packagist.org
In short: Getting listed on Packagist is free. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: Publish your real PHP SDK or integration from a public repository and set the canonical homepage in composer.json.
Publish your real PHP SDK or integration from a public repository and set the canonical homepage in composer.json.
Conditional on a functional Composer package with a unique vendor/name, public repository, valid metadata, and maintained releases.
Open the submission page on packagist.org and complete its form — that is the "Open submit page" link at the top of this page.
Conditional on a functional Composer package with a unique vendor/name, public repository, valid metadata, and maintained releases.
Priority sets the band — this one is do first. Cost (free) and effort (moderate) move it within that band, which puts it in the highest impact tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.