Pass a list of start_urls as parameter from Django to Scrapyd

Question

I'm working in a little scraping platform using Django and Scrapy (scrapyd as API). Default spider is working as expected, and using ScrapyAPI (python-scrapyd-api) I'm passing a URL from Django and scrap data, I'm even saving results as JSON to a postgres instance. This is for a SINGLE URL pass as parameter.

When trying to pass a list of URLs, scrapy just takes the first URL from a list. I don't know if it's something about how Python or ScrapyAPI is treating or processing this arguments.

# views.py
# This is how I pass parameters from Django
task = scrapyd.schedule(
        project=scrapy_project,
        spider=scrapy_spider,
        settings=scrapy_settings,
        url=urls
    )


# default_spider.py
def __init__(self, *args, **kwargs):
        super(SpiderMercadoLibre, self).__init__(*args, **kwargs)
        self.domain = kwargs.get('domain')
        self.start_urls = [self.url] # list(kwargs.get('url'))<--Doesn't work               
        self.allowed_domains = [self.domain]

# Setup to tell Scrapy to make calls from same URLs
def start_requests(self):
...
for url in self.start_urls:             
    yield scrapy.Request(url, callback=self.parse, meta={'original_url': url}, dont_filter=True)

Of course I can make some changes to my model so I can save every result iterating from the list of URLs and scheduling each URL using ScrapydAPI, but I'm wondering if this is a limitation of scrapyd itself or am I missing something about Python mechanics.

This is how ScrapydAPI is processing the schedule method:

def schedule(self, project, spider, settings=None, **kwargs):
        """
        Schedules a spider from a specific project to run. First class, maps
        to Scrapyd's scheduling endpoint.
        """

        url = self._build_url(constants.SCHEDULE_ENDPOINT)
        data = {
            'project': project,
            'spider': spider
        }
        data.update(kwargs)
        if settings:
            setting_params = []
            for setting_name, value in iteritems(settings):
                setting_params.append('{0}={1}'.format(setting_name, value))
            data['setting'] = setting_params
        json = self.client.post(url, data=data, timeout=self.timeout)
        return json['jobid']

I think i'm implementing everything as expected but everytime, no matter what approach is used, only the first URL from the list of URLs is scraped