units_per_total_aggregation\": \"500\",\n      \"per_transaction_max_amount\": \"3.75\",\n      \"per_transaction_min_amount\": \"1.75\",\n      \"volume_ranges\": [\n        {\n          \"from_value\": 0,\n          \"to_value\": 10,\n          \"flat_amount\": \"10\",\n          \"per_unit_amount\": \"0.5\"\n        }\n      ]\n    },\n    \"tax_codes\": [\n      \"french_standard_vat\"\n    ],\n    \"add_on_id\": \"1a901a90-1a90-1a90-1a90-1a901a901a90\",\n    \"add_on_code\": \"setup_fee\",\n    \"code\": \"setup_fee_charge\",\n    \"pay_in_advance\": true,\n    \"prorated\": false,\n    \"cascade_updates\": true\n  }\n}"

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

{
  "fixed_charge": {
    "lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
    "lago_add_on_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
    "invoice_display_name": "Setup fee",
    "add_on_code": "setup_fee",
    "created_at": "2023-06-27T19:43:42Z",
    "code": "setup_fee",
    "charge_model": "standard",
    "pay_in_advance": false,
    "prorated": false,
    "properties": {
      "amount": "30",
      "graduated_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "flat_amount": "10",
          "per_unit_amount": "0.5"
        }
      ],
      "volume_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "flat_amount": "10",
          "per_unit_amount": "0.5"
        }
      ]
    },
    "units": 1,
    "lago_parent_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
    "taxes": [
      {
        "lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
        "name": "TVA",
        "code": "french_standard_vat",
        "rate": 20,
        "applied_to_organization": true,
        "created_at": "2023-07-06T14:35:58Z",
        "description": "French standard VAT"
      }
    ]
  }
}

{
  "status": 400,
  "error": "Bad request"
}

{
  "status": 401,
  "error": "Unauthorized"
}

{
  "status": 404,
  "error": "Not Found",
  "code": "object_not_found"
}

{
  "status": 422,
  "error": "Unprocessable entity",
  "code": "validation_errors",
  "error_details": {}
}