spdx.dev
In short: Getting listed on SPDX Tool Supplier Directory is free. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: Make your tool generate or consume valid SPDX, document validation, then file the requested supplier-information issue with its canonical URL.
Make your tool generate or consume valid SPDX, document validation, then file the requested supplier-information issue with its canonical URL.
Real validated SPDX support is required; listing is reviewed and explicitly is not certification or endorsement.
Open the submission page on spdx.dev and complete its form — that is the "Open submit page" link at the top of this page.
Real validated SPDX support is required; listing is reviewed and explicitly is not certification or endorsement.
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.