Contao is a Symfony-based CMS popular in the DACH region, with no content-write API in core.
How Sorank connects: Sorank self-hosted blog. Contao has no API endpoint to push articles into its own blog, so Sorank publishes and hosts the SEO articles on a Sorank-managed blog (your own subdomain or subfolder) that you link from your Contao site, with full internal linking. You still get a fully automated, indexable blog without fighting Contao's limitations.
Public API: Partial · Dedicated Make.com app: No · Create-blog-post endpoint: Indirect · API docs: https://github.com/DieSchittigs/contao-content-api-bundle