Add invoice lines

curl --request POST \
  --url https://api.fintoc.com/v2/invoices/{id}/add_lines \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "lines": [
    {
      "amount": 30000,
      "currency": "CLP",
      "period_end": "2026-06-01T00:00:00Z",
      "period_start": "2026-05-01T00:00:00Z",
      "quantity": 1,
      "name": "Premium Plan",
      "description": "A premium plan"
    }
  ]
}
'

import requests

url = "https://api.fintoc.com/v2/invoices/{id}/add_lines"

payload = { "lines": [
        {
            "amount": 30000,
            "currency": "CLP",
            "period_end": "2026-06-01T00:00:00Z",
            "period_start": "2026-05-01T00:00:00Z",
            "quantity": 1,
            "name": "Premium Plan",
            "description": "A premium plan"
        }
    ] }
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    lines: [
      {
        amount: 30000,
        currency: 'CLP',
        period_end: '2026-06-01T00:00:00Z',
        period_start: '2026-05-01T00:00:00Z',
        quantity: 1,
        name: 'Premium Plan',
        description: 'A premium plan'
      }
    ]
  })
};

fetch('https://api.fintoc.com/v2/invoices/{id}/add_lines', 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.fintoc.com/v2/invoices/{id}/add_lines",
  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([
    'lines' => [
        [
                'amount' => 30000,
                'currency' => 'CLP',
                'period_end' => '2026-06-01T00:00:00Z',
                'period_start' => '2026-05-01T00:00:00Z',
                'quantity' => 1,
                'name' => 'Premium Plan',
                'description' => 'A premium plan'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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.fintoc.com/v2/invoices/{id}/add_lines"

	payload := strings.NewReader("{\n  \"lines\": [\n    {\n      \"amount\": 30000,\n      \"currency\": \"CLP\",\n      \"period_end\": \"2026-06-01T00:00:00Z\",\n      \"period_start\": \"2026-05-01T00:00:00Z\",\n      \"quantity\": 1,\n      \"name\": \"Premium Plan\",\n      \"description\": \"A premium plan\"\n    }\n  ]\n}")

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

	req.Header.Add("Authorization", "<api-key>")
	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.fintoc.com/v2/invoices/{id}/add_lines")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"lines\": [\n    {\n      \"amount\": 30000,\n      \"currency\": \"CLP\",\n      \"period_end\": \"2026-06-01T00:00:00Z\",\n      \"period_start\": \"2026-05-01T00:00:00Z\",\n      \"quantity\": 1,\n      \"name\": \"Premium Plan\",\n      \"description\": \"A premium plan\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fintoc.com/v2/invoices/{id}/add_lines")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"lines\": [\n    {\n      \"amount\": 30000,\n      \"currency\": \"CLP\",\n      \"period_end\": \"2026-06-01T00:00:00Z\",\n      \"period_start\": \"2026-05-01T00:00:00Z\",\n      \"quantity\": 1,\n      \"name\": \"Premium Plan\",\n      \"description\": \"A premium plan\"\n    }\n  ]\n}"

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

{
  "id": "inv_2bVdWxLpzXq8RkNcM3JtUv9AhTe",
  "object": "invoice",
  "collection_method": "charge_automatically",
  "hosted_invoice_url": null,
  "created_at": "2026-05-01T12:00:00Z",
  "currency": "CLP",
  "customer": "cus_2bVdWyTnGq4PfLs7DkXjRm0CwIo",
  "lines": [
    {
      "id": "il_2bVdX0PqJs6RhNu9FmZlTo2EyKq",
      "object": "line_item",
      "name": "Premium Plan",
      "description": "A premium plan",
      "amount": 30000,
      "currency": "CLP",
      "period_end": "2026-06-01T00:00:00Z",
      "period_start": "2026-05-01T00:00:00Z",
      "quantity": 1
    },
    {
      "id": "il_2bVdX1QrKt7SiOvAGnAmUp3FzLr",
      "object": "line_item",
      "name": "Premium Plan",
      "description": "A premium plan",
      "amount": 20000,
      "currency": "CLP",
      "period_end": "2026-06-01T00:00:00Z",
      "period_start": "2026-05-01T00:00:00Z",
      "quantity": 2
    }
  ],
  "metadata": null,
  "mode": "live",
  "payments": [],
  "status": "draft",
  "subscription": "sub_2bVdWzKfHr5QgMt8ElYkSn1DxJp",
  "total": 50000
}

POST

invoices

{id}

add_lines

Add invoice lines

curl --request POST \
  --url https://api.fintoc.com/v2/invoices/{id}/add_lines \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "lines": [
    {
      "amount": 30000,
      "currency": "CLP",
      "period_end": "2026-06-01T00:00:00Z",
      "period_start": "2026-05-01T00:00:00Z",
      "quantity": 1,
      "name": "Premium Plan",
      "description": "A premium plan"
    }
  ]
}
'

import requests

url = "https://api.fintoc.com/v2/invoices/{id}/add_lines"

payload = { "lines": [
        {
            "amount": 30000,
            "currency": "CLP",
            "period_end": "2026-06-01T00:00:00Z",
            "period_start": "2026-05-01T00:00:00Z",
            "quantity": 1,
            "name": "Premium Plan",
            "description": "A premium plan"
        }
    ] }
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    lines: [
      {
        amount: 30000,
        currency: 'CLP',
        period_end: '2026-06-01T00:00:00Z',
        period_start: '2026-05-01T00:00:00Z',
        quantity: 1,
        name: 'Premium Plan',
        description: 'A premium plan'
      }
    ]
  })
};

fetch('https://api.fintoc.com/v2/invoices/{id}/add_lines', 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.fintoc.com/v2/invoices/{id}/add_lines",
  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([
    'lines' => [
        [
                'amount' => 30000,
                'currency' => 'CLP',
                'period_end' => '2026-06-01T00:00:00Z',
                'period_start' => '2026-05-01T00:00:00Z',
                'quantity' => 1,
                'name' => 'Premium Plan',
                'description' => 'A premium plan'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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.fintoc.com/v2/invoices/{id}/add_lines"

	payload := strings.NewReader("{\n  \"lines\": [\n    {\n      \"amount\": 30000,\n      \"currency\": \"CLP\",\n      \"period_end\": \"2026-06-01T00:00:00Z\",\n      \"period_start\": \"2026-05-01T00:00:00Z\",\n      \"quantity\": 1,\n      \"name\": \"Premium Plan\",\n      \"description\": \"A premium plan\"\n    }\n  ]\n}")

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

	req.Header.Add("Authorization", "<api-key>")
	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.fintoc.com/v2/invoices/{id}/add_lines")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"lines\": [\n    {\n      \"amount\": 30000,\n      \"currency\": \"CLP\",\n      \"period_end\": \"2026-06-01T00:00:00Z\",\n      \"period_start\": \"2026-05-01T00:00:00Z\",\n      \"quantity\": 1,\n      \"name\": \"Premium Plan\",\n      \"description\": \"A premium plan\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fintoc.com/v2/invoices/{id}/add_lines")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"lines\": [\n    {\n      \"amount\": 30000,\n      \"currency\": \"CLP\",\n      \"period_end\": \"2026-06-01T00:00:00Z\",\n      \"period_start\": \"2026-05-01T00:00:00Z\",\n      \"quantity\": 1,\n      \"name\": \"Premium Plan\",\n      \"description\": \"A premium plan\"\n    }\n  ]\n}"

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

{
  "id": "inv_2bVdWxLpzXq8RkNcM3JtUv9AhTe",
  "object": "invoice",
  "collection_method": "charge_automatically",
  "hosted_invoice_url": null,
  "created_at": "2026-05-01T12:00:00Z",
  "currency": "CLP",
  "customer": "cus_2bVdWyTnGq4PfLs7DkXjRm0CwIo",
  "lines": [
    {
      "id": "il_2bVdX0PqJs6RhNu9FmZlTo2EyKq",
      "object": "line_item",
      "name": "Premium Plan",
      "description": "A premium plan",
      "amount": 30000,
      "currency": "CLP",
      "period_end": "2026-06-01T00:00:00Z",
      "period_start": "2026-05-01T00:00:00Z",
      "quantity": 1
    },
    {
      "id": "il_2bVdX1QrKt7SiOvAGnAmUp3FzLr",
      "object": "line_item",
      "name": "Premium Plan",
      "description": "A premium plan",
      "amount": 20000,
      "currency": "CLP",
      "period_end": "2026-06-01T00:00:00Z",
      "period_start": "2026-05-01T00:00:00Z",
      "quantity": 2
    }
  ],
  "metadata": null,
  "mode": "live",
  "payments": [],
  "status": "draft",
  "subscription": "sub_2bVdWzKfHr5QgMt8ElYkSn1DxJp",
  "total": 50000
}

Authorizations

Authorization

string

header

required

Path Parameters

string

required

The id of the invoice to add line items to.

Body

application/json

lines

object[]

required

Line items to append to the invoice. Must contain at least one line item.

Minimum array length: 1

Show child attributes

Response

The updated invoice, including the new line items and the recalculated total.

string

required

Unique identifier of the invoice.

Example:

"inv_2bVdWxLpzXq8RkNcM3JtUv9AhTe"

hosted_invoice_url

string | null

required

URL of the hosted invoice page, where your customer can view and pay the invoice. null for invoices that are not open. In test mode, the URL points to the test mode portal.

Example:

"https://acme.billing.fintoc.com/invoices/inv_2bVdWxLpzXq8RkNcM3JtUv9AhTe"

object

any

required

Type of the object. Always invoice.

attempt_count

integer

required

Number of automatic charge attempts Fintoc has made on the invoice. 0 until the invoice is finalized and charged for the first time.

Example:

1

collection_method

enum<string>

required

The way Fintoc collects the invoice. charge_automatically means Fintoc charges default_payment_method once the invoice is finalized. send_invoice means Fintoc leaves the invoice open for you to collect, through hosted_invoice_url or outside Fintoc. Subscription invoices inherit the collection method when issued and keep that collection method even if the subscription changes later.

Available options:

charge_automatically,

send_invoice

Example:

"send_invoice"

created_at

string<date-time>

required

ISO 8601 timestamp of when the invoice was created.

Example:

"2026-05-01T12:00:00Z"

currency

enum<string>

required

Currency of the invoice, as an ISO 4217 code. Every line item uses this currency.

Available options:

CLP,

MXN

Example:

"CLP"

customer

string

required

id of the customer the invoice bills.

Example:

"cus_2bVdWyTnGq4PfLs7DkXjRm0CwIo"

default_payment_method

string | null

required

id of the payment method Fintoc charges when the invoice is finalized. null for invoices without one, such as subscription invoices.

Example:

"pm_2c4mDhAbCdEfGhIjKlMnOpQrStu"

external_payment

boolean

required

Whether the invoice was settled with a payment collected outside Fintoc. false for invoices Fintoc collected, and for invoices that are not yet paid.

Example:

false

lines

object[]

required

Line items that make up the invoice total.

Show child attributes

metadata

object | null

required

Set of key-value pairs attached to the invoice. null when the invoice has no metadata.

mode

enum<string>

required

Mode of the invoice. live invoices use real data; test invoices use fake data for integration testing. An API key only sees invoices that share its mode.

Available options:

live,

test

Example:

"live"

next_payment_attempt_at

string<date-time> | null

required

ISO 8601 timestamp of the next scheduled automatic charge attempt. null when no further attempt is scheduled.

Example:

"2026-05-02T12:00:00Z"

payments

object[]

required

Payment attempts to collect the invoice.

Show child attributes

status

enum<string>

required

Status of the invoice. Invoices start as draft, become open when finalized, and end as paid or void.

Available options:

draft,

open,

paid,

void

Example:

"draft"

subscription

string | null

required

id of the subscription that generated the invoice. null for invoices not tied to a subscription.

Example:

"sub_2bVdWzKfHr5QgMt8ElYkSn1DxJp"

total

integer

required

Total amount of the invoice, in the smallest unit of currency (for example, 30000 for $30000 CLP, since CLP has no minor unit, or 3000 for $30.00 MXN). Equals the sum of the line item amounts.

Example:

30000

⌘I