vercel.com
In short: Vercel Integrations Marketplace (vercel.com) accepts public integration listing. It is free to submit, takes a moderate amount of preparation, and scores 84/100 on our impact ranking (high impact).
Build an your tool Vercel integration, distribute its page, gain adoption, then apply for Marketplace visibility.
Community integrations can use direct pages; Marketplace listing generally requires 500 active installs and review.
Priority is high, which sets the band. It is free and moderate to complete, which adjusts it within that band. The score ranks your queue — it is not a measure of domain authority.