Factomos is an invoicing tool (B2B SaaS) available at [https://factomos.com]. This library is a PHP Client for the Factomos API. With it you can create invoices, estimates, send them, etc ...
The full API documentation is available at [https://factomos.docs.apiary.io/]
Official installation method is via composer and its packagist package factomos/factomos-php.
$ composer require factomos/factomos-php
The simplest usage of the library would be as follows:
<?php
require_once __DIR__ . '/vendor/autoload.php';
$factomosApiToken = 'my-api-token';
$factomosClient = new Factomos\ApiClient([
'FACTOMOS_API_TOKEN' => $factomosApiToken,
]);
$myInvoicesList = $factomosClient->listInvoices();