Dump/Export Matomo api Mudules & Actions to json

ListAllApi.php

<?php


namespace Piwik\Plugins\CoreConsole\Commands;

use Piwik\API\DocumentationGenerator;
use Piwik\API\Proxy;
use Piwik\Plugin\ConsoleCommand;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class ListAllApi extends ConsoleCommand
{
    protected function configure()
    {
        $this->setName('api:list');
        $this->setDescription('List All Api');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $ApiDocumentation = new DocumentationGenerator();
        $metas = Proxy::getInstance()->getMetadata();
        $class_list = array_keys($metas);
        echo json_encode(array_map(function($methods) use(&$class_list){
            $class_name = array_shift($class_list);
            $class_ref = new \ReflectionClass($class_name);
            $method_list = array_keys($methods);
            return array_map(function($method)use (&$method_list,$class_ref){
                $method_name = array_shift($method_list);
                if($class_ref->hasMethod($method_name)){
                    $method_ref = $class_ref->getMethod($method_name);
                    $method['__documentation'] = $method_ref->getDocComment();
                }
                if(isset($method['parameters'])) {
                    $params = $method['parameters'] ?? [];
                    if (is_array($params)) {
                        $method['parameters'] = array_map(function ($p) {
                            if ($p instanceof \Piwik\API\NoDefaultValue) {
                                return null;
                            }
                            return $p;
                        }, $params);
                    }
                    return $method;
                }
                return $method;
            },$methods);
        },$metas),JSON_PRETTY_PRINT);
    }
}

put it to plugins/CoreConsole/Commands;
then run

$./console api:list