On June 15th, 2018 500px shut off their API. jekyll-500px-embed used the 500px API to retrieve information about a photo in order to render the embedded html and no longer functions without the API.
500px_tag.rb
into your site's plugins
directory..gitignore
._config.yml
500px_consumer_key_file: 500px-consumer-key
where 500px-consumer-key
is the name of the file created in #2.
<script src="//500px.com/embed.js" type="text/javascript"></script>
Supply the photo id you wish to embed to the 500px tag. The photo id can be found in the photo's url on http://500px.com.
{% 500px 89255597 %}